OCTEL CORP
8-K, 1999-11-12
CHEMICALS & ALLIED PRODUCTS
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<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON D.C.  20549
                             ----------------------

                                   FORM  8-K

               CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934


      Date of Report (date of earliest event reported): November 9, 1999
                        Commission file number   1-13879

                                 OCTEL   CORP.
             (Exact name of registrant as specified in its charter)


     DELAWARE                                    98-0181725
                                                 ----------
     (State or other jurisdiction of             (IRS Employer
     incorporation or organization)              Identification No.)

     Global House
     Bailey Lane
     Manchester
     United Kingdom                              M90 4AA
     (Address of principal executive offices)    (Zip Code)

     Registrant's telephone number, including area code: 011-44-161-498-8889
<PAGE>

ITEM 2 -  ACQUISITION OR DISPOSITION OF ASSETS
- ----------------------------------------------

On June 1, 1999 Octel Corp. ("Octel"), a Delaware Corporation, through its
subsidiary, The Associated Octel Company Limited, entered into a conditional
agreement with OBOAdler Holdings Limited ("Holdings"), a UK company, to acquire
all outstanding shares of OBOAdler Company Limited ("OBOAdler"), a UK company,
for payment of US$ 94.5 million in cash.  The agreement was conditional upon
compliance with the advance notification requirements contained in the Decision
and Order of the Federal Trade Commission ("FTC") Docket C-3815 dated June 16,
1998 and the expiration of all applicable waiting periods specified therein.
Advance notification requirements of said Decision and Order have been complied
with and the FTC has terminated all applicable waiting periods.  The acquisition
of OBOAdler closed on November 9, 1999. The FTC has approved Octel's acquisition
of OBOAdler by means of an Agreement and Consent Order on September 6, 1999.
Under FTC procedures, the Agreement and Consent Order cannot become final until
after expiration of a 60 day public notice period.

OBOAdler owns the Alcor group of companies, which manufacture and market tetra
ethyl lead ("TEL").  The Alcor group is based in Baar, Switzerland and includes
a TEL manufacturing plant in Germany.

Octel financed the entire purchase price by entering into a $100 million credit
agreement with Barclays Bank plc repayable by December 2002.

As part of its agreement with the FTC, Octel has entered into a long-term supply
agreement with Alcor's former US distributor, Allchem Industries Inc.,
("Allchem"), to provide Allchem's requirements for TEL for resale in the United
States for a period of 15 years.

While Octel will review OBOAdler's business, assets, structure and operations,
Octel has no intentions at the present time to use the plant, equipment or other
physical property of OBOAdler for purposes materially different from the
purposes for which they were used prior to the acquisition.

Additional information with respect to those transactions is set forth in the
exhibits hereto, which are included herein by reference.

                                      -2-
<PAGE>

ITEM 7 - FINANCIAL STATEMENTS
- -----------------------------

(a)  Financial Statements of Business Acquired.

The Registrant has determined that it is impracticable to file the required
audited historical financial statements of OBOAdler concurrently with this Form
8-K.  The Registrant will file such audited historical financial statements by
amendment as soon as practicable, but in any event not later than January 23,
2000.

(b)  Proforma Financial Information.

The Registrant has determined that it is impracticable to file the required
proforma information concurrently with this Form 8-K.  The Registrant will file
such proforma financial information by amendment as soon as practicable, but in
any event not later than January 23, 2000.

(c)  Exhibits.

     Number     Exhibit

     7.1        Share purchase agreement between OBOAdler Holdings Limited and
                The Associated Octel Company Limited relating to the sale and
                purchase of the whole of the issued share capital of OBOAdler
                Company Limited, dated June 1, 1999.

     7.2        $100,000,000 term loan agreement between Octel Corp., Octel
                Associates, Barclays Capital, Barclays Bank plc and others,
                dated June 3, 1999.

                                      -3-
<PAGE>

                                   SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                  OCTEL CORP.


Date:     November 9, 1999        By:
                                     -------------------------------------------

                                      Alan G Jarvis
                                      Vice President and Chief Financial Officer


                                 EXHIBIT INDEX


     Number     Description

     7.1        Share purchase agreement between OBOAdler Holdings Limited and
                The Associated Octel Company Limited relating to the sale and
                purchase of the whole of the issued share capital of OBOAdler
                Company Limited, dated June 1, 1999.

     7.2        $100,000,000 term loan agreement between Octel Corp., Octel
                Associates, Barclays Capital, Barclays Bank plc and others,
                dated June 3, 1999.

                                      -4-

<PAGE>

                                                                     Exhibit 7.1

                               Dated 1 June 1999



                           OBOADLER HOLDINGS LIMITED

                                      and


                      THE ASSOCIATED OCTEL COMPANY LIMITED



                            SHARE PURCHASE AGREEMENT

 relating to the sale and purchase of the whole of the issued share capital of
                            Oboadler CompanyLimited

                              LINKLATERS & PAINES
                                One Silk Street
                                London EC2Y 8HQ

                            Tel: (+44) 171 456 2000

                                     (DAB)
<PAGE>

    Agreement for Purchase of Shares

    This Agreement is made on I June 1999

    Between:

(1) Oboadler Holdings Limited (Registered No 3760651) incorporated in England
    whose registered office is at  High Field, Row Dow Lane, Shoreham, Kent
    TN15 6XN (the "Vendor"); and

(2) The Associated Octel Company Limited (Registered No344359) incorporated in
    England whose registered office is at Suite 2, Fourth Floor, Berkeley
    Square House, Berkeley Square, London W1X 6DT (the "Purchaser").

    It is agreed as follows:

1   Interpretation

    In this Agreement, unless the context otherwise requires, the provisions in
    this Clause 1 apply:

1.1 Definitions

    "Alcor" means Alcor Chemie AG (a Swiss company registered in the commercial
    registry of the Canton Zug);

    "Alcor Financing Costs" means all amounts (including, without limitation,
    principal, interest, fees and indemnity amounts) expressed to be payable by
    either or both of the Company and the Vendor to the Financiers under or in
    connection with the Financing Arrangements;

    "Alcor Purchase" means the purchase from Gunter Zobel and Elisabeth Zobel
    (both of Schneitstrasse 20, 6315 Oberageri) by the Company of all the shares
    of Alcor and Alcor Vertriebs pursuant to a sale and purchase agreement
    entered into on the date hereof;

    "Alcor Shares" means all the shares of Alcor and Alcor Vertriebs purchased
    by the Company pursuant to the Alcor Purchase;

    "Alcor Subsidiaries" means Alcor and Alcor Vertriebs;

    "Alcor Vertriebs" means Alcor Chemie Vertriebs AG (a Swiss company
    registered in the commercial registry of the Canton Zug);

    "Barclays Security" means the security taken by  the Financiers over the
    Shares and the Alcor Shares;

    "Business Day" means a day on which banks are generally open for business in
    London (excluding Saturdays, Sundays and public holidays);

    "Company" means Oboadler Company  Limited incorporated in England with
    registered number 3760777 whose registered office is at High Field, Row Dow
    Lane, Shoreham, Kent TN15 6XN;

    "Completion" means the completion of the sale and purchase of the Shares
    pursuant to Clause 6;

    "Completion Date" means the date of Completion;

- --------------------------------------------------------------------------------
                                      -1-
<PAGE>

    "Encumbrance" means any claim, charge, mortgage, security, lien, option,
    equity, power of sale or hypothecation or other third party rights,
    retention of title, right of pre-emption, right of first refusal or security
    interest of any kind;

    "Financiers" means Barclays Bank plc and any other Finance Party (as defined
    in the Financing Arrangements);

    "Financing Arrangements" means the US$90,000,000 facility agreement entered
    or to be entered into between the Company and, inter alia, Barclays Bank plc
    in order to effect the Alcor Purchase;

    "Finance Co" means Oboadler Finance Limited incorporated in England with
    registered number 3782993 whose registered office is at High Field, Row Dow
    Lane, Shoreham, Kent, TN15 6XN;

    "Guarantee" means the guarantee entered or to be entered into by the Vendor
    of the Company's obligations under or in connection with the Financing
    Arrangements;

    "Group" or "Group Companies" means the Company and its subsidiaries and
    "Group Company" means any one of them;

    "Independent Expert" means a person to whom the provisions of Clause 8.11
    apply;

    "Initial Consideration" means the cash sum of US$1,850,000 (one million
    eight hundred and fifty thousand US dollars) paid as a non-refundable
    deposit on account of the Total Consideration;

    "Retained Benefits" means the aggregate of:

        (i) the cash amounts (or cash equivalent amounts as determined by
        agreement between the parties or, in the absence of such agreement, by
        an Independent Expert) of any distribution made or declared between the
        date hereof and Completion by any Group Company to any Vendor Group
        Company (other than a Group Company); and

        (ii) in the case of any transaction entered into between the date hereof
        and Completion between any Group Company and any Vendor Group Company
        (other than a Group Company) otherwise than on arms' length terms, the
        cash amounts (or cash equivalent amounts as determined by agreement
        between the parties or, in the absence of such agreement, by an
        Independent Expert) of the net profit or net benefit received or
        receivable pursuant to such transactions by any Vendor Group Company
        (other than a Group Company);

    "Share Consideration" means the product of the following formula:-

                              US$1.00 + A + B - C

              where:-

              A = Transaction Costs unpaid at Completion;

              B = Supplemental Consideration payable at Completion; and

              C = the Retained Benefits.

    "Shares" means the entire voting and non-voting issued share capital of the
    Company;

- --------------------------------------------------------------------------------
                                      -2-
<PAGE>

    "Subordinated Loan" means the subordinated loan of US$10,000,000 made or to
    be made by the Purchaser (or an associated company thereof) to Finance Co
    and by Finance Co to the Company;

    "Supplemental Consideration" means the amount payable by the Purchaser to
    the Vendor pursuant to Clause 3.2.

    "Third Party Sale Price" means the cash proceeds of any disposal pursuant to
    Clause 4.3 to the extent received and retained by the Vendor;

    "Total Consideration" means the Initial Consideration plus the Share
    Consideration;

    "Transaction Costs" means all costs, losses and expenses (other than any
    costs, losses or expenses (i) incurred by reason of the breach by the Vendor
    or any Vendor Group Company of any contractual or legal provision; or (ii)
    taken into account in calculating the Retained Benefits) properly incurred
    by the Vendor or any member of the Vendor's Group (excluding any Group
    Company) in connection with the preparation, negotiation, entry into and
    putting into effect of this Agreement and the sale of the Shares
    contemplated herein;

    "Vendor Group" means the Vendor, the subsidiaries of the Vendor, the holding
    companies of the Vendor and any subsidiaries of such holding companies and
    "Vendor Group Company" means any one of them; and

    "Warranties" means the warranties and representations set out in Schedule 2
    and "Warranty" means any one of them;

1.2 Subordinate Legislation

    References to a statutory provision include any subordinate legislation made
    from time to time under that provision;

1.3 Modification etc. of Statutes

    References to a statute or statutory provision include that statute or
    provision as from time to time modified or re-enacted or consolidated
    whether before or after the date of this Agreement so far as such
    modification or re-enactment or consolidation applies or is capable of
    applying to any transactions entered into in accordance with this Agreement
    prior to Completion and (so far as liability thereunder may exist or can
    arise) shall include also any past statutory provision (as from time to time
    modified or re-enacted or consolidated) which such provision has directly or
    indirectly replaced;

1.4 Companies Act 1985

    The words "holding company" and "subsidiary" shall have the same meanings in
    this Agreement as their respective definitions in the Companies Act 1985 as
    modified by the Companies Act 1989;

1.5 Interpretation Act 1978

    The Interpretation Act 1978 shall apply to this Agreement in the same way as
    it applies to an enactment;

- --------------------------------------------------------------------------------
                                      -3-
<PAGE>

1.6 Clauses, Schedules etc.

    References to this Agreement include any Schedules to it and this Agreement
    as from time to time amended and references to Clauses and Schedules are to
    Clauses of and Schedules to this Agreement;

1.7 Information

    Any reference to books, records or other information means books, records or
    other information in any form including paper, electronically stored data,
    magnetic media, film and microfilm; and

1.8 Headings

    Headings shall be ignored in construing this Agreement.

1.9 Parties

    References to a party to this Agreement include references to the successors
    or permitted assigns (immediate or otherwise) of that party.

2   Agreement to Sell the Shares

    The Vendor shall sell or procure the sale of and the Purchaser, relying on
    the several representations, warranties and undertakings contained in this
    Agreement, shall purchase the Shares free from all Encumbrances (other than
    the Barclays Security) and together with all rights and advantages now and
    hereafter attaching thereto.

3   Consideration

    The consideration for the purchase of the Shares shall be the Total
    Consideration which shall be payable as provided in this Clause.

3.1 Initial Consideration

    In consideration for the Vendor entering into this agreement, the Purchaser
    shall pay to the Vendor on the date hereof the Initial Consideration, which
    on no account shall be repaid. The Vendor undertakes immediately to apply
    the sum of US$1,500,000 (one and a half million US Dollars) in subscribing
    for additional share capital of the Company.

3.2 Supplemental Consideration

    The Purchaser shall pay to the Vendor on Completion the sum of US$200,000 by
    way of Supplemental Consideration.

3.3 Share Consideration

    The consideration payable for the Shares on Completion, which shall be
    satisfied by the Purchaser as provided in Clauses 3.4 and 6.3, shall be the
    Share Consideration.

- --------------------------------------------------------------------------------
                                      -4-
<PAGE>

3.4 Method of Payment

    Payment of the Share Consideration shall be made in cash to the Vendor on
    Completion. The Purchaser undertakes to procure that on Completion it will
    draw down funds under facilities granted by the Financier to make repayment
    in full of all amounts due to the Financier under the Financing Arrangements
    and all amounts due by the Company to Finance Co. and by Finance Co. under
    the Subordinated Loan. The Vendor undertakes to procure that the Company
    repays all amounts due under the Financing Arrangements and by the Company
    to Finance Co. and  by Finance Co. under the Subordinated Loan on Completion
    in each case through a bank account specified by the Financier.

3.5 Further Payments on Account of Consideration

    Any part of the Share Consideration that comprises Transaction Costs shall
    be paid by the Purchaser to the Vendor in the manner set out in Clause 3.4
    by the later of:

    3.5.1  10 Business Days following receipt by the Purchaser of an invoice for
           any such Transaction Costs (along with such evidence as to the
           amounts incurred by the Vendor Group as the Purchaser reasonably
           requires); or

    3.5.2  if, prior to the date referred to in Clause 3.5.1 above, the
           Purchaser disputes the amount of any such Transaction Costs, 10
           Business Days following agreement between the parties, or
           determination by an Independent Expert, as to the amount of the
           relevant Transaction Costs.

4   Condition

4.1 Condition Precedent

    Completion of the sale and purchase of the Shares by the Vendor to the
    Purchaser pursuant to this Agreement is conditional upon (and accordingly
    inter alia beneficial ownership in the Shares will not pass to the Purchaser
    until) the Purchaser shall have complied with the advance written
    notification requirements contained in the Decision and Order of the Federal
    Trade Commission Docket C-3815 issued on 16 June 1998 and all applicable
    waiting periods in connection therewith having expired including any
    extensions thereto.

4.2 Responsibility for Satisfaction

    The Purchaser hereby undertakes to use all reasonable endeavours to ensure
    the satisfaction of the condition set out in Clause 4.1 as soon as possible
    following the date of this Agreement including, without limitation, making
    an appropriate notification and filing the notification with the Federal
    Trade Commission within 30 days of this Agreement and supplying information
    promptly. The Vendor shall use all reasonable endeavours promptly to co-
    operate with and provide all necessary information and assistance
    reasonably required by the Purchaser in connection with the foregoing
    obligation.

4.3 Non-Satisfaction

    If the condition in Clause 4.1 has not been satisfied on or before the date
    falling six months after the date hereof or such other date as the parties
    may agree:-

- --------------------------------------------------------------------------------
                                      -5-
<PAGE>

     4.3.1 the obligations of the Purchaser to purchase the Shares pursuant to
           Clause 2 shall lapse and no party shall have any claim against any
           other pursuant to Clause 2;

     4.3.2 the Purchaser shall use all reasonable endeavours to procure that:

           (i)  the Financier shall agree to extend the Financing Arrangements
                pending sale of the Shares as contemplated by Sub-clause 4.3.3;
                and

           (ii) shall not, save as specified in Sub-clause 4.3.3, take any step
                to enforce its rights under the Financing Arrangements;

     4.3.3 the Vendor will consent to the Financier exercising its rights under
           the Barclays Security to sell the Shares to a third party procured by
           the Financier or any agent appointed by it;

     4.3.4 subject to the Vendor complying with its obligations under this
           Agreement in all material respects, the Purchaser will pay to the
           Vendor the amount by which the Third Party Sale Price falls short of
           the Share Consideration;

     4.3.5 if applicable, the Vendor will pay to the Purchaser the amount by
           which the Third Party Sale Price exceeds the Share Consideration;

     4.3.6 the Purchaser will indemnify and keep indemnified the Vendor and each
           member of the Vendor Group and their directors, officers and
           employees against all claims, liabilities, losses, costs and expenses
           whatsoever and howsoever incurred by any of such persons in
           connection with the Vendor's ownership and the proper operation of
           the Group Companies provided that such indemnity shall not apply to
           fraud or wilful default on the part of such parties;

     4.3.7 the following provision shall have effect if and for so long as this
           Agreement shall have been assigned by way of security to the
           Financier:

           (i)  in this Sub-clause 4.3.7, "Third Party Sale Price" means the
                proceeds of any disposal pursuant to Clause 4.3 to the extent
                receivable and received by the Vendor and applied by the
                Financier in permanent reduction of the Alcor Financing Costs,
                provided that if the Shares are not disposed of by 31 March,
                2000 the Third Party Sale Price shall be deemed to be zero;

           (ii) the Purchaser will pay to the Vendor an amount equal to the
                difference between the Alcor Financing Costs and the Third Party
                Sale Price and shall indemnify the Vendor against all other
                costs, losses and expenses incurred by the Vendor or any Vendor
                Group Company (other than a Group Company) in connection with
                the Sale of the Shares referred to in Clause 4.3.3, and

          (iii) the provisions of Clauses 8.14 to 8.17 of this Agreement shall
                have effect only when the Sub-clause 4.3.7 shall apply.

5   Action Pending Completion

5.1 Vendor's General Obligations

    The Vendor shall use all reasonable endeavours to procure that, pending
    Completion:

    5.1.1 each Group Company will carry on business only in the ordinary
          course;

- --------------------------------------------------------------------------------
                                      -6-
<PAGE>

    5.1.2 each Group Company shall use all reasonable endeavours to preserve
          its assets and, in particular, will maintain in force all insurance
          policies and all other such insurances normally kept in force; and

    5.1.3 except as provided in this Agreement, each Group Company shall
          operate its business independently of the Purchaser's business. The
          Purchaser shall have, by reason of this Agreement, neither the intent
          nor the ability to influence directly or indirectly the ongoing
          business activities of the Vendor prior to satisfaction of the
          condition in Clause 4.1.

5.2 Restrictions on the Vendor
    Without prejudice to the generality of Clause 5.1, between the date of this
    Agreement and Completion, the Vendor shall use its reasonable endeavours to
    procure that each Group Company shall not:

    5.2.1 incur or enter into any agreement or commitment not in the ordinary
          course of business involving any capital expenditure in excess of
          DM5,000,000 in aggregate;

    5.2.2 incur any additional borrowings or incur any other indebtedness
          otherwise than in the ordinary course of business other than as
          required under the Financing Arrangements;

    5.2.3 make any loans, grant any credit (save in the ordinary course of
          business) or give any guarantee or indemnity (except as required
          hereby) to or for the benefit of any person or otherwise voluntarily
          assume any liability, whether actual or contingent, in respect of any
          obligation of any other person;

    5.2.4 allot, issue, redeem or repurchase any share or loan capital (or
          option to subscribe for the same) of any Group Company other than as
          required under the Financing Arrangements;

    5.2.5 acquire or agree to acquire or sell or agree to sell any shares or
          other interest in any company, partnership or other venture; or

    5.2.6 declare, make or pay any dividend or other distribution to
          shareholders other than to any Group Company;

5.3 Restrictions on the Purchaser
    The Purchaser acknowledges and agrees that, notwithstanding any provision of
    this Agreement, between the date hereof and Completion, it shall not
    directly or indirectly:

    5.3.1 be entitled to exercise any influence or control over the operations
          of the Vendor; or

    5.3.2 acquire any stock, share capital, equity or other interest in the
          Vendor.

6   Completion

6.1 Date and Place
    Subject to Clause 4, Completion shall take place at the registered office of
    the Purchaser 5 Business Days following fulfilment or waiver of the
    condition set out in Clause 4.1 or at such other place or on such other date
    as may be agreed between the Purchaser and the Vendor.

- --------------------------------------------------------------------------------
                                      -7-
<PAGE>

6.2 Obligations on Completion
    On Completion the Vendor shall procure that the obligations specified in
    Schedule 1 are fulfilled.

6.3 Payment of Share Consideration

    Against compliance with the provision of Clause 6.2, the Purchaser shall
    pay, on the Completion Date and in the manner specified in Clause 3.4, to
    the Vendor the Share Consideration.

6.4 Right to Terminate

    If the provisions of Clause 6.2 are not  complied with by the Vendor in all
    material respects by or on the date set for Completion in Clause 6.1 or
    waived by the Purchaser, the Purchaser shall be entitled (in addition to and
    without prejudice to all other rights or remedies available to it including
    the right to claim damages) by written notice to the Vendor served on such
    date:

    6.4.1 to elect to terminate its obligations under Clause 2 of this
          Agreement ;or

    6.4.2 to effect Completion so far as practicable having regard to the
          defaults which have occurred; or

    6.4.3 to fix a new date for Completion (not being more than 20 Business
          Days after the agreed date for Completion) in which case the foregoing
          provisions of this Clause 6.4 shall apply to Completion as so deferred
          but provided such deferral may only occur once.

6.5 Consequences of Termination
    If the Purchaser elects to terminate its obligations under Clause 2 of this
    Agreement pursuant to Clause 6.4.1:

    6.5.1 the obligations of the Purchaser to purchase the Shares pursuant to
          Clause 2 shall lapse and no party shall have any claim against any
          other pursuant to Clause 2;

    6.5.2 the Purchaser shall use all reasonable endeavours to procure that:

          (i)  the Financier shall agree to extend the Financing Arrangements
               pending sale of the Shares as contemplated by Sub-clause 6.5.3;
               and

          (ii) shall not, save as specified in Sub-clause 6.5.3, take any step
               to enforce its rights under the Financing Arrangements;

    6.5.3 the Vendor will consent to the Financier exercising its rights under
          the Barclays Security to sell the Shares to a third party procured by
          the Financier or any agent appointed by it;

    6.5.4 subject to the Vendor complying with its obligations under this
          Agreement in all material respects, the Purchaser will pay to the
          Vendor the amount by which the Third Party Sale Price falls short of
          the Share Consideration;

    6.5.5 if applicable, the Vendor will pay to the Purchaser the amount by
          which the Third Party Sale Price exceeds the Share Consideration;

- --------------------------------------------------------------------------------
                                      -8-
<PAGE>

    6.5.6 the Purchaser will indemnify and keep indemnified the Vendor and each
          member of the Vendor Group and their directors, officers and
          employees against all claims, liabilities, losses, costs and expenses
          whatsoever and howsoever incurred by any of such persons in
          connection with the Vendor's ownership and the proper operation of
          the Group Companies provided that such indemnity shall not apply to
          fraud or wilful default on the part of such parties;

    6.5.7 the following provision shall have effect if and for so long as this
          Agreement shall have been assigned by way of security to the
          Financier:

          (i)  in this Clause, "Third Party Sale Price" means the proceeds of
               any disposal pursuant to Clause 6.5 to the extent receivable and
               received by the Vendor and applied by the Financier in permanent
               reduction of the Alcor Financing Costs, provided that if the
               Shares are not disposed of by 31March, 2000 the Third Party Sale
               Price shall be deemed to be zero;

          (ii) the Purchaser will pay to the Vendor an amount equal to the
               difference between the Alcor Financing Costs and the Third Party
               Sale Price and shall indemnify the Vendor against all other
               costs, losses and expenses incurred by the Vendor or any Vendor
               Group Company (other than a Group Company) in connection with the
               Sale of the Shares referred to in Clause 6.5.2, and

          (iii)the provisions of Clauses 8.14 to 8. 17 of this Agreement shall
               have effect only when sub-clause 6.5.7 shall apply.

7   Warranties

7.1 Incorporation of Schedule 3

    7.1.1 The Vendor warrants and represents to the Purchaser and its
          successors in title in the terms set out in Schedule 2 subject only
          to:

          (i)  any matter expressly provided for under the terms of this
               Agreement; and

          (ii) any matter or thing hereafter done or omitted to be done pursuant
               to this Agreement or otherwise at the request in writing or with
               the approval in writing of the Purchaser.

    7.1.2 The Vendor acknowledges that the Purchaser has entered into this
          Agreement in reliance upon, amongst other things, the Warranties. Save
          as expressly otherwise provided, the Warranties shall be separate and
          independent and shall not be limited by reference to any other
          paragraph of the said Schedule or by anything in this Agreement.
          Breach of any of the Warranties will not adversely affect any of the
          Purchaser's obligations under Clause 4.3.

7.2 Updating to Completion
    The Vendor further warrants to the Purchaser and its successors in title
    that:

    7.2.1 subject to Clause 7.1, the Warranties will be fulfilled down to and
          will be true and accurate in all respects and not misleading in any
          respect at Completion as if they had been given again at Completion;
          and

- --------------------------------------------------------------------------------
                                      -9-
<PAGE>

     7.2.2 if after the signing of this Agreement and before Completion any
           event shall occur or matter arises which results or may result in any
           of the Warranties being unfulfilled, untrue, misleading or incorrect
           in any respect at Completion the Vendor shall immediately notify the
           Purchaser in writing fully thereof prior to Completion and the Vendor
           (at its own cost) shall make any investigation concerning the event
           or matter which the Purchaser may reasonably require.

7.3  Limitation of Liability

     The provisions of Schedule 3 shall apply.

7.4  Effect of Completion

     The Warranties and all other provisions of this Agreement insofar as the
     same shall not have been performed at Completion shall not be extinguished
     or affected by Completion, or by any other event or matter whatsoever
     (including, without limitation, any satisfaction of the condition contained
     in Clause 4.1), except by a specific and duly authorised written waiver or
     release by the Purchaser.

7.5  Right of Termination

     If prior to Completion it shall be found that any of the Warranties was,
     when given, or will be or would be, at Completion (as if they had been
     given again at Completion) not complied with or otherwise untrue or
     misleading (in any respect which is material in the context of the
     acquisition of the Shares contemplated herein) the Purchaser shall be
     entitled (in addition to and without prejudice to all other rights or
     remedies available to it and its successors in title including the right to
     claim damages) by notice in writing to the Vendor to terminate its
     obligations under Clause 2 of this Agreement but failure to exercise this
     right shall not constitute a waiver of any other rights of the Purchaser or
     its successors in title arising out of any breach of Warranty.

7.6  Consequences of Termination

     If the Purchaser elects to terminate its obligations under Clause 2 of this
     Agreement pursuant to Clause 7.5:

     7.6.1 the obligations of the Purchaser to purchase the Shares pursuant to
           Clause 2 shall lapse and no party shall have any claim against any
           other pursuant to Clause 2;

     7.6.2 the Purchaser shall use all reasonable endeavours to procure that:

           (i)  the Financier shall agree to extend the Financing Arrangements
                pending sale of the Shares as contemplated by Sub-clause 7.6.3;
                and

           (ii) shall not, save as specified in Sub-clause 7.6.3, take any step
                to enforce its rights under the Financing Arrangements;

     7.6.3 the Vendor will consent to the Financier exercising its rights under
           the Barclays Security to sell the Shares to a third party procured by
           the Financier or any agent appointed by it;

     7.6.4 subject to the Vendor complying with its obligations under this
           Agreement in all material respects, the Purchaser will pay to the
           Vendor the amount by which the Third Party Sale Price falls short of
           the Share Consideration;

                                     -10-
<PAGE>

     7.6.5 if applicable, the Vendor will pay to the Purchaser the amount by
           which the Third Party Sale Price exceeds the Share Consideration;

     7.6.6 the Purchaser will indemnify and keep indemnified the Vendor and each
           member of the Vendor Group and their directors, officers and
           employees against all claims, liabilities, losses, costs and expenses
           whatsoever and howsoever incurred by any of such persons in
           connection with the Vendor's ownership and the proper operation of
           the Group Companies provided that such indemnity shall not apply to
           fraud or wilful default on the part of such parties;

     7.6.7 the following provision shall have effect if and for so long as this
           Agreement shall have been assigned by way of security to the
           Financier:

           (i)  in this Clause, "Third Party Sale Price" means the proceeds of
                any disposal pursuant to Clause 7.6 to the extent receivable and
                received by the Vendor and applied by the Financier in permanent
                reduction of the Alcor Financing Costs, provided that if the
                Shares are not disposed of by 31 March,the Purchaser will pay to
                the Vendor an amount equal to the difference between the Alcor
                Financing Costs and the Third Party Sale Price and shall
                indemnify the Vendor against all other costs, losses and
                expenses incurred by the Vendor or any Vendor Group Company
                (other than a Group Company) in connection with the Sale of the
                Shares referred to in Clause 7.6.1, and

           (ii) the provisions of Clauses 8.14 to 8.17 of this Agreement shall
                have effect only when sub-clause 7.6.7 shall apply.

7.7  Information from Group Companies

     The Vendor agrees with the Purchaser (for itself and as trustee for each
     Group Company and their respective officers, employees and agents) to
     assign to the Purchaser any rights, remedies or claims which they may have
     in respect of any misrepresentation, inaccuracy or omission in or from any
     information or advice supplied or given by any Group Company or their
     respective officers, employees, former shareholders or agents in connection
     with (i) the Alcor Purchase or; (ii) (save in respect of any fraud or
     wilful default on the part of such person) assisting the Vendor in the
     making of any representation and the giving of the Warranties.

8    Other Provisions

8.1  Announcements

     No announcement or circular in connection with the existence or the subject
     matter of this Agreement shall be made or issued by or on behalf of the
     Vendor or the Purchaser without the prior written approval of the other
     party. This shall not affect any announcement or circular required by law
     or any regulatory body or the rules of any recognised stock exchange but
     the party with an obligation to make an announcement or issue a circular
     shall consult with the other party/parties insofar as is reasonably
     practicable before complying with such an obligation.

8.2  Successors and Assigns

     8.2.1 Subject to Clause 8.2.2 and Clause 8.2.3, this Agreement is personal
           to the parties to it and accordingly, neither the Purchaser nor the
           Vendor may, without the prior written

                                     -11-
<PAGE>

           consent of the other, assign the benefit of all or any of the other's
           obligations under this Agreement, nor any benefit arising under or
           out of this Agreement.

     8.2.2 Except as otherwise expressly provided in this Agreement, the
           Purchaser or the Vendor may, without the consent of the other, assign
           to a connected company the benefit of all or any of the other party's
           obligations under this Agreement provided however that such
           assignment shall not be absolute but shall be expressed to have
           effect only for so long as the assignee remains a connected company.
           For the purposes of this sub-clause a "connected company" is a
           company which is a subsidiary of the party concerned or which is a
           holding company of such party or a subsidiary of such holding
           company.

     8.2.3 The Vendor may, without the consent of the Purchaser, assign or
           procure the assignment to all or any of the Financiers all or any of
           the Vendor's rights and benefits under this Agreement (in which case
           such Financier(s) shall be entitled to exercise all rights or
           discretions vested in the Vendor under this Agreement.)

8.3  Variation

     No variation of this Agreement shall be effective unless in writing and
     signed by or on behalf of each of the parties to this Agreement.

8.4  Time of the Essence

     Time shall be of the essence of this Agreement both as regards any dates
     and periods mentioned and as regards any dates and periods which may be
     substituted for them in accordance with this Agreement or by agreement in
     writing between the parties.

8.5  Further Assurance

     At any time after the date of this Agreement the Vendor shall and shall use
     its best endeavours to procure that any necessary third party shall execute
     such documents and do such acts and things as the Purchaser may reasonably
     require for the purpose of giving to the Purchaser the full benefit of all
     the provisions of this Agreement.

8.6  No Double Recovery

     The Vendor agrees that it shall not be entitled, whether pursuant to this
     Agreement or any other agreement, to the recovery of any Transaction Costs
     or any amounts due under Clauses 3.3, 4.3, 6.5 or 7.6 more than once.

8.7  Interest

     If the Vendor or the Purchaser default in the payment when due of any sum
     payable under this Agreement (howsoever determined) the liability of the
     Vendor or the Purchaser (as the case may be) shall be increased to include
     interest on such sum from the date when such payment is due until the date
     of actual payment (as well after as before judgement) at a rate per annum
     of 2per cent above the base rate from time to time of Barclays Bank PLC.
     Such interest shall accrue from day to day and shall be compounded with
     monthly rests.

                                     -12-
<PAGE>

8.8  Notices

      8.8.1 Any notice, claim or demand in connection with this Agreement shall
            be in writing in English (a "Notice") and shall be sufficiently
            given or served if delivered or sent:

            In the case of the Vendor to:

            High Field
            Row Dow Lane
            Shoreham
            Kent TN15 6XN

            Attention: Graham North



            With a copy to Barclays Bank plc

            5 The North Colonade

            Canary Wharf

            London  E14 4BB

            Fax:  0171 773 4894

            Attention:  Karl Nolson

            In the case of the Purchaser to The Associated Octel Company
            Limited:

            Suite 2
            Fourth Floor
            Berkeley Square House
            Berkeley Square
            London
            W1X 6DT



            Fax: 0171 647 2800

            Attention:  The Company Secretary

      8.8.2 Any Notice may be delivered by hand or sent by fax or prepaid post
            (first class in the case of service in the United Kingdom and
            airmail in the case of international service). Without prejudice to
            the foregoing, any Notice shall conclusively be deemed to have been
            received on the next working day in the place to which it is sent,
            if sent by messenger, telegram, telex or fax, or 60 hours from the
            time of posting, if sent by post, or at the time of delivery, if
            delivered by hand.

8.9  Invalidity

     If any provision in this Agreement shall be held to be illegal, invalid or
     unenforceable, in whole or in part, under any enactment or rule of law,
     such provision or part shall to that extent be deemed not to form part of
     this Agreement but the legality, validity or enforceability of the
     remainder of this Agreement shall not be affected.

                                     -13-
<PAGE>

8.10  Counterparts

      This Agreement may be entered into in any number of counterparts, all of
      which taken together shall constitute one and the same instrument. Any
      party may enter into this Agreement by executing any such counterpart.

8.11  Expert Determination

      Where this Agreement provides for, or envisages, the appointment of an
      Independent Expert, the following shall apply:

      8.11.1 the Independent Expert shall be an expert agreed upon by the
             parties or, failing agreement within one month of either party
             initiating (or attempting to initiate) discussions on the identity
             of such expert, the expert shall be selected, on the application of
             either party, by the President for the time being of the Institute
             of Chartered Accountants in England and Wales;

     8.11.2  the Independent Expert shall be deemed to act as expert and not as
             arbitrator in any determination made by it hereunder;

     8.11.3  in the absence of negligence, manifest error or bad faith, the
             Independent Expert's determination shall be conclusive and binding;
             and each party shall bear its own costs and the reasonable costs of
             the Independent Expert shall be borne equally between the parties.

8.12 Governing Law and Submission to Jurisdiction

     8.12.1  This Agreement shall be governed by and construed in accordance
             with English law.

     8.12.2  Both parties irrevocably agree that the courts of England are to
             have exclusive jurisdiction to settle any dispute which may arise
             out of or in connection with this Agreement. Both parties
             irrevocably submit to the jurisdiction of such courts and waive any
             objection to proceedings in any such court on the ground of venue
             or on the ground that proceedings have been brought in an
             inconvenient forum. This Clause 8.12.2 is for the benefit of the
             Purchaser and shall not limit its right to take proceedings in any
             other court of competent jurisdiction.

     8.12.3  Nothing in this Agreement shall affect the right to serve process
             in any other manner permitted by law or the right to bring
             proceedings in any other jurisdiction for the purposes of the
             enforcement or execution of any judgement or other settlement in
             any other courts.

8.13 Entire Agreement

     This Agreement (together with the documents referred to herein) constitutes
     the entire agreement and understanding between the parties hereto with
     respect to the matters contemplated by this Agreement and supersedes any
     previous agreement between the parties hereto in relation to such matters.
     Each party hereto hereby acknowledges that in entering into this Agreement
     it has not relied on any representation, warranty, agreement, statement or
     undertaking not set out in this Agreement or such other documents referred
     to herein and that (in the absence of fraud) it will not have any right or
     remedy arising out of any such representation, warranty, agreement,
     statement or undertaking.

                                     -14-
<PAGE>

8.14  Set-off

      All sums payable under this Agreement shall be paid in full without set-
      off or counter-claim and free and clear of and without deduction of or
      withholding for or on account of any present or future taxes, duties or
      other charges except as required by law. If any such payment shall be
      subject to any such tax or if any party to this Agreement shall be
      required by law to make any such deduction or withholding, such party will
      pay such tax, will ensure that such payment, deduction or withholding will
      not exceed the minimum legal liability therefor and will pay to the other
      party such additional amounts as will result in that other party receiving
      a net amount equal to the full amount which it would have received had no
      such payment, deduction or withholding been required.

8.15  Nature of Purchaser's Obligation
      The Purchaser acknowledges and agrees that its obligation to make any
      payment to the Vendor under this Agreement is a primary obligation and
      shall:

      (a)  be an absolute, unconditional and irrevocable obligation, independent
           of any of its other obligations whatsoever including, without
           limitation, any obligations it may have to the Vendor or any other
           person and independent of the Vendor's obligations to it (whether
           under this Agreement or otherwise);

      (b)  not be discharged, impaired or otherwise affected or limited in any
           way whatsoever by any act, omission, matter, fact, circumstances or
           thing, whether or not known to the Purchaser, the Vendor or any other
           person, including, without limitation;

           (i)  any variation, amendment, supplement, abrogation, invalidity or
                unconstitutionally of any document or the failure of the Vendor
                to fulfil any of its obligations thereunder;

           (ii) the winding-up or dissolution of the Vendor or any moratorium in
                relation to, or rescheduling of, its indebtedness or any other
                composition with creditors, or any change in the status,
                function, control or ownership of the Vendor;

          (iii) any defect in the constitution or incorporation of, or any legal
                limitation, disability, incapacity or other circumstances
                relating to, the Vendor or any other relevant person;

          (iv)  any part of the Alcor Financing Costs being or becoming illegal,
                invalid, unenforceable or ineffective in any respect;

          (v)   any time, concession, waiver, consent or other indulgence being
                granted or agreed to be granted to the Vendor or any other
                person in respect of any part of the Alcor Financing Costs;

          (vi)  the taking, variation, compromise, renewal or release of or
                refusal or neglect to perfect or enforce any rights, remedies or
                securities against the Vendor or any other person;

          (vii) any time, concession, waiver, consent or other indulgence being
                granted or agreed to be granted to the Vendor or any other
                person in respect of any part of the Alcor Financing Costs;

                                     -15-
<PAGE>

          (viii) the taking, variation, compromise, renewal or release of or
                 refusal or neglect to perfect or enforce any rights, remedies
                 or securities against the Vendor or any other person;

          (ix)   any other act, event, matter, limitation or omission which
                 might otherwise operate to discharge, impair or affect any part
                 of the Alcor Financing Costs or any of the obligations of the
                 Purchaser under this Agreement or any rights, powers or
                 remedies conferred on the Vendor by this Agreement or by law,

          to the intent that the Purchaser's obligations under this Agreement
          shall be and remain in full force and effect and this Agreement be
          construed accordingly as if there were no such acts, omissions,
          matters, facts, circumstances or things as contemplated by this Clause
          8.15;

     (c)  continue until such date as the Alcor Financing Costs have been
          permanently paid and discharged in full, notwithstanding the fact that
          the amount of Alcor Financing Costs may at any time be zero and
          notwithstanding any failure by the Vendor to reduce or otherwise
          mitigate the extent of Alcor Financing Costs at any time.

8.16 Where any discharge (whether in respect of the Alcor Financing Costs or any
     security for those obligations or otherwise) is made in whole or in part or
     any arrangement is made on the faith of any payment, security or other
     disposition which is avoided or must be restored on insolvency, liquidation
     or otherwise without limitation, the liability of the Purchaser under this
     Agreement shall continue as if the discharge or arrangement had not
     occurred (but only to the extent that such payment, security or other
     disposition is avoided or restored).

8.17 The Purchaser indemnifies the Vendor on demand against any loss or
     liability suffered by it if any obligation of the Purchaser under this
     Agreement is or becomes unenforceable, invalid or illegal.


     AS WITNESS this Agreement has been signed by or on behalf of the parties
     hereto the day and year first before written.

      SIGNED by

      on behalf of Oboadler Holdings
      LIMITED in the presence of:



      SIGNED by

      on behalf of THE ASSOCIATED
      OCTEL COMPANY LIMITED in
      the presence of:

                                     -16-
<PAGE>

                                  Schedule 1

                            Completion Obligations


1    General

     On Completion the Vendor shall deliver or make available to the Purchaser:

1.1  transfers of the Shares duly executed by the registered holder(s) in favour
     of the Purchaser or as it may direct accompanied by the relative share
     certificate(s) (or an express indemnity in a form satisfactory to the
     Purchaser in the case of any certificate found to be missing);

1.2  the written resignations of each of the directors and secretaries of the
     Company from his office as a director or secretary to take effect on the
     date of Completion with acknowledgements signed by each of them in a form
     satisfactory to the Purchaser and executed as a deed to the effect that he
     has no claim against any Group Company for compensation for loss of office
     (whether contractual, statutory or otherwise), unfair dismissal, redundancy
     or otherwise together, if relevant, with all credit cards (if any) in the
     name of each Group Company issued to any of the persons so resigning;

1.3  the written resignations of the auditors of the Company to take effect on
     the date of Completion, with acknowledgements signed by each of them in a
     form satisfactory to the Purchaser to the effect that they have no claim
     against the Company;

1.4  (for the Purchaser itself and as agent for the Company) the certificates of
     incorporation, corporate seals (if any), statutory and other books of each
     Group Company (duly written up-to-date) and the share certificates in
     respect of each of the Alcor Subsidiaries unless held by the Financiers;

1.5  such financial and accounting books and records of each Group Company as
     are in the possession of each Group Company;

1.6  (if the Purchaser so requires) irrevocable powers of attorney (in such form
     as the Purchaser may reasonably require) executed by the Vendor in favour
     of the Purchaser to enable the Purchaser (pending registration of the
     relevant transfer) to exercise all voting and other rights attaching to the
     Shares and to appoint proxies for this purpose;

1.7  such bank statements of all bank accounts of all Group Companies as at the
     date not more than three Business Days prior to Completion as are in the
     possession of such Group Companies.

2    Board Resolutions Of The Group Companies

     On Completion the Vendor shall procure the passing of Board Resolutions of
     the Company inter alia:

2.1  (if so required by the Purchaser) revoking all existing authorities to
     bankers in respect of the operation of its bank accounts and giving
     authority in favour of such persons as the Purchaser may nominate to
     operate such accounts;

2.2  accepting the resignations referred to in paragraph 1.2 of this Schedule
     and appointing such persons (within the maximum number permitted by the
     constitution of the relevant company) as the Purchaser may nominate as
     directors and secretary;

                                     -17-
<PAGE>

2.3  approving the registration of the share transfers referred to in paragraph
     1.1 of this Schedule;

2.4  accepting the resignations referred to in paragraph 1.3 of this Schedule
     and appointing PricewaterhouseCoopers as auditors of each Group Company;

2.5  changing its registered office in accordance with any instructions given by
     the Purchaser not later than 3 Business Days prior to the Completion Date;
     and

2.6  changing its accounting reference date in accordance with any instructions
     given by the Purchaser,

and shall hand to the Purchaser duly certified copies of such Resolutions.

                                     -18-
<PAGE>

                                  Schedule 2

                 Warranties given by the Vendor under Clause 7


1    The Vendor is a company duly incorporated and validly existing under its
     country of incorporation.

2    The Vendor has the legal right and full power and authority to enter into
     and perform this Agreement which when executed will constitute valid and
     binding obligations on the Vendor, in accordance with its terms.

3    The execution and delivery of, and the performance by the Vendor of its
     obligations under, this Agreement will not:

3.1  result in a breach of any provision of the memorandum or articles of
     association of the Vendor; or

3.2  result in a breach of or give any third party a right to terminate or
     modify, or result in the creation of any Encumbrance other than under the
     Financing Arrangements under any agreement, licence or other instrument or
     result in a breach of any order, judgement or decree of any Court,
     governmental agency or regulatory body to which the Vendor is a party or by
     which the Vendor or any of its assets is bound.

4    The Vendor will, at Completion, be entitled to sell and transfer to the
     Purchaser the full legal and beneficial ownership of the Shares on the
     terms of this Agreement without the consent of any third party other than
     under the Financing Arrangements.

5    To the best of the knowledge, information and belief of the Vendor, having
     made due and careful enquiries, the Shares comprise the whole of the
     allotted and issued share capital of the Company, have been properly and
     validly allotted and issued and are each fully paid.

                                     -19-
<PAGE>

                                  Schedule 3

                   Limitation of Liability under Clause 7.3


     Notwithstanding the provisions of Clauses 7.1 and 7.2, the Vendor shall not
     be liable for breach of Warranty under this Agreement:

1    Time Limits: in respect of any claim unless notice of such claim is given
     in writing by the Purchaser to the Vendor setting out such details as are
     available of the specific matter in respect of which the claim is made,
     within 12months following Completion;

2    Minimum and Maximum Claims: in respect of any claim arising from any single
     circumstance if the amount of the claim does not exceed US$10,000 (save
     that claims relating to a series of connected matters shall be aggregated
     for this purpose) and in respect of all claims to the extent that the
     amount claimed exceeds the Total Consideration.

     Fraud etc: None of the limitations above shall apply to any claim which
     arises or is increased, or to the extent to which it arises or is
     increased, as the consequence of, or which is delayed as a result of,
     fraud, wilful misconduct or wilful concealment by the Vendor or any officer
     or employee of the Vendor.

                                     -20-

<PAGE>

                                  OCTEL CORP.
                                   AS PARENT

                               OCTEL ASSOCIATES
                                      AND
                          THE COMPANIES NAMED HEREIN
                        AS BORROWERS AND/OR GUARANTORS

                               BARCLAYS CAPITAL
                                  AS ARRANGER

                            THE BANKS NAMED HEREIN
                               AS ORIGINAL BANKS

                               BARCLAYS BANK PLC
                               AS FACILITY AGENT
                              AND SECURITY AGENT

                                      AND

                                    OTHERS


         ------------------------------------------------------------


                       $100,000,000 TERM LOAN AGREEMENT


         ------------------------------------------------------------





                                CLIFFORD CHANCE
<PAGE>

                                   CONTENTS


Clause                                                                      Page

1.  Interpretation.............................................................1

2.  The Facilities............................................................24

3.  Participation Of Banks....................................................25

4.  Conditions Precedent......................................................26

5.  Borrowers Under The Facilities............................................27

6.  Utilisation Procedures....................................................29

7.  Interest..................................................................30

8.  Selection Of Interest Periods.............................................31

9.  Market Disruption.........................................................31

10. Repayment Of Advances.....................................................32

11. Prepayment And Cancellation...............................................33

12. Payments..................................................................35

13. Taxes.....................................................................36

14. Change In Circumstances...................................................38

15. Fees, Expenses And Stamp Duties...........................................40

16. Guarantee And Additional Guarantors.......................................42

17. Security And Releases.....................................................44

18. Representations And Warranties............................................45

19. Undertakings..............................................................55

20. Events Of Default.........................................................77

21. The Agents And The Other Finance Parties..................................83

22. Certificates Conclusive And Application Of Moneys.........................89

23. Pro Rata Payments.........................................................89

24. Set-Off...................................................................91

25. Notices...................................................................91

26. No Implied Waivers........................................................92

27. Invalidity Of Any Provision...............................................92

28. Confidentiality...........................................................93

29. Changes To Parties........................................................93

30. Banks' Decisions..........................................................95

31. Indemnities...............................................................97

32. Miscellaneous.............................................................98
<PAGE>

33. Governing Law And Submission To Jurisdiction .............................98

34. Counterparts .............................................................98

Schedule 1 The Original Banks ................................................99

Schedule 2 ..................................................................100
    Part A Borrowers And/Or Guarantors ......................................100
    Part B The Security Documents ...........................................101

Schedule 3 Documentary Conditions Precedent .................................102

Schedule 4 Form Of Utilisation Request ......................................104

Schedule 5 Mandatory Costs Rate .............................................105

Schedule 6 Substitution Certificate .........................................107

Schedule 7 ..................................................................111
    Part A Formalities Certificate (Octel Associates) .......................111
    Part B Formalities Certificate (Us Obligors) ............................113
    Part C Formalities Certificate (Others) .................................115

Schedule 8 Guarantee Provisions .............................................117

Schedule 9 Accession Document ...............................................120

Schedule 10 Form Of Confidentiality Undertaking .............................123

Schedule 11 Form Of Syndication Agreement ...................................126


<PAGE>

THIS FACILITY AGREEMENT is made on             3  June 1999

BETWEEN:

(1)  OCTEL CORP., a corporation organised under the laws of the State of
     Delaware, USA (the "Parent");

(2)  OCTEL TRADING LIMITED (formerly Hamsard One Thousand and Seventy Five
     Limited) (a company incorporated in England with registered number 3516648)
     ("Octel Trading") and OCTEL RESOURCES LIMITED (formerly Hamsard One
     Thousand and Thirty Three Limited) (a company incorporated in England with
     registered number 3316334) ("Octel Resources") (each a "Partner" and
     together the "Partners") in their capacity as partners of a partnership
     trading in the United Kingdom under the name of Octel Associates, whose
     address is Unit 2, Fourth Floor, Berkeley Square House, Berkeley Square,
     London W1;

(3)  OCTEL ASSOCIATES and THE COMPANIES named in Part A of Schedule 2 as
     Borrowers and/or Guarantors;

(4)  BARCLAYS CAPITAL as arranger (the "Arranger");

(5)  THE BANKS AND FINANCIAL INSTITUTIONS named in Schedule 1 as original banks
     (the "Original Banks");

(6)  BARCLAYS BANK PLC as facility agent (the "Facility Agent"); and

(7)  BARCLAYS BANK PLC as security agent under the April 1998 Agreement (the
     "Security Agent").

NOW IT IS AGREED as follows:

1.  INTERPRETATION

1.1 Definitions
    In this Agreement, unless the context otherwise requires, the following
    expressions have the following meanings:

    "Accession Document" means an agreement substantially in the form set out in
    Schedule 9 pursuant to which a Group Company becomes a Borrower and/or a
    Guarantor under this Agreement.

    "Accounting Quarter" means each three month period ending on the last day of
    March, June, September and December in each Financial Year of the Parent.

    "Acquisition" bears the meaning given to it in the Bridge Facility
    Agreement.

    "Advance" means a Tranche A Advance or a Tranche B Advance.

    "Affiliated Bank" means:

    (a)   an institution which is, in relation to a Bank, its Subsidiary or its
          Holding Company or another Subsidiary of any such Holding Company; and

                                      -1-
<PAGE>

    (b)   whether or not within paragraph (a) above, with respect to any person,
          any other person (an "Affiliate") directly or indirectly controlling,
          controlled by, or under direct or indirect common control with, that
          person. A person shall be deemed to control another person if that
          person possesses, directly or indirectly, the power to direct or cause
          the direction of the management and policies of that other person,
          whether through the ownership of voting securities, by contract or
          otherwise.

    "Agents" means the Facility Agent and the Security Agent and "Agent" means
    either one of them.

    "Agency Fee Letter" means the letter from the Facility Agent to the
    Obligors' Agent dated 24 May 1999 setting out the amount of the agency fees
    payable under Clause 15.2 (Agency Fees).

    "Agreed Financial Projections" means the financial projections and forecasts
    for the Business in the agreed form.

    "April 1998 Agreed Financial Projections" means the financial projections
    and forecast for the Business in the agreed form provided in connection with
    the April 1998 Facility.

    "AOC" means The Associated Octel Company Limited (a company incorporated in
    England with registered number 344359).

    "AOC (Plant)" means Associated Octel Company (Plant) Limited (a company
    incorporated in England with registered number 873396).

    "Approved Accounting Principles" means those accounting principles,
    standards and practices which were used in the Latest Accounts.

    "Approved Bank" means any bank and/or financial institution which has been
    approved by the Facility Agent for the purposes of this definition.

    "April 1998 Agreement" means the $280,000,000 term loan and $20,000,000
    revolving credit facilities agreement dated 27 April 1998 made between Octel
    Corp. as parent, Octel Associates and others as borrowers and/or guarantors,
    Goldman Sachs International and Barclays Capital as joint arrangers and
    joint syndication agents, Barclays Bank PLC as provider of the Barclays
    facilities and Barclays Bank PLC as facility agent and security agent.

    "April 1998 Facilities" means the facilities provided under the April 1998
    Agreement.

    "April 1998 Tranche A Facility" means the term loan facility provided under
    the April 1998 Agreement.

    "Arrangement Fees Letter" means the letter from the Arranger to the
    Obligors' Agent dated 24 May 1999 setting out the amount of the arrangement
    fees payable under Clause 15.3 (Arrangement Fees).

                                      -2-
<PAGE>

    "Auditors" means Ernst & Young or such other firm of accountants as may be
    appointed in accordance with sub-clause 19.6.3.

    "Available Amount" means, in respect of any Accounting Quarter (the "current
    Account Quarter"), an amount equal to 50 per cent. of the aggregate amount
    of Surplus Cash Flow for each Accounting Quarter comprised in the
    Calculation Period relating to the current Accounting Quarter (provided that
    the amount of such Surplus Cash Flow shall (to the extent such amounts are
    included in Surplus Cash Flow) be reduced by the aggregate of all amounts
    which have been applied or are required to be applied in prepayment of the
    April 1998 Facilities in accordance with Clauses 14.1 (Voluntary Prepayments
    of Tranche A Facility) to 14.6 (Insurance) (inclusive) of the April 1998
    Agreement during that Calculation Period) less:

    (a)   the total cost of all acquisitions made in that Calculation Period in
          accordance with sub-clause 19.3.14(vi) (which for this purpose shall
          be the aggregate of the amounts specified in sub-clause 19.3.14(vi)
          (1) and (2) thereof in respect of the relevant acquisitions);

    (b)   the total cost of all Permitted Investments made in that Calculation
          Period (which for this purpose shall be the aggregate of the amounts
          specified in paragraph (b) of the definition of "Permitted Investment"
          in this Clause 1.1 in respect of the relevant Permitted Investments);

    (c)   the total amount applied in that Calculation Period in the making of
          Permitted Payments referred to in sub-clause 19.4.6(c)(v) of the
          definition of that term in sub-clause 19.4.6; and

    (d)   the aggregate amount of dividends paid (directly or indirectly) by the
          Parent during that Calculation Period and the aggregate amount of the
          consideration for the purchase by the Parent (directly or indirectly)
          of stock issued by the Parent paid during that Calculation Period, to
          the extent that the aggregate of all such amounts exceeds in respect
          of any Calculation Period, US$15,000,000.

    "Bank" means:

    (a)   when designated "Tranche A", an Original Bank identified in Schedule 1
          as participating in the Tranche A Facility; or

    (b)   when designated "Tranche B", an Original Bank identified in Schedule 1
          as participating in the Tranche B Facility,

    and, in each case, any Transferee to whom rights and/or obligations are
    assigned or transferred in accordance with Clause 29 (Changes to Parties)
    (until, in each case, its entire participation in the Facilities has been
    assigned or transferred to a Transferee in accordance with Clause 29
    (Changes to Parties)) (collectively, the "Banks").

    "Barclays Facilities" means the credit facilities made available by Barclays
    Bank PLC to AOC pursuant to the Barclays Facility Letter.

                                      -3-
<PAGE>

    "Barclays Facility Letter" means the facility letter entered into on or
    before the date of this Agreement in the agreed form between Barclays Bank
    PLC and AOC in respect of bonding, guarantee and indemnity and letter of
    credit facilities.

    "Bidco" means OBOAdler Company Limited incorporated in England and Wales.

    "Borrowers" means:

    (a)  AOC; and

    (b)   each Subsidiary of Octel Associates which becomes a borrower hereunder
          pursuant to Clause 5 (Borrowers under the Facilities) by executing an
          Accession Document,

    and "Borrower" means any one of them.

    "Bridge Facility Agreement" means the $90,000,000 term loan agreement of
    even date herewith between, inter alia, Barclays Capital and Bidco.

    "Business" means the petroleum additives, petroleum specialities,
    performance chemicals and related businesses carried on by the Borrower and
    other members of the Group.

    "Business Day" means a day (other than a Saturday or a Sunday) which is not
    a public holiday and on which banks are open for general business in London
    and, if on that day a payment is required to be made, in New York City also.

    "Calculation Period" means in relation to any Accounting Quarter, the period
    comprising the four Accounting Quarters immediately preceding that
    Accounting Quarter.

    "Capital Expenditure" means expenditure which should be treated as capital
    expenditure in the audited consolidated accounts of the Group in accordance
    with the Approved Accounting Principles.

    "Capital Stock" of any person means any and all shares, interests, rights to
    purchase, warrants, options, participations or other equivalents of or
    interests in (however designated) equity of such person, including any
    Preferred Stock, but excluding any debt securities convertible into such
    equity.

    "Cash Equivalents" means:

    (a)   marketable direct obligations issued by, or unconditionally guaranteed
          by, the United Kingdom Government or issued by any agency thereof and
          backed by the full faith and credit of the United Kingdom, in each
          case maturing within one year from the date of acquisition thereof;

    (b)   commercial paper maturing no more than one year from the date of
          creation thereof and, at the time of acquisition, having a rating of
          at least A-1 from S&P or at least P-1 from Moody's;

                                      -4-
<PAGE>

    (c)   certificates of deposit or bankers' acceptances maturing within one
          year from the date of acquisition thereof issued by any bank having a
          rating of at least A-1 from S&P or at least P-1 from Moody's;

    (d)   any investments in direct obligations of the United States government
          (or any agency thereof) or in obligations fully and unconditionally
          guaranteed by the United States government (or any agency thereof), in
          each case maturing within one year from the date of acquisition
          thereof; and

    (e)   investments in money market funds which invest substantially all their
          assets in securities of the types described in paragraphs (a) to (d)
          above.

    "Cashflow" has the meaning given to it in Clause 19.9 (Financial
    Definitions).

    "Change of Control" means the occurrence of any of the following events:

    (a)   any "person" (as such term is used in Sections 13(d) and 14(d) of the
          Exchange Act) is or becomes the "beneficial owner" (as defined in
          Rules 13d-3 and 13d-5 under the Exchange Act, except that, for the
          purposes of this paragraph (a), such person shall be deemed to have
          "beneficial ownership" of all shares that any such person has the
          right to acquire, whether such right is exercisable immediately or
          only after the passage of time), directly or indirectly, of more than
          40 per cent. of the total voting power of the Voting Stock of the
          Parent;

    (b)   individuals who on the date of this Agreement constitute the Board of
          Directors of the Parent (together with any new directors whose
          election by the Board of Directors of the Parent or whose nomination
          for election by the shareholders of the Parent was approved by a vote
          of 66 2/3 per cent. of the directors of the Parent then still in
          office who were either directors on the date of this Agreement or
          whose election or nomination for election was previously so approved),
          cease for any reason to constitute a majority of the Board of
          Directors of the Parent then in office;

    (c)   the merger or consolidation of the Parent with or into another person
          or the merger of another person with or into the Parent and, in the
          case of any such merger or consolidation, the securities of the Parent
          that are outstanding immediately prior to such transaction and which
          represent 100 per cent. of the aggregate voting power of the Voting
          Stock of the Parent are changed into or exchanged for cash, securities
          or property, unless pursuant to such transaction such securities are
          changed into or exchanged for, in addition to any other consideration,
          securities of the surviving corporation that represent immediately
          after such transaction, at least a majority of the aggregate voting
          power of the Voting Stock of the surviving corporation; or

    (d)   any change of control (or similar event, however designated) with
          respect to the Parent under and as defined in any indenture or
          agreement relating to Financial Indebtedness to which any Group
          Company is a party.

    "Commitment" means:

                                      -5-
<PAGE>

    (a)   when designated "Tranche A", in relation to an Original Bank and the
          Tranche A Facility, the amount set opposite its name in Schedule 1 in
          relation to the Tranche A Facility and, in relation to any other Bank,
          the amount or the total amount of the Tranche A Commitments
          transferred to it under a Substitution Certificate or Substitution
          Certificates or other document pursuant to which it becomes party to,
          or acquires rights and obligations under, this Agreement; and

    (b)   when designated "Tranche B", in relation to an Original Bank and the
          Tranche B Facility, the amount set opposite its name in Schedule 1 in
          relation to the Tranche B Facility and, in relation to any other Bank,
          the amount or the total amount of the Tranche B Commitments
          transferred to it under a Substitution Certificate or Substitution
          Certificates or other document pursuant to which it becomes party to,
          or acquires rights and obligations under, this Agreement,

    less, in any such case:

    (i)   that part thereof transferred by it in accordance with Clause 29
          (Changes to Parties); and

    (ii)  that part thereof which has been cancelled, reduced or terminated in
          accordance with this Agreement,

    and without any such designation means "Tranche A Commitment" and/or
    "Tranche B Commitment", as the context requires.

    "Computer System" means any computer hardware or software or any equipment
    operated by electronic means.

    "Conditional Sale Agreement" bears the meaning given to it in the Bridge
    Facility Agreement.

    "Constitutional Documents" means, in relation to Octel Associates, the
    Partnership Agreement, the Settlement Deed, the Managing Agency Agreement
    and the Leasing Agreement.

    "Corporate Services Transition Agreement" means the corporate services
    transition agreement dated on or before the date of the April 1998 Agreement
    between GLCC and AOC relating to the provision of services by the Parent and
    entered into pursuant to the Distribution Agreement.

    "Distribution" means the transfer of certain assets and properties of the
    Business by GLCC to the Parent and the distribution as a dividend to holders
    of common stock in GLCC of common stock in Octel Corp., in each case
    pursuant to the Distribution Documents.

    "Distribution Agreement" means the transfer and distribution agreement dated
    on or before the date of this Agreement between GLCC and Octel Corp.

    "Distribution Documents" means the Distribution Agreement, the Tax
    Disaffiliation Agreement, the Corporate Services Transition Agreement, the
    Supply and Toll Manufacturing Agreements, the Joint Representation and
    Defense Agreement, the

                                      -6-
<PAGE>

    Ellesmere Port Lease Agreement and all other documents, agreements,
    transfers, instruments and certificates executed pursuant to the
    Distribution Agreement.

    "Dollars" or "$" means the lawful currency for the time being of the United
    States of America.

    "Dormant Company" means a member of the Group which:

    (a)   during the most recently ended Financial Year was dormant within the
          meaning of section 250(3) of the Companies Act 1985 (which, for the
          purposes of this definition, shall be deemed to apply to any body
          corporate, wherever incorporated);

    (b)   has not entered into any significant accounting transaction (for the
          purposes of that section) since the end of that Financial Year; and

    (c)   the Obligors' Agent demonstrates to the satisfaction of the Facility
          Agent does not own assets with an aggregate realisable value greater
          than $50,000 (or its equivalent in other currencies) and has no
          material liabilities.

    "EBITDA" has the meaning given to it in Clause 19.9 (Financial Definitions).

    "Ellesmere Port Lease Agreement" means the Ellesmere Port lease agreement
    dated on or before the date of this Agreement between GLCC and AOC relating
    to the site at Ellesmere Port and entered into pursuant to the Distribution
    Agreement.

    "Employee Share Scheme" means any arrangement or scheme for the remuneration
    or incentivisation of employees and/or officers of any Group Company by way
    of issue of stock of the Parent or the grant of any rights to receive,
    acquire or sell stock of the Parent in the future.

    "Environment" means all gases, air, vapors, liquids, water, land, surface
    and sub-surface soils, rock, flora, fauna, wetlands and all other natural
    resources or part thereof including artificial or man-made buildings,
    structures or enclosures.

    "Environmental Approval" means any permit, license, authorisation, consent
    or other approval required under or in relation to Environmental Laws.

    "Environmental Laws" means all European Union, foreign, national, federal,
    state or local statutes, orders, regulations or other law or subordinate
    legislation or common law or regulatory codes of practice concerning the
    Environment or health and safety which are in existence now or in the future
    and are binding upon any Group Company in the relevant jurisdiction in which
    the relevant Group Company has been or is operating (including by the export
    of its products or its waste thereto).

    "Environmental Report" shall bear the same meaning in this Agreement as it
    bears in the April 1998 Agreement.

    "ERISA" means the Employee Retirement Income Security Act of 1974 of the
    United States of America as amended from time to time, or any successor
    statute and any regulations promulgated thereunder.

                                      -7-
<PAGE>

    "ERISA Affiliate" means, as applied to any person, any trade or business
    (whether or not incorporated) that, together with such person, is treated as
    a single employer under Section 414(b) or (c) of the Internal Revenue Code
    or, solely for purposes of Section 302 or ERISA and Section 412 of the
    Internal Revenue Code, is treated as single employer under Section 414 of
    the Internal Revenue Code.

    "ERISA Event" means (a) a "reportable event" within the meaning of Section
    4043 of ERISA and the regulations issued thereunder with respect to any
    Pension Plan (excluding those for which the provision for 30-day notice to
    the PBGC has been waived by regulation); (b) the existence with respect to
    any Pension Plan of an "accumulated funding deficiency" (as defined in
    Section 412 of the Internal Revenue Code or Section 302 or ERISA), whether
    or not waived; (c) the filing pursuant to Section 412(d) of the Internal
    Revenue Code or Section 303(d) of ERISA of an application for a waiver of
    the minimum funding standard with respect to any Pension Plan; (d) the
    incurrence by any Obligor or any of its ERISA Affiliates of any liability
    under Title IV of ERISA with respect to the termination of any Pension Plan;
    (e) the receipt by any Obligor or any of its ERISA Affiliates from the U.S.
    Pension Benefit Guaranty Corporation (or any successor entity under ERISA)
    or a plan administrator of any notice relating to an intention to terminate
    any Pension Plan or Pension Plans or to appoint a trustee to administer any
    Pension Plan; (f) the incurrence by any Obligor or any of its ERISA
    Affiliates of any liability with respect to the withdrawal or partial
    withdrawal from any Pension Plan or Multiemployer Plan; or (g) the receipt
    by any Obligor or any of its ERISA Affiliates of any notice, or the receipt
    by any Multiemployer Plan from such Obligor or any of its ERISA Affiliates
    of any notice concerning the imposition of "Withdrawal Liability" or a
    determination that a Multiemployer Plan is, or is expected to be, insolvent
    or in reorganisation, in each case within the meaning of Title IV of ERISA.

    "Event of Default" means any of the events specified in Clause 20.1 (List of
    Events).

    "Exchange Act" means the Securities Exchange Act of 1934 of the United
    States of America.

    "Facilities" means the Tranche A Facility and the Tranche B Facility and
    "Facility" means either one of them.

    "Facility Agent's $ Spot Rate of Exchange" means, in relation to a currency
    other than Dollars and on any day, the spot rate of exchange of the Facility
    Agent (as determined by the Facility Agent) for the purchase of the
    appropriate amount of that currency with Dollars in the London foreign
    exchange market in the ordinary course of business at or about 10.00 a.m. on
    the day in question for delivery two Business Days thereafter.

    "Final Maturity Date" means 31 December 2002.

    "Finance Co." means OBOAdler Finance Limited, incorporated in England and
    Wales.

    "Finance Documents" means this Agreement, each Security Document, the
    Syndication Agreement, each Accession Document, each Substitution
    Certificate, the Arrangement Fees Letter, the Agency Fees Letter, any
    Hedging Agreement and each of the other

                                      -8-
<PAGE>

    Finance Documents as defined in the April 1998 Agreement and "Finance
    Document" means any of them.

    "Finance Parties" means the Arranger, the Agent, the Security Agent and each
    Bank and "Finance Party" means any one of them.

    "Financial Indebtedness" means any indebtedness in respect of or arising
    under or in connection with:

    (a)  moneys borrowed (including overdrafts); or

    (b)  any debenture, bond, note or loan stock or other similar instrument;
         or

    (c)  any acceptance or documentary credit; or

    (d)  receivables sold or discounted (otherwise than on a non-recourse
         basis); or

    (e)  the acquisition cost of any asset or service to the extent payable
         after the time of acquisition or possession by the person liable as
         principal obligor for the payment thereof, where the deferred payment
         is either:

         (i)  arranged primarily as a method of raising finance or financing or
              refinancing the acquisition of the asset acquired; or

         (ii) paid more than six months after the date for acquisition or
              supply (as appropriate) of that asset or service; or

    (f)  the sale price of any asset to the extent paid before the time of sale
         or delivery by the person liable to effect such sale or delivery,
         where the advance payment is arranged primarily as a method of raising
         finance or financing or refinancing the manufacture, assembly,
         acquisition or holding of the asset to be sold; or

    (g)  finance leases, credit sale or conditional sale agreements; or

    (h)  any agreement for managing or hedging currency and/or interest rate
         and/or commodity risk whether by way of forward exchange, cap, collar,
         swap, forward rate agreement or otherwise or any other derivative
         transaction, provided however, that the amount of indebtedness taken
         into account under this paragraph (h) in relation to a person at a
         given time shall be the amount (if any) which would be payable by that
         person to the relevant counterparty under that agreement or
         transaction if it were terminated and/or closed out at the time of
         determination or, as the case may be, if it has already been
         terminated and/or closed out, the aggregate amount payable thereunder;
         or

    (i)  the amount payable under any put option or other arrangement (other
         than an Employee Share Scheme) whereby any member of the Group is
         liable, at the request of a third party, to purchase share capital or
         other securities issued by it or any other member of the Group; or

    (j)  the amount payable by any member of the Group in respect of the
         redemption of any share capital or other securities issued by it or
         any other member of the

                                      -9-
<PAGE>

         Group (if the share capital or other securities are redeemable at the
         option of their holder or if the relevant member of the Group is
         otherwise obliged, or may on the occurrence of any event or
         circumstance become otherwise obliged, to redeem them on or before the
         Final Maturity Date); or

    (k)  amounts raised under any other transaction having the commercial
         effect of a borrowing; or

    (l)  any guarantee, indemnity or similar assurance against financial loss
         of any person;

    and so that, where the amount of Financial Indebtedness falls to be
    calculated, no amount shall be taken into account more than once in the same
    calculation.

    "Financial Year" means the period of 12 months ending on 31 December in each
    year.

    "Form 10" means the Form 10 statement filed pursuant to section 12(b) or (g)
    of the Exchange Act on 21 April 1998 on behalf of the Parent in connection
    with the Distribution.

    "FTC" means the U.S. Federal Trade Commission.

    "GLCC" means Great Lakes Chemical Corporation, a corporation organised under
    the laws of the State of Delaware, USA.

    "GLE" means Great Lakes Europe Limited (a company incorporated in England
    with registered number 250695).

    "Group" means the Parent and its Subsidiaries from time to time and "member
    of the Group" or "Group Company" means any one of them.

    "Guarantors" means:

    (a)  each Group Company which is listed in Part A of Schedule 2; and

    (b)  any Group Company which becomes a guarantor under this Agreement
         pursuant to Clause 16.3 (Further Guarantors) by executing an Accession
         Document,

    and "Guarantor" means any of them.

    "Hedging Agreements" means agreements entered into with the Hedging Banks
    for the purpose of managing or hedging interest rate risk in relation to the
    April 1998 Facilities or the Facilities, whether by way of forward exchange,
    cap, collar, swap, forward rate agreement or otherwise;

    "Hedging Bank" means any Bank in its capacity as provider of interest rate
    hedging in relation to the April 1998 Facilities or the Facilities.

    "Holding Company" means an entity of which another person is a Subsidiary.

    "Intellectual Property" means the Intellectual Property Rights owned by
    members of the Group throughout the world or the interests of any member of
    the Group in any of the

                                      -10-
<PAGE>

    foregoing, together with the benefit of all agreements entered into or the
    benefit of which is enjoyed by any member of the Group relating to the use
    or exploitation of any of the aforementioned rights;

    "Intellectual Property Rights" means all patents and patent applications,
    trade and service marks and trade and/or service mark applications (and all
    goodwill associated with such applications), all brand and trade names, all
    copyrights and rights in the nature of copyright, all design rights, all
    registered designs and applications for registered designs, all trade
    secrets, know-how and all other intellectual property rights;

    "Intercompany Loans" shall bear the same meaning in this Agreement as it
    bears in the April 1998 Agreement.

    "Intercompany Loan Agreements" means:

    (a)  the intercompany loan agreement in the agreed form dated on or before
         the date of this Agreement between Octel Developments and Octel
         Trading; and

    (b)  the intercompany loan agreement in the agreed form dated on or before
         the date of this Agreement between Octel Trading and Octel Associates.

    "Interest Period" means a period by reference to which interest is
    calculated and payable on an Advance or overdue amount.

    "Internal Revenue Code" means the Internal Revenue Code of 1986 of the
    United States of America.

    "Joint Representation and Defense Agreement" means the joint representation
    and defense agreement dated on or before the date of this Agreement between
    GLCC and the Parent relating to potential litigation issues and entered into
    pursuant to the Distribution Agreement.

    "Key Properties" means:

    (a)  the freehold and leasehold land and premises at Oil Sites Road,
         Ellesmere Port, Cheshire comprised in freehold title number CH363860,
         leasehold title number CH403291, and various unregistered conveyances;
         and

    (b)  freehold land and buildings at Watling Street, Bletchley,
         Buckinghamshire registered under title number WA622018.

    "Latest Accounts" means the audited consolidated financial statements of the
    Parent for the period year ended 31 December 1998.

    "Latest Interim Accounts" means the unaudited consolidated financial
    statements of the Parent for the three months ended 31 March 1999 (as set
    out in the Parent's quarterly report on Form 10-Q for that period filed with
    the SEC).

    "Leasing Agreement" means the leasing agreement dated 15 April 1966 between
    AOC (Plant) and The Shell Company of the United Kingdom Limited, BP Trading
    Limited, Caltex (UK) Limited and Mobil Transportation Company Limited.

                                      -11-
<PAGE>

    "Lending Office" means, in relation to a Bank, the office through which it
    is acting for the purposes of this Agreement (which, subject to Clause 3.2
    (Lending Office), will be the office set opposite the name of that Bank in
    Schedule 1 or the office notified by that Bank to the Facility Agent when it
    becomes a Bank).

    "LIBOR" means, in relation to an Advance or overdue amount and any Interest
    Period relating thereto:

    (a)  the rate per annum of the offered quotation for deposits in the
         currency of that Advance or unpaid sum (as the case may be) in an
         amount equal or comparable to such Advance or unpaid sum (as the case
         may be) for the duration of the relevant Interest Period which appears
         on Telerate Page 3750 at or about 11.00 a.m. on the applicable Rate
         Fixing Day; or

    (b)  if no such offered quotation appears on Telerate Page 3750 at or about
         11.00 a.m. on the applicable Rate Fixing Day:

         (i)  the arithmetic mean (rounded up, if necessary, to four decimal
              places) of the respective rates (as quoted to the Facility Agent
              at its request) offered by the Reference Banks to leading banks
              in the London interbank market at or about 11.00 a.m. on the
              applicable Rate Fixing Day for deposits in the currency of that
              Advance or overdue amount in an amount equal or comparable to
              that Advance or overdue amount (as the case may be) for the
              duration of the relevant Interest Period; or

         (ii) subject to sub-clause 9.1.3, if any Reference Bank does not
              provide a quote as contemplated by paragraph (i), the relevant
              arithmetic mean determined on the basis of the quotations
              supplied by the remaining Reference Banks.

    For the purposes of this definition, "Telerate Page 3750" means the display
    designated as "Telerate Page 3750" on the Telerate Service (or such other
    page as may replace Page 3750 on that service or such other service as may
    be nominated by the British Bankers' Association as the information vendor
    for the purpose of displaying British Bankers' Association Interest
    Settlement Rates for deposits in dollars).

    "Majority Banks" means, at any time:

    (a)  Banks whose Commitments at that time aggregate more than 66 2/3 per
         cent of the Total Commitments at that time; or

    (b)  if the Total Commitments have been reduced to zero, Banks whose
         Commitments aggregated more than 66 2/3 per cent of the Total
         Commitments immediately before the reduction.

    "Management" means the individuals listed in the paragraph headed "Executive
    Officers" of the section headed "Management of the Company" in the Form 10.

                                      -12-
<PAGE>

    "Managing Agency Agreement" means the managing agency agreement dated 15
    April, 1966 between The Shell Company of the United Kingdom Limited, BP
    Trading Limited, Caltex (UK) Limited, Mobil Transportation Company Limited
    and AOC.

    "Mandatory Costs Rate" means, in relation to each Advance or Unpaid Sum, the
    rate from time to time determined in accordance with Schedule 5 (Mandatory
    Costs Rate).

    "Margin" means (a) 1.50 per cent per annum from the date hereof until the
    date upon which the aggregate amount outstanding under the April 1998
    Tranche A Facility plus the aggregate of the undrawn Commitments and the
    outstanding Advances under this Agreement is less than US$140,000,000 and
    (b) thereafter 1.25%.

    "Material Adverse Effect" means any effect, event or matter:

    (a)  which is, or is reasonably likely to be, materially adverse to:

         (i)  the business, assets, operations or financial condition of the
              Group (taken as a whole); or

         (ii) the ability of any Obligor to perform in a timely manner any of
              its material obligations (including without limitation its
              payment obligations and its obligations under Clause 19.7
              (Financial Covenants)) under any of the Finance Documents; or

    (b)  which results in any of the rights or obligations arising under the
         Finance Documents not being legal, valid and binding on and
         enforceable against any party thereto and/or, in the case of any
         Security Documents, not providing to the Security Agent (on behalf of
         itself and the other Finance Parties) perfected enforceable security
         over the assets expressed to be secured under the Security Documents,
         in each case to an extent or in a manner reasonably considered by the
         Majority Banks to be materially adverse to their interests under the
         Finance Documents.

    "Material Group Company" means:

    (a)  each Obligor;

    (b)  any other Subsidiary of the Parent:

         (i)   the net worth of which accounts for more than five per cent of
               the consolidated net worth of the Group; and/or

         (ii)  the profit from ordinary activities before interest, taxation and
               exceptional items of which accounts for more than five per cent
               of the consolidated profit from ordinary activities before
               interest, taxation and exceptional items of the Group; and/or

         (iii) the turn-over of which (excluding sales to other members of the
               Group) accounts for more than five per cent of the consolidated
               gross turn-over of the Group,

                                      -13-
<PAGE>

    and for this purpose the calculation of net worth, profit from ordinary
    activities before interest, taxation and exceptional items and turn-over
    shall:

         (iv)  be made in accordance with US GAAP;

         (v)   in the case of a company which itself has Subsidiaries, be made
               by using the consolidated net worth, profit from ordinary
               activities before interest, taxation and exceptional items or
               turn-over, as the case may be, of it and its Subsidiaries; and

         (vi)  be determined by reference to:

               (1)  the latest accounts of the relevant company used for the
                    purposes of the then latest audited annual financial
                    statements of the Group delivered by the Parent under
                    sub-clause 19.6.4 (Financial Statements); or

               (2)  if the relevant company becomes a Subsidiary of the Parent
                    after the end of the Financial Year to which those latest
                    audited annual financial statements of the Group relate, the
                    latest accounts of that Subsidiary; or

    (c)  any Subsidiary of the Parent to which has been transferred (whether by
         one transaction or a series of transactions, related or not) the whole
         or substantially the whole of the assets of a Subsidiary of the Parent
         which immediately prior to those transactions was a Material Group
         Company.

    "Material Insurances" means the following insurance policies of the Group:

    (a)  all policies relating to property damage and business interruption;

    (b)  all policies relating to employer's liability and/or public/products
         liability;

    (c)  all policies relating to marine insurance (including, without
         limitation, cargo loss) (other than foul berth insurance); and

    (d)  any other policy entered into after the date of this Agreement which
         the Facility Agent (acting reasonably) considers material in the
         context of the Finance Documents.

    "Multiemployer Plan" means a multiemployer plan as defined in Section
    4001(a)(3) of ERISA.

    "Obligors" means each Borrower, each Guarantor, the Obligors' Agent and each
    other Group Company which has undertaken (or in the future undertakes)
    obligations to any Finance Party pursuant to any Finance Document and
    "Obligor" means any of them.

    "Obligors' Agent" means AOC appointed to act on behalf of each Obligor in
    relation to the Finance Documents pursuant to Clause 5.4 (Obligors' Agent),
    or such other Group Company located in the United Kingdom as shall be
    appointed pursuant to sub-clause 5.4.3 on behalf of each Obligor.

                                      -14-
<PAGE>

    "Octel America" means Octel America Inc., a corporation organised under the
    laws of the State of Delaware, U.S.A.

    "Octel Associates" means the Partners in their capacity as partners of the
    partnership trading in the United Kingdom under the name of Octel
    Associates.

    "Octel Developments" means Octel Developments PLC (formerly Hamsard One
    Thousand and Seventy Four Limited) (a company incorporated in England with
    registered number 3516662).

    "Operating Budget" means, in relation to each Financial Year of the Parent,
    a budget comprising projected balance sheet, projected profit and loss
    account and projected cashflow statement (including details of projected
    Capital Expenditure) for the Group for that Financial Year delivered to the
    Facility Agent pursuant to sub-clause 19.6.4 (Financial Statements).

    "Operating Properties" means all real property (including, without
    limitation, all buildings, fixtures or other improvements located thereon)
    now, hereafter or heretofore owned, leased, operated or used by any Group
    Company or any of their respective predecessors or affiliates.

    "Part Owned Entity" means any limited liability company which is not a
    wholly-owned Subsidiary of Octel Resources and in relation to which Octel
    Resources directly or indirectly owns in excess of 25 per cent. of the
    ordinary share capital.

    "Partnership Agreement" means the agreement dated 15 April 1966 relating to
    the establishment and operation of the partnership trading in the United
    Kingdom under the name of Octel Associates, which was originally entered
    into by The Shell Company of the United Kingdom Limited, BP Trading Limited,
    Caltex (UK) Limited and Mobil Transportation Company Limited.

    "Payment Blockage Period" has the meaning given to that expression in the
    draft Senior Note Documents in the agreed form as delivered to the Facility
    Agent under paragraph 3 of Schedule 3 of the April 1998 Agreement.

    "Pension Plan" means any employee benefit plan, other than a Multiemployer
    Plan, which is subject to the provisions of Title IV of ERISA or Section 412
    of the Internal Revenue Code or Section 302 or ERISA, and in respect of
    which any Obligor or any of its ERISA Affiliates is (or, if such plan were
    terminated, would under Section 4069 of ERISA be deemed to be) an "employer"
    as defined in Section 3(5) of ERISA.

    "Permitted Guarantee" means any guarantee falling within the provisions of
    sub-clauses 19.3.9(a) to (e) (inclusive).

    "Permitted Indebtedness" means any indebtedness falling within the
    provisions of sub-clauses 19.3.8(a) to (h) (inclusive).

    "Permitted Investment" means any investment (whether by way of loan,
    subscription of share capital, incurrence of any liability or otherwise) by
    Octel Resources or a wholly-owned Subsidiary of Octel Resources in a Part
    Owned Entity, provided that:

                                      -15-
<PAGE>

    (a)  such investment is in a business similar to, connected with, or
         related to the development of the Business; and

    (b)  after the date of this Agreement, the aggregate (without
         double-counting) of:

         (i)   any amount advanced, lent, contributed or subscribed for, or
               otherwise invested in, such Part Owned Entity by any member of
               the Group during an Accounting Quarter; and

         (ii)  the market value of any asset transferred (other than by way of a
               transfer permitted under this Agreement) or contributed to such
               Part Owned Entity by any member of the Group during an Accounting
               Quarter; and

         (iii) the maximum liability under any guarantee given by any member of
               the Group during an Accounting Quarter in respect of any
               Financial Indebtedness incurred (whether by way of guarantee or
               otherwise) by such Part Owned Entity,

         shall not exceed the Unutilised Available Amount in respect of that
         Accounting Quarter at the relevant time.

    "Permitted Payment" has the meaning given to it in sub-clause 19.4.6.

    "Permitted Security Interest" means any Security Interest falling within the
    provisions of sub-clauses 19.3.6(a) to (i) (inclusive).

    "Potential Event of Default" means any event which, with the giving of
    notice, the lapse of time, the making of any determination or the fulfilment
    of any other applicable condition (or any combination of any of the
    foregoing), in each case provided for in Clause 20.1 (List of Events), would
    constitute an Event of Default.

    "Preferred Stock", as applied to the Capital Stock of any person, means
    Capital Stock of any class or classes (however designated) which is
    preferred as to the payment of dividends or distributions, or as to the
    distribution of assets upon any voluntary or involuntary liquidation or
    dissolution of such person, over shares of Capital Stock of any other class
    of such person.

    "Qualifying Bank" means, at any time a bank or financial institution which,
    at that time:

    (a)  is a bank as defined in section 840A of the Income and Corporation
         Taxes Act 1988 for the purposes of section 349 of that Act and which
         is within the charge to UK corporation tax as respects, and is
         beneficially entitled to, the interest payable or paid to it under
         this Agreement; or

    (b)  does not carry on business in the United Kingdom through a permanent
         establishment with which indebtedness in respect of which interest is
         paid is effectively connected and which has its Lending Office outside
         the United Kingdom and to which Lending Office payments of interest
         under this Agreement can be made without any deduction or withholding
         for on account of Taxes by reason of an applicable taxation treaty
         between the United Kingdom

                                      -16-
<PAGE>

         and the country in which that bank or financial institution is, or is
         treated as, resident (as such term is defined in the appropriate
         treaty) (a "Treaty Bank").

    "Rate Fixing Day" means in respect of any Interest Period the day on which
    quotations would ordinarily be given by prime banks in the London Interbank
    Market for deposits in Dollars for delivery on the first day of the relevant
    Interest Period.

    "Reference Banks" means the principal London offices of Barclays Bank PLC,
    Lloyds Bank Plc and National Westminster Bank plc or such other banks or
    financial institutions as may be appointed from time to time by the Facility
    Agent (following consultation with the Obligors' Agent).

    "Repayment Dates" means each date on which an instalment is due for
    repayment under Clause 10.1 (Repayment) and the Final Maturity Date.

    "Security Documents" means each of the security documents specified in Part
    B of Schedule 2 to the April 1998 Agreement and in Part B of Schedule 2
    hereof and all other documents which create, evidence or grant a Security
    Interest in favour of any Finance Party in respect of the obligations of any
    Obligor under any Finance Document and "Security Document" means any one of
    them.

    "Security Interest" means any mortgage, charge (fixed or floating), pledge,
    lien, hypothecation, right of set-off, security trust, assignment by way of
    security, reservation of title, or any other security interest whatsoever,
    howsoever created or arising or any other agreement or arrangement
    (including, without limitation, a sale and repurchase arrangement) having
    the commercial effect of conferring security and any agreement to enter
    into, create or establish any of the foregoing.

    "Senior Note Documents" shall bear the same meaning in this Agreement as it
    bears in the April 1998 Agreement.

    "Senior Note Indenture" shall bear the same meaning in this Agreement as it
    bears in the April 1998 Agreement.

    "Senior Noteholders" shall bear the same meaning in this Agreement as it
    bears in the April 1998 Agreement.

    "Senior Notes" shall bear the same meaning in this Agreement as it bears in
    the April 1998 Agreement.

    "Settlement Deed" means the settlement deed dated 4 February, 1997 between
    GLCC, GLE, Great Lakes Chemical (Europe) Limited, BP Oil UK Limited, The
    Dominion Motor Spirit Co., Limited, Dorchester Oil Trading Company Limited,
    Mobil Coatings Limited, Mobil Holdings (UK) Limited, Texaco Limited, Texaco
    International Trader Inc., Team Fuels Limited, The British Petroleum
    Company, Mobil Corporation and Texaco Inc.

    "Structure Document" shall bear the same meaning in this Agreement as in the
    April 1998 Agreement.

                                      -17-
<PAGE>

    "Subordination Deed" shall bear the same meaning in this Agreement as in the
    April 1998 Agreement.

    "Subsidiary" means:

    (a)  a subsidiary as defined in section 736 of the Companies Act 1985;

    (b)  a subsidiary undertaking as defined in section 258 of the Companies
         Act 1985; or

    (c)  whether or not falling within paragraph (a) or (b) above, in relation
         to any person, any entity which is controlled directly or indirectly
         by that person and any entity (whether or not so controlled) treated
         as a subsidiary in the latest financial statements of that person from
         time to time, and "control" for this purpose means the direct or
         indirect ownership of the majority of the voting share capital of such
         entity or the right or ability to determine the composition of a
         majority of the board of directors (or like board) of such entity, in
         each case whether by virtue of ownership of share capital, contract or
         otherwise.

    For the avoidance of doubt, for the purposes of the Finance Documents
    (except where the context requires otherwise):

    (i)  Octel Associates shall be deemed to be a Subsidiary of Octel Resources
         and AOC shall be deemed to be a Subsidiary of Octel Associates; and

    (ii) any wholly-owned Subsidiary of Octel Associates shall be deemed to be
         a wholly-owned Subsidiary of Octel Trading.

    "Substitution Certificate" means a certificate substantially in the form set
    out in Schedule 6.

    "Supply and Toll Manufacturing Agreements" means the various supply
    agreements and the toll manufacturing agreement dated on or before the date
    of this Agreement between GLCC and AOC relating to the supply by GLCC to AOC
    and/or the toll manufacturing by GLCC for AOC of certain products and
    entered into pursuant to the Distribution Agreement.

    "Surplus Cash Flow" means, in respect of any Accounting Quarter of the
    Parent, Cashflow less Total Debt Service of the Group for that Accounting
    Quarter (and, for the purpose of this definition, the relevant testing
    period for calculating Cashflow and Total Debt Service shall be that
    Accounting Quarter).

    "Syndication" has the meaning given to it in sub-clause 3.5.1.

    "Syndication Agreement" means the syndication agreement substantially in the
    form set out in Schedule 11.

    "Syndication Date" means the earlier of:

    (a)  the date the Facility Agent notifies the Obligors' Agent and the
         Finance Parties that Syndication has been completed; and

                                      -18-
<PAGE>

    (b)  the date falling 3 months after the date of the second Advance under
          this Agreement.

    "Syndication Information Memorandum" means a syndication information
    memorandum agreed between the Obligors' Agent and the Facility Agent as
    contemplated by sub-clause 3.5.3.

    "Target Shares" bears the meaning given it in the Bridge Facility Agreement.

    "Tax Disaffiliation Agreement" means the tax disaffiliation agreement dated
    on or before the date of the April 1998 Agreement between GLCC and the
    Parent relating to their respective obligations concerning various tax
    liabilities and entered into pursuant to the Distribution Agreement.

    "Tax on Overall Net Income" means, in respect of a person, any Tax (other
    than Tax deducted or withheld from any payment) imposed on that person in
    any jurisdiction on:

    (a)  the net income, profits or gains of that person worldwide; or

    (b)  such of its income, profits or gains as arise in or relate to the
         jurisdiction in which it is resident or in which its principal office
         (and/or its Lending Office) is located.

    "Taxes" means all income and other taxes, levies, imposts, deductions,
    charges, duties and withholdings in the nature of or on account of tax,
    together with interest thereon and penalties and fines with respect thereto,
    if any, and any payments made on or in respect thereof and "Tax" and
    "Taxation" shall be construed accordingly.

    "Total Commitments" means, at any time, the aggregate of all of the
    Commitments at that time.

    "Total Debt" has the meaning given to it in Clause 19.9 (Financial
    Definitions).

    "Total Debt Service" has the meaning given to it in Clause 19.9 (Financial
    Definitions).

    "Tranche A Advance" means the advance of $10,000,000 (as from time to time
    consolidated, divided or reduced by repayment or cancellation in accordance
    with the terms hereof) made or to be made by the Banks under the Tranche A
    Facility.

    "Tranche B Advance" means the advance of up to $90,000,000 (as from time to
    time consolidated, divided or reduced by repayment or cancellation in
    accordance with the terms hereof) made or to be made by the Banks under the
    Tranche B Facility.

    "Tranche A Availability Period" means the period commencing on the date
    hereof and terminating on the final day of the Availability Period as
    defined in the Bridge Facility Agreement.

    "Tranche B Availability Period" means the period commencing on the date
    hereof and terminating on (and including) the Repayment Date as defined in
    the Bridge Facility Agreement.


                                      -19-
<PAGE>

    "Tranche A Facility" means the term loan facility to be made available by
    the Tranche A Banks pursuant to sub-clause 2.2.1.

    "Tranche B Facility" means the term loan facility to be made available by
    the Tranche B Banks pursuant to sub-clause 2.2.2.

    "Transaction Costs" means all fees, costs and expenses and stamp,
    registration, value added and similar taxes incurred by any member of the
    Group for the purpose of and/or in connection with the Distribution and its
    financing (including, without limitation, advisory fees and other fees in
    relation to the Senior Notes) in an aggregate amount not exceeding
    $17,000,000 (or its equivalent in other currencies).

    "Transaction Documents" means the Finance Documents, the Distribution
    Documents, the Senior Note Documents, the Intercompany Loan Agreements and
    the Constitutional Documents.

    "Transferee" has the meaning given to it in sub-clause 29.2.1.

    "Treaty Bank" has the meaning given to it in the definition of "Qualifying
    Bank" in this Clause 1.1.

    "UK GAAP " means accounting principles and practices generally accepted from
    time to time in the United Kingdom.

    "Unutilised Available Amount" means, in respect of any Accounting Quarter,
    the Available Amount for that Accounting Quarter, less:

    (a)  the total cost of all acquisitions made in that Accounting Quarter in
         accordance with sub-clause 19.3.14(vi) (which for this purpose shall
         be the aggregate of the amounts specified in sub-clause 19.3.14(vi)(1)
         and (2) thereof in respect of the relevant acquisitions);

    (b)  the total cost of all Permitted Investments made in that Accounting
         Quarter (which for this purpose shall be the aggregate of the amounts
         specified in paragraph (b) of the definition of "Permitted Investment"
         in this Clause 1.1 in respect of the relevant Permitted Investments);

    (c)  the total amount already applied in that Accounting Quarter in the
         making of Permitted Payments referred to in sub-clause (C)(v) of the
         definition of that term in sub-clause 19.4.6; and

    (d)  the aggregate amount of dividends paid (directly or indirectly) by the
         Parent during that Accounting Quarter and the aggregate amount of the
         consideration for the purchase by the Parent (directly or indirectly)
         of stock issued by the Parent paid during that Accounting Quarter.

    "US" means the United States of America.

    "US GAAP " means accounting principles and practices generally accepted from
    time to time in the United States of America.

                                      -20-
<PAGE>

    "Utilisation" means a utilisation by a Borrower of the Tranche A Facility or
    the Tranche B Facility, as the case may be.

    "Utilisation Date" means, in relation to a Utilisation, the date for the
    making of that Utilisation, as specified by the relevant Borrower in the
    relevant Utilisation Request.

    "Utilisation Request" means a notice requesting an Advance in the form set
    out in Schedule 4.

    "Voting Stock" of a person means all classes of Capital Stock or other
    interests (including partnership interests) of such person then outstanding
    and normally entitled (without regard to the occurrence of any contingency)
    to vote in the election of directors, managers or trustees thereof.

    "Year 2000 Compliant" means, in relation to any Computer System, that any
    reference to or use of a date before, on or after 31 December 1999 in
    operation of that Computer System will not have a material adverse effect on
    the use of that Computer System.

1.2 Construction
    In this Agreement, unless the context otherwise requires, a reference to:

    1.2.1 an "agency" of a state includes any local, district, highway or other
          authority, self-regulating or other recognised body or designated
          agency, central or federal bank, department, government, legislature,
          minister, ministry, self-regulatory organisation, official, or public
          or statutory person (whether autonomous or not) of, or of the
          government of, that state or any political sub-division in or of that
          state;

    1.2.2 a document being in "the agreed terms" or "in the agreed form" means
          in a form agreed between the Obligors' Agent and the Facility Agent;

    1.2.3 an "agreement" includes any legally binding arrangement, concession,
          contract, deed or franchise (in each case whether oral or written);

    1.2.4 "assets" includes property and rights of every kind, present, future
          and contingent (including uncalled share capital) and every kind of
          interest in an asset;

    1.2.5 a "consent" includes an authorisation, approval, exemption, licence,
          order or permission (and reference to obtaining "consents" shall be
          construed accordingly);

    1.2.6 a "filing" includes any filing, registration, recording or notice
          (and references to making or renewing "filings" shall be construed
          accordingly);

    1.2.7 a "guarantee" includes:

          (a)  an indemnity; and

          (b)  any other obligation (whatever called (including without
               limitation a performance bond)) of any person:

                                      -21-
<PAGE>

               (i)  to pay, purchase, provide funds (whether by the advance of
                    money, the purchase of or subscription for shares or other
                    investments, the purchase of assets or services, the making
                    of payments under an agreement or otherwise) for the payment
                    of, indemnify against the consequences of default in the
                    payment of, or otherwise be responsible for, any
                    indebtedness of any other person; or

               (ii) to be responsible for the performance of any obligations by
                    or the solvency of any other person,

          (and "guaranteed" and "guarantor" shall be construed accordingly);

    1.2.8 "indebtedness" includes any obligation (whether incurred as
          principal, guarantor or as surety) for the payment or repayment of
          money, whether present or future, actual or contingent;

    1.2.9 a "month" means a period starting on one day in a calendar month and
          ending on the numerically corresponding day in the next calendar month
          provided that if:

          (a)  any such period would otherwise end on a day which is not a
               Business Day, it shall end on the next Business Day in the same
               calendar month or, if none, on the preceding Business Day; and

          (b)  a period starts on the last Business Day in a calendar month or
               if there is no numerically corresponding day in the month in
               which that period ends, that period shall end on the last
               Business Day in that later month,

          (and references to "months" shall be construed accordingly);

   1.2.10 a "person" includes any person, individual, firm, company,
          corporation, partnership, government, state or agency of a state or
          any undertaking (within the meaning of section 259(1) of the Companies
          Act 1985) or other association (whether or not having separate legal
          personality) or any two or more of the foregoing;

   1.2.11 "reservations" means (a) the principle that equitable remedies are
          remedies which may be granted or refused at the discretion of the
          court, (b) the limitation on enforcement as a result of laws relating
          to bankruptcy, insolvency, liquidation, reorganisation, court schemes,
          moratoria, administration and other laws generally affecting the
          rights of creditors generally, (c) the principle that certain types of
          security expressed to take effect as fixed security may, as a result
          of the ability of an Obligor to deal with the assets subject to that
          security on terms permitted under the Finance Documents, take effect
          as floating security, (d) the time-barring of claims under the
          Limitation Acts, (e) rules against penalties and similar principles
          and (f) any other qualifications or reservations as to matters of law
          only contained in the legal opinions referred to in paragraph 7 of
          Schedule 3 or any other written legal opinion obtained by any of the
          Agents from its legal advisers under the terms of the Finance
          Documents; and

                                      -22-
<PAGE>

   1.2.12 "winding-up" of any person includes its dissolution and/or
          termination and/or any equivalent or analogous proceedings under the
          law of any jurisdiction in which the person concerned is incorporated,
          registered, established or carries on business or to which that person
          is subject.

1.3 Other References
    Save where a contrary intention appears, in this Agreement:

    1.3.1 a reference to a party to this Agreement or any other person is,
          where relevant, deemed to be a reference to or to include, as
          appropriate, their respective successors and permitted assignees or
          transferees;

    1.3.2 references to Clauses and Schedules are references to, respectively,
          clauses of and schedules to this Agreement and references to this
          Agreement include its Schedules;

    1.3.3 a reference to (or to any specified provision of) any agreement, deed
          or other instrument (including the Finance Documents) is to be
          construed as a reference to that agreement, deed or other instrument
          or that provision as it may have been or hereafter be, from time to
          time, amended, varied, supplemented, restated or novated but excluding
          for this purpose any amendment, variation, supplement or modification
          which is contrary to any provision of any of the Finance Documents;

    1.3.4 a reference to a statute or statutory instrument or accounting
          standard or any provision thereof is to be construed as a reference to
          that statute or statutory instrument or accounting standard or such
          provision thereof as the same may have been, or may from time to time
          hereafter be, amended or re-enacted;

    1.3.5 a time of day is a reference to London time;

    1.3.6 the index to and the headings in this Agreement are inserted for
          convenience only and are to be ignored in construing this Agreement;

    1.3.7 words importing the plural shall include the singular and vice versa;
          and

    1.3.8 if compliance with any monetary limit specified in any of the
          provisions of Clauses 18 (Representations and Warranties), 19
          (Undertakings) (other than 19.7 (Financial Covenants)) or 20 (Events
          of Default) falls to be determined on any date, any conversion from
          any currency to Dollars necessary for that purpose shall be by
          reference to the Facility Agent's $ Spot Rate of Exchange on the date
          of that determination.

1.4 Amendments to s349 ICTA 1988
    If section 349 of the Income and Corporation Taxes Act 1988 is at any time
    after the date of this Agreement amended or repealed, the Facility Agent
    may, at any time and from time to time by notice to (and after consultation
    with) the Obligors' Agent and by notice to the Banks, amend paragraph (a) of
    the definition of "Qualifying Bank" in Clause 1.1 (Definitions) in such
    manner and to such extent, or replace that definition with a new definition
    in such form as the Facility Agent reasonably determines will have the same
    or

                                      -23-
<PAGE>

    equivalent effect as the existing definition thereof, having regard to
    the context(s) in which the expression "Qualifying Bank" is used in this
    Agreement (and which is consistent with general market practice at the
    relevant time). The right of the Facility Agent to amend or replace the
    definition of "Qualifying Bank" pursuant to this Clause 1.4 shall extend
    also to any amended or replaced definition for the time being in force as a
    result of the application of this Clause 1.4. If the definition of
    "Qualifying Bank" is amended or replaced pursuant to the foregoing
    provisions of this Clause 1.4, the amended or, as the case may be,
    replacement definition shall take effect to the exclusion of the relevant
    previous definition thereof as from such date as the Facility Agent shall
    specify, but no earlier than the date on which the relevant amendment or
    repeal takes effect.

1.5 Barclays Capital
    References in the Finance Documents to "Barclays Capital" are references to
    Barclays Capital, the investment banking division of Barclays Bank PLC.

2.  THE FACILITIES
2.1 Facilities
    On the terms and subject to the conditions of this Agreement:

    2.1.1  the Tranche A Banks agree to make available to the Borrower a Dollar
           term loan facility in a maximum aggregate principal amount not
           exceeding $10,000,000; and

    2.1.2  the Tranche B Banks agree to make available to the Borrowers a dollar
           term loan facility in a maximum aggregate principal amount not
           exceeding $90,000,000.

2.2 Purpose
    2.2.1 The proceeds of the Tranche A Advance referred to in sub-clause 2.1.1
          shall be applied in or towards making a subordinated loan to Finance
          Co. of monies to be used in the funding by Bidco of the financing of
          the Acquisition (as defined in the Bridge Facility Agreement).

    2.2.2 The proceeds of the Tranche B Advance shall be applied in payment of
          the price for acquisition of the Target Shares pursuant to the
          Conditional Sale Agreement.

    2.2.3 No Finance Party shall be obliged to concern themselves as to the use
          or application of amounts raised hereunder.

2.3 No Recourse against Officers

    No Finance Party shall have any recourse against any director or officer of
    any Group Company by virtue of anything contained in any certificate or
    other document signed in good faith by the relevant director or officer
    believing its contents to be true, complete and accurate and delivered to
    any Finance Party pursuant to any provision of this Agreement.

                                      -24-
<PAGE>

3.  PARTICIPATION OF BANKS

3.1 Basis of Participation

    3.1.1 Subject to the other provisions of this Agreement, each Tranche A
          Bank will participate in each Tranche A Advance in the proportion
          which its Tranche A Commitment bears to the total Tranche A
          Commitments as at the date on which the Tranche A Advance is made.

    3.1.2 Subject to the other provisions of this Agreement, each Tranche B
          Bank will participate in each Tranche B Advance in the proportion
          which its Tranche B Commitment bears to the total Tranche B
          Commitments as at the date on which the Tranche B Advance is made.

3.2 Lending Office

    3.2.1 Each Bank will participate in each Utilisation through its Lending
          Office.

    3.2.2 If any Bank changes its Lending Office for the purpose of the
          Facilities, that Bank will notify the Facility Agent and the Obligors'
          Agent promptly of such change and, until it does so, the Facility
          Agent and the Obligors' Agent will be entitled to assume that no such
          change has taken place.

3.3 Rights and Obligations of Finance Parties

    3.3.1 The rights and obligations of each of the Banks and other Finance
          Parties under the Finance Documents are several. Failure of a Bank or
          other Finance Party to observe and perform its respective obligations
          under any Finance Document shall neither:

          (a)  result in any other Finance Party incurring any liability
               whatsoever; nor

          (b)  relieve any Obligor or any other Finance Party from their
               respective obligations under the Finance Documents.

    3.3.2 Notwithstanding any other provision of any Finance Document, the
          interests of each Finance Party are several and the total amounts
          outstanding at any time under the Finance Documents and due to each
          Finance Party constitute separate and independent debts. Accordingly,
          as regards each Bank and its participation in an Advance the amount of
          principal advanced by that Bank will constitute a separate and
          independent debt owed to it.

3.4 Enforcement of Rights

    Subject to any provision of the Finance Documents to the contrary, each
    Finance Party has the right to protect and enforce its rights arising out of
    the Finance Documents and it will not be necessary for any other Finance
    Party to be joined as an additional party in any proceedings brought for the
    purpose of protecting or enforcing such rights.

3.5 Syndication

    3.5.1 The parties confirm that, at the date of this Agreement, the
          Facilities are being made available by the relevant Original Banks
          with the intention (but not the obligation) that the Arranger should
          co-ordinate syndication of the Facilities ("Syndication").

                                      -25-
<PAGE>

    3.5.2 Prior to the Syndication Date, no Bank may assign or transfer, or
          deliver a Substitution Certificate in respect of, all or any part of
          its rights or obligations under any Finance Document without the prior
          consent of the Arranger.

    3.5.3 Each Obligor acknowledges that Syndication will take place and
          undertakes to assist and co-operate with the Arranger in Syndication
          in such manner and to such extent as the Arranger may from time to
          time reasonably request including, without limitation, by:

          (a)  the review and approval of an information memorandum
               ("Syndication Information Memorandum") in relation to the Group
               and the business, trading, prospects, financial condition, assets
               and liabilities of the Group as a whole and of each Group
               Company;

          (b)  participating in presentations to potential Banks concerning the
               activities of the Group as a whole and of each Group Company;

          (c)  selecting Interest Periods in relation to Advances having a
               duration of not more than one month in respect of all Advances
               made on or before the date falling 3 months after the date of the
               making of the second Advance; and

          (d)  entering into the Syndication Agreement with proposed new Banks
               (incorporating any minor amendments to the Finance Documents as
               may be reasonably requested by the proposed new Banks and agreed
               to by the Arranger (in consultation with the Obligors' Agent),
               but nothing in this sub-clause 3.5.3(d) will require the
               Obligors' Agent to agree to any amendment which may prejudice any
               Obligor in any way).

4.  CONDITIONS PRECEDENT

4.1 Initial Conditions Precedent

    4.1.1 Documentary: The Banks shall not be under any obligation to make any
          Advance available to the Borrowers under this Agreement unless the
          Facility Agent has received each of the documents and/or information
          specified in Schedule 3 (or the Facility Agent is satisfied that,
          subject only to the making of the Advances on the first Utilisation
          Date, it will receive such documents and/or information) in form and
          substance satisfactory to the Facility Agent.

    4.1.2 Notification: When the Facility Agent is satisfied that the
          conditions specified in sub-clause 4.1.1 have been fulfilled, it will
          promptly notify the Obligors' Agent and the Original Banks.

4.2 Failure to Satisfy Conditions Precedent

    If the conditions referred to in Clause 4.1 (Initial Conditions Precedent)
    have not been fulfilled or waived by expiry of the Tranche A Availability
    Period or, as the case may be, Tranche B Availability Period:

    4.2.1 all the Tranche A Commitments or, as the case may be, Tranche B
          Commitments will automatically be cancelled; and

                                      -26-
<PAGE>

    4.2.2 the Banks will cease to have any obligation to make any Advance to
          any Borrower.

4.3 Additional Conditions Precedent

    The obligations of the Banks to make any Advance to the Borrowers are
    subject to the following further conditions precedent that, on both the date
    of the relevant Utilisation Request and the date of the making of the
    relevant Advance:

    4.3.1 no Event of Default or Potential Event of Default has occurred and is
          continuing unwaived and no Event of Default or Potential Event of
          Default could reasonably be expected to occur as a result of making
          the Advance;

    4.3.2 the representations and warranties set out in Clause 18
          (Representations and Warranties) stipulated as being repeated on those
          dates are true and accurate, in each case by reference to the facts
          and circumstances then subsisting, and will remain true and accurate
          immediately after the Advance is made; and

    4.3.3 none of the circumstances specified in Clause 9 (Market Disruption)
          has occurred and is continuing.

5.  BORROWERS UNDER THE FACILITIES

5.1 Initial Borrower
    The initial Borrower under this Agreement is AOC.

5.2 Additional Borrowers

    A Group Company which is a Subsidiary of Octel Associates may become a
    Borrower after the date of this Agreement if:

    5.2.1 the Obligors' Agent gives written notice to the Facility Agent
          identifying the relevant Group Company (such notice to be accompanied
          by certified copies of such Group Company's most recent audited
          accounts and its memorandum and articles);

    5.2.2 the relevant Group Company is a wholly-owned Subsidiary of Octel
          Resources incorporated in England or, if it is not, all the Banks
          confirm to the Facility Agent that they consent to the relevant Group
          Company becoming a Borrower;

    5.2.3 the relevant Group Company, the Obligors' Agent (for itself and as
          agent for the existing Obligors) and the Facility Agent execute an
          Accession Document designating the relevant Group Company as a
          Borrower and an accession agreement to the Subordination Deed; and

    5.2.4 the relevant Group Company delivers the documents listed in paragraph
          1 of Schedule 3 in relation to itself to the satisfaction of the
          Facility Agent, together with such legal opinions as the Facility
          Agent may reasonably require.

5.3 Effective Time

    Upon the conditions set out in Clause 5.2 (Additional Borrowers) being
    satisfied, the Facility Agent will notify the Obligors' Agent and the
    Finance Parties and the relevant

                                      -27-
<PAGE>

    Group Company will become a Borrower with effect from such notification as
    if it had been an original party to this Agreement as a Borrower.

5.4 Obligors' Agent

    5.4.1 Each Obligor by its execution of this Agreement or an Accession
          Document irrevocably appoints the Obligors' Agent to act on its behalf
          as its agent in relation to the Finance Documents and irrevocably
          authorises the Obligors' Agent on its behalf to give and receive all
          notices and instructions (including, in the case of a Borrower,
          Utilisation Requests), to execute on its behalf the Syndication
          Agreement and any Accession Document and to enter into any agreement
          capable of being entered into by any Obligor (notwithstanding that
          such Agreement may affect that Obligor) without further reference to,
          or the consent of, that Obligor and that Obligor shall be bound
          thereby as though that Obligor itself had given the relevant notices
          and instructions (including, without limitation, any Utilisation
          Requests) or entered into the relevant agreements.

    5.4.2 Subject to sub-clause 5.4.1, every act, omission, agreement,
          undertaking, settlement, waiver, notice or other communication given
          or made by the Obligors' Agent under or in connection with any of the
          Finance Documents (whether or not known to any Obligor and whether
          occurring before or after that Obligor became an Obligor under this
          Agreement) shall be binding for all purposes on all Obligors as if
          those Obligors had expressly concurred with the same. In the event of
          any conflict between any notices or other communications of the
          Obligors' Agent and any Obligor, those of the Obligors' Agent shall
          prevail.

    5.4.3 The Parent may from time to time by not less than 10 Business Days'
          prior written notice to the Facility Agent nominate any other Obligor
          (a "new Obligors' Agent") as the Obligors' Agent in substitute for an
          existing Obligors' Agent. Any such notice shall:

          (a)  contain the address details of the new Obligors' Agent for the
               purposes of Clause 25 (Notices); and

          (b)  take effect on the later of the date specified in that notice and
               the date falling 10 Business Days after the date of actual
               receipt by the Facility Agent of that notice.

    5.4.4 The effectiveness of any notice referred to in sub-clause 5.4.3 shall
          not prejudice the validity of sub-clause 5.4.2 in respect of any
          matters arising prior to that notice taking effect.

    5.4.5 The Facility Agent shall notify the Banks promptly following receipt
          of any notice referred to in sub-clause 5.4.3.

5.5 The Partners

    Each Partner shall be severally (as well as jointly with the other Partner)
    liable for the performance by Octel Associates of its payment and other
    obligations under the Finance

                                      -28-
<PAGE>

     Documents to which Octel Associates is a party and compliance by Octel
     Associates with the terms of those Finance Documents.

6.   UTILISATION PROCEDURES
6.1  Delivery of Utilisation Requests

     In order to utilise the Facilities, the Obligors' Agent must deliver to the
     Facility Agent a duly completed Utilisation Request not later than l0.00
     a.m. three Business Days prior to the proposed Utilisation Date.

6.2  Content of Utilisation Requests
     Each Utilisation Request delivered to the Facility Agent must be in the
     relevant form set out in Schedule 4 and must specify (or attach, as
     appropriate) each of the following:

     6.2.1 whether the proposed Advance is a Tranche A Advance or a Tranche B
           Advance;

     6.2.2 the proposed Utilisation Date (which must be a Business Day falling
           within the Tranche A Availability Period or, as the case may be,
           Tranche B Availability Period);

     6.2.3 the amount and, in the case of that Advance, which must be equal to
           or less than the undrawn portion of the total Tranche A Commitments
           or, as the case may be, Tranche B Commitments;

     6.2.4 the duration of the first Interest Period applicable to such Tranche
           A Advance which must comply with Clause 8 (Selection of Interest
           Periods);

     6.2.5 details of the payee and the account to which the proceeds of the
           Advance are to be paid; and

     6.2.6 the identity of the Borrower.

6.3  Requests Irrevocable
     A Utilisation Request, once given, may not be withdrawn or revoked.

6.4  Notice to the Banks
     The Facility Agent will promptly give each Bank details of each Utilisation
     Request received and of the amount and currency of the Bank's participation
     therein.

6.5  Making of Advances
     Subject to the provisions of this Agreement, each Bank will make available
     to the Facility Agent its participation in the Advance concerned on the
     date on which the relevant Advance is made.

6.6  Automatic Cancellation
     Any part of the Tranche A Commitments or, as the case may be, Tranche B
     Commitments undrawn by 2.30 p.m. on the last day of the Tranche A
     Availability Period or, as the case may be, Tranche B Availability Period
     will be automatically cancelled.

                                      -29-
<PAGE>

7.   INTEREST

7.1  Rate
     Each Advance will bear interest for each of its Interest Periods at the
     rate per annum determined by the Facility Agent to be the aggregate of:

     7.1.1 the Margin applicable to that Advance; and

     7.1.2 LIBOR applicable to that Advance; and

     7.1.3 the Mandatory Costs Rate (if any) applicable to that Advance.

7.2  Calculation

     Interest will accrue on a daily basis and be calculated on the basis of
     actual days elapsed and a 360 day year and will accrue from day to day from
     and including the first day of each Interest Period.

7.3  Payment

     The relevant Borrower will pay interest accrued on each Advance to the
     Facility Agent (for the account of the Banks) in arrears on the last day of
     each Interest Period applicable to that Advance, provided that, where such
     Interest Period is of a duration of longer than 6 months, accrued interest
     in respect of the relevant Advance will be paid every 6 months during such
     Interest Period and on the last day of the Interest Period.

7.4  Default Interest

     If any Obligor fails to pay any sum (including, without limitation, any sum
     payable pursuant to this Clause 7.4) under any Finance Document on its due
     date (an "overdue amount"), such Obligor will pay default interest on such
     overdue amount from its due date to the date of actual payment (both before
     and after judgment) at a rate determined by the Facility Agent in
     accordance with this Clause 7.4. Such interest shall be calculated and
     payable by reference to successive Interest Periods, each of which (other
     than the first, which shall begin on the due date) shall begin on the last
     day of the previous one. Each such Interest Period shall be of such
     duration as the Facility Agent may from time to time select and the rate of
     interest applicable for a particular Interest Period shall be the rate per
     annum (the "Default Rate") equal to the sum of 1 per cent. per annum and:

     7.4.1  where the overdue amount is principal which has fallen due prior to
            the expiry of the relevant Interest Period, the rate applicable to
            such principal immediately prior to the date it so fell due (but
            only for the period from such date to the end of the relevant
            Interest Period); or

     7.4.2  in any other case (including principal falling within sub-clause
            7.4.1 once the relevant Interest Period has expired), the rate which
            would be payable if the overdue amount was an Advance made for a
            period equal to the period of non-payment divided into successive
            Interest Periods of such duration as shall be selected by the
            Facility Agent (each "Default Interest Period").

7.5  Compounding
     Default interest will be payable on demand by the Facility Agent and will
     be compounded at the end of each Default Interest Period.

                                      -30-
<PAGE>

7.6  Notification
     The Facility Agent will promptly notify the relevant Borrower and the Banks
     of each determination of an interest rate (including a Default Rate) and
     each selection of a Default Interest Period.

8.   SELECTION OF INTEREST PERIODS
8.1  Selection

     Subject to sub-clause 3.5.3(c) and the other provisions of this Agreement,
     the duration of each Interest Period for an Advance shall be 1, 2, 3 or 6
     months, may be, as notified by the Obligors' Agent to the Facility Agent
     not later than 10.00 a.m. three Business Days prior to the commencement of
     such Interest Period (or such other period as the Facility Agent (acting on
     the instructions of all the Banks) may, at the request of the Obligors'
     Agent, agree in writing), provided that:

     8.1.1 the first Interest Period in relation to an Advance will commence on
           the Utilisation Date relating thereto and each subsequent Interest
           Period relating to that Advance will commence on the expiry of the
           immediately preceding Interest Period relating thereto;

     8.1.2 the Obligors' Agent will select the duration principal amount of
           Advances with Interest Periods ending on each Repayment Date relating
           thereto is at least equal to the amount of any repayment instalment
           due on that date and, for this purpose, the Obligors' Advances, one
           of which shall (if applicable) be in an amount at least equal to the
           amount of the instalment due on the next following Repayment Date
           relating thereto and having an Interest Period expiring on that
           Repayment Date and the other of which shall have an Interest Period
           of the duration selected by the Obligors' Agent in accordance with
           this Clause 8.1;

     8.1.3 if the Obligors' Agent fails to select an Interest Period then,
           subject as provided in this Clause 8, it will be deemed to have
           selected a period of 3 months, or such lesser period so as to comply
           with the requirements of sub-clause 8.1.2.

8.2  Non-Business Days
     If any Interest Period would, but for this Clause 8.2, end on a day which
     is not a Business Day, that Interest Period shall be extended to the next
     succeeding Business Day, unless the result of such extension would be to
     carry such Interest Period into another calendar month, in which event such
     Interest Period shall end on the last preceding Business Day.

9.   MARKET DISRUPTION
9.1  Market Disruption Notice
     If, in relation to any Advance and the Interest Period relating thereto
     (the "Affected Advance"):

     9.1.1 the Facility Agent, after consultation with the Reference Banks and
           the Obligors' Agent, determines that, by reason of circumstances
           affecting the London interbank market generally, adequate and fair
           means do not or will not exist for ascertaining LIBOR applicable to
           the Affected Advance; or

                                      -31-
<PAGE>

     9.1.2 Banks whose participations in the Affected Advance exceed 50 per
           cent. of the amount of that Advance notify the Facility Agent that
           LIBOR would not accurately reflect the cost to those Banks of making
           or maintaining their respective participations in the Affected
           Advance; or

     9.1.3 LIBOR applicable to the Affected Advance is to be calculated in
           accordance with paragraph (b) of the definition of "LIBOR" in Clause
           1.1 (Definitions) and none or only one of the Reference Banks
           notifies a rate to the Facility Agent for the purposes of determining
           LIBOR applicable to the Affected Advance,

     the Facility Agent will give notice of such event to the Obligors' Agent
     and the Banks (a "Market Disruption Notice").

9.2  Substitute Basis
     During the 30 days following the giving of a Market Disruption Notice, the
     Facility Agent and the Obligors' Agent will negotiate in good faith in
     order to agree on a mutually acceptable substitute basis for calculating
     the interest payable on the Affected Advance. If a substitute basis is
     agreed within that period then it shall apply in accordance with its terms
     (and may be retrospective to the beginning of the relevant Interest
     Period).

9.3  Cost of Funds
     Unless and until a substitute basis is agreed under Clause 9.2 (Substitute
     Basis), the interest payable on each Bank's participation in the Affected
     Advance for the relevant Interest Period will be the rate certified by that
     Bank to be its cost of funds (from such sources as it may reasonably
     select) plus the Mandatory Costs Rate (if relevant) plus the applicable
     Margin.

9.4  Approval of Banks
     The Facility Agent will not agree a substitute basis under Clause 9.2
     (Substitute Basis) without first obtaining the approval of all the Banks.

10.  REPAYMENT OF ADVANCES
10.1 Repayment

     10.1.1 The Borrowers shall procure that, subject to the application of
            Clause (Prepayments: Order of Application), the aggregate
            outstanding principal amount of the Advances shall be repaid in
            instalments, each instalment falling due on each of the dates
            specified in column (1) below and being in the amount specified
            opposite that date in column (2) below and any balance of the
            aggregate outstanding principal amount of the Advances remaining
            outstanding on the Final Maturity Date shall be repaid in full on
            the Final Maturity Date:

                  (1)  Repayment Date    (2)  Amount ($)
                       ----------------       ----------

                       31 December 1999       10,000,000
                       30 June 2000           10,000,000
                       31 December 2000       10,000,000
                       30 June 2001           15,000,000

                                      -32-
<PAGE>

                  (1)  Repayment Date    (2)  Amount ($)
                       ----------------       ----------
                       31 December 2001       15,000,000
                       30 June 2002           20,000,000
                       31 December 2002       20,000,000

     10.1.2 No amount repaid in respect of an Advance may be redrawn by any
            Borrower.

10.2 Miscellaneous
     The provisions of Clause 11.5 (Miscellaneous) shall apply to any
     repayment under this Clause 10.

11.  PREPAYMENT AND CANCELLATION
11.1 Voluntary Prepayment

     Any Borrower may prepay the whole or any part of an Advance at any time,
     provided that the Facility Agent has received not less than ten Business
     Days' irrevocable written notice from the Obligors' Agent of the proposed
     date and amount of the prepayment and provided that:

     11.1.1 any partial prepayment of an Advance will be in a minimum amount of
            $10,000,000 and, if greater, an integral multiple of $1,000,000;

     11.1.2 if paid other than on the last day of an Interest Period, the
            relevant Borrower indemnifies the Banks for breakage costs (if
            applicable) in accordance with Clause 31.1 (General Indemnity and
            Breakage Costs); and

     11.1.3 such prepayment shall be applied in accordance with Clause 11.3
            (Prepayments: Order of Application).

11.2 Additional Right of Prepayment
     If:

     11.2.1 a Borrower is required to pay a Bank any additional amount under
            Clause (Gross-Up); or

     11.2.2 the Obligors' Agent is required to pay a Bank (or procure payment to
            a Bank of) any amount under Clause 14.1 (Increased Costs),

     then, without prejudice to the obligations of any Obligor under those
     Clauses, the Obligors' Agent may, whilst the circumstances continue, serve
     a notice of prepayment and cancellation on that Bank through the Facility
     Agent. If the Obligors' Agent serves any such notice:

       (a)  on the date which is ten Business Days' after the date of service of
            the notice, each Borrower shall prepay that Bank's participation in
            all Advances drawn by it, together with accrued interest thereon;
            and

       (b)  all that Bank's Commitments shall be cancelled as at the date of
            service of the notice.

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<PAGE>

11.3 Prepayments: Order of Application:

     11.3.1 Prepayments made pursuant to Clauses 11.1 (Voluntary Prepayment)
            shall be applied against the outstanding principal amount of the
            Advances and, in relation to the unpaid instalments in respect of
            the Facilities, against the scheduled instalments of principal
            detailed in Clause 10.1 (Repayment) in inverse order of maturity,
            until the Facilities have been reduced to zero.

     11.3.2 Subject as otherwise provided in this Agreement, the Obligors' Agent
            shall, by notice in writing to the Facility Agent to be received not
            later than three Business Days prior to the date of the relevant
            repayment or prepayment, designate which Advances are to be repaid
            or prepaid in order to meet amounts due on such date.

11.4 Restrictions on Prepayment
     No prepayment may be made except at the times and in the manner expressly
     provided by this Agreement.

11.5 Miscellaneous:

     11.5.1 Any repayment or prepayment must be accompanied by any accrued
            interest on the amount repaid or prepaid and any other sum then due
            under this Agreement.

     11.5.2 Any repayment or prepayment of an Advance (or part thereof) shall be
            made in the currency in which that Advance is denominated.

     11.5.3 No amount prepaid in respect of any Advance may be reborrowed by any
            Borrower.

     11.5.4 The Facility Agent shall notify the Banks promptly following receipt
            of any notice of prepayment and/or cancellation under this
            Agreement.

11.6 Cancellation

     11.6.1 The Obligors' Agent may cancel the Tranche A Commitments or Tranche
            B Commitments in whole or in part (but if in part a minimum of
            $10,000,000 and an integral multiple of $1,000,000) at any time
            during the Tranche B Availability Period or, as the case may be, the
            Tranche A Availability Period by giving not less than 10 Business
            Days' irrevocable written notice to that effect to the Facility
            Agent specifying the date and amount of the proposed cancellation.

     11.6.2 No Borrower may cancel all or any part of the Facilities except as
            expressly provided in this Agreement. Any notice of cancellation
            shall be irrevocable and no part of the Facilities which has been
            cancelled shall be capable of being re-utilised.

     11.6.3 The Tranche B Facility shall be cancelled in full in that the event
            the Acquisition (as defined in the Bridge Facility Agreement) lapses
            or is withdrawn or such Acquisition is referred to any competent
            competition authorities in a relevant state.

                                      -34-
<PAGE>

12.  PAYMENTS
12.1 By Banks:

     12.1.1 On each date on which an Advance is to be made, each Bank shall make
            its share of that Advance available to the Facility Agent on that
            date by payment in the currency of that Advance and in immediately
            available cleared funds to such account as the Facility Agent shall
            specify for that purpose.

     12.1.2 The Facility Agent shall make the amounts so paid to it available to
            the relevant Borrower before close of business on that date by
            payment in the same currency and funds as received by the Facility
            Agent to such account of the relevant Borrower as the Obligors'
            Agent shall have specified in the notice requesting that Advance. If
            any Bank makes its share of any Advance available to the Facility
            Agent later than required by sub-clause 12.1.1, the Facility Agent
            shall make that share available to the relevant Borrower as soon as
            practicable thereafter.

12.2 By Obligors:

     12.2.1 On each date on which any sum is due from any Obligor under the
            Finance Documents, that Obligor shall pay that sum on that date to
            the Facility Agent in the currency in which it is due and in
            immediately available cleared funds to such account as the Facility
            Agent shall specify for that purpose.

     12.2.2 The Facility Agent shall pay to the party to the Finance Documents
            to which such sum is due before close of business on that date its
            pro rata share (if any) of any sums so paid to the Facility Agent in
            the same currency and funds as received by the Facility Agent to
            such account of that party with such bank as it shall have specified
            to the Facility Agent. If any sum is paid to the Facility Agent
            later than required by sub-clause 12.2.2, the Facility Agent shall
            make that party's share (if any) available to it as soon as
            practicable thereafter.

12.3  Assumed Receipt

      Where a sum is to be paid under any Finance Document for the account of
      another person, the Facility Agent will not be obliged to make any such
      sum available to that person until it has been able to establish to its
      satisfaction that it has actually received such sum, but if it does so and
      it proves to be the case that it had not actually received the sum it paid
      out, then such person will on request ensure that the amount so made
      available is refunded to the Facility Agent and such person will be liable
      (a) to pay to the Facility Agent interest on the amount in question at the
      rate determined by the Facility Agent to be equal to the cost to the
      Facility Agent of funding such amount for the period from payment out by
      the Facility Agent until refund to the Facility Agent thereof and (b) to
      indemnify the Facility Agent against any additional cost or loss it may
      have suffered or incurred by reason of it having paid out such sum prior
      to it having received the same.

12.4  No Set-off or Deductions

      All payments made by any Obligor under the Finance Documents (whether of
      principal, interest, acceptance commission, fees or otherwise) will be
      paid in full without set-off or counterclaim and not subject to any
      condition and free and clear of and without any

                                      -35-
<PAGE>

      deduction or withholding for or on account of any Taxes (except as
      provided in Clause 13 (Taxes)).

12.5  Business Days

      Subject to Clause 8.2 (Non-Business Days), if any sum would otherwise
      become due for payment pursuant to any of the Finance Documents on a day
      which is not a Business Day, such sum shall become due on the next
      succeeding Business Day and all sums payable under any of the Finance
      Documents calculated by reference to any period of time shall be
      recalculated on the basis of such extension in time.

13.   TAXES
13.1  Gross-Up

      If any deduction or withholding for or on account of Taxes or any other
      deduction or withholding from any payments made or to be made by any
      Obligor or by any Agent to any other Finance Party under any of the
      Finance Documents is required by law, then, subject to Clause 13.2
      (Exemptions from Gross-Up), such Obligor will:

      13.1.1 pay to the relevant Taxation or other authorities within the period
             for payment permitted by the applicable law, such amount as is
             required to be paid in consequence of the deduction or withholding
             (including, but without prejudice to the generality of the
             foregoing, the full amount of any deduction from any additional
             amount paid pursuant to this Clause 13.1 (Gross Up) and shall
             deliver to the Facility Agent appropriate evidence of payment of
             that amount;

      13.1.2 promptly pay to the Finance Party concerned such additional amounts
             as may be required to procure that the aggregate net amount
             received by such Finance Party will equal the full amount which
             would have been received by it had no such deduction or withholding
             been made; and

      13.1.3 indemnify each of the Finance Parties against any losses or costs
             incurred by it by reason of (a) any failure on the part of the
             relevant Obligor to make any deduction or withholding or (b) any
             such additional amount not being paid on the due date for payment
             thereof.

13.2  Exemptions from Gross-Up

      No additional amount will be payable to a Finance Party under Clause 13.1
      (Gross-Up) in respect of Taxes to the extent that the relevant deduction
      or withholding would not have arisen if the relevant Finance Party had
      been a Qualifying Bank at the time the payment concerned fell due (unless
      the reason it is not a Qualifying Bank is the introduction of, or a change
      after the date of this Agreement in, any law or regulation, or a change
      after the date of this Agreement in the published interpretation or
      published application of any law or regulation or in any published
      practice or published concession of the Inland Revenue).

13.3  Indemnity

      Without prejudice to Clause 13.1 (Gross-Up), if (as a result of any change
      after the date of this Agreement in any law or regulation, or in the
      published interpretation or published application thereof or in any
      published practice or published concession of the Inland Revenue) any
      Finance Party (or any person on its behalf) is required to make any

                                      -36-
<PAGE>

      payment of Tax (other than Tax on Overall Net Income) on or calculated by
      reference to the amount of any payment received or receivable by that
      Finance Party (or any person on its behalf) under the Finance Documents
      (including, without limitation, under Clause 13.1 (Gross-Up)) or any
      liability for Tax in respect of any such payment is assessed, levied,
      imposed or claimed against any Finance Party (or any person on its behalf)
      the relevant Obligor shall, within five Business Days of demand by the
      Facility Agent, indemnify the relevant Finance Party (or relevant other
      person) against such payment or liability and any cost, charges and
      expenses (including, without limitation, penalties) properly payable or
      properly incurred in connection therewith.

13.4  Filings

      If an Obligor is required (or would in the absence of any such filing be
      required) to make a deduction or withholding for or on account of Taxes,
      such Obligor shall, and each relevant Finance Party shall, promptly file
      such forms and documents as the appropriate taxation authority may
      reasonably require in order to enable such Obligor to make relevant
      payments under the Finance Documents without having to make such deduction
      or withholding.

13.5  Treaty Banks

      A Treaty Bank will, as soon as reasonably practicable after receiving a
      request from the Obligors' Agent to that effect, deliver to that Treaty
      Bank's local revenue authority such United Kingdom Inland Revenue forms as
      may be required in order to enable an Obligor to make relevant payments
      under this Agreement without having to make a deduction or withholding on
      account of United Kingdom Taxes.

13.6  Tax Credits:

      13.6.1 If and to the extent that any Finance Party is able, in its sole
             opinion exercised in good faith, to apply or otherwise take
             advantage of any offsetting Tax credit or other similar Tax benefit
             arising out of or in conjunction with any deduction or withholding
             which gives rise to an obligation on any Obligor to pay any
             additional amount pursuant to Clause 13.1 (Gross-Up), that Finance
             Party shall, to the extent that, in its sole opinion it can do so
             without prejudice to the retention of the amount of such credit or
             benefit, reimburse to such Obligor at such time as such Tax credit
             or benefit shall have actually been received by that Finance Party
             such amount as that Finance Party shall, in its sole opinion, have
             determined to be attributable to the relevant deduction or
             withholding and as will leave it in no better or worse position
             than it would have been in if the payment of such additional amount
             had not been required. Such reimbursement (if any) shall (in the
             absence of manifest error) be conclusive evidence of the amount due
             to such Obligor and shall be accepted by such Obligor in full and
             final settlement of any claim for reimbursement under this Clause
             13.6 (Tax Credits).

     13.6.2  Nothing in this Clause 13 shall oblige any Finance Party to
             disclose to any Obligor or any other person any information
             regarding its Tax affairs or Tax computations or interfere with the
             right of any Finance Party to arrange its Tax affairs in whatever
             manner it thinks fit and, in particular, no Finance Party shall be
             under any obligation to claim relief from its corporate profits or
             similar Tax

                                      -37-
<PAGE>

             liability in priority to any other claims, reliefs, credits or
             deductions available to it and, if it does claim, the extent, order
             and manner in which it does so shall be at its absolute discretion.

     13.6.3  Each Finance Party will notify the Obligors' Agent as soon as
             reasonably practicable after becoming aware that it has received
             any Tax credit or benefit referred to in sub-clause 13.6.1 and of
             that Finance Party's opinion as to the amount or value of that Tax
             credit or benefit.

13.7 Collecting Agents Rules
     Each Bank represents to each Agent that, on the date it becomes a party to
     this Agreement, it is:

     13.7.1 either:

            (a)  not resident in the United Kingdom for United Kingdom tax
                 purposes; or

            (b)  a bank as defined in section 840A of the Income and Corporate
                 Taxes Act 1988 and resident in the United Kingdom; and

     13.7.2 beneficially entitled to the principal and interest payable by the
            Facility Agent to it under this Agreement,

     (or, if it is not able to make those representations, will ensure that it
     assigns, transfers or novates its rights in respect of each Advance then
     made to an entity in respect of which both representations are correct)
     and, if it is able to make those representations on the date on which it
     becomes a party to this Agreement, shall forthwith notify the Facility
     Agent if either representation ceases to be correct.

14.  CHANGE IN CIRCUMSTANCES
14.1 Increased Costs:

     14.1.1 If the effect of any change in or introduction or making (in each
            case) after the date of this Agreement of any law, regulation,
            treaty or official directive or official request applicable to any
            Bank (an "Affected Bank") or any Holding Company of such Affected
            Bank (whether or not having the force of law but, if not, being of a
            type with which banks generally in the relevant jurisdiction are
            accustomed, expected or required to comply) or any change in the
            interpretation or application thereof or compliance by any Affected
            Bank or any Holding Company of such Affected Bank with the same
            (including without limitation those relating to Taxation, reserve
            asset, special deposit, cash ratio, liquidity or capital adequacy
            requirements or any other form of banking or monetary controls) is
            to:

            (a)  impose an additional cost on the Affected Bank or any Holding
                 Company of such Affected Bank as a result of it having entered
                 into any of the Finance Documents or making or maintaining its
                 participation in any Advance or of it performing its
                 obligations under the Finance Documents; or

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<PAGE>

            (b)  reduce any amount payable to the Affected Bank or any Holding
                 Company of such Affected Bank hereunder or reduce the effective
                 return on the capital (or any class of capital) of the Affected
                 Bank or any Holding Company of the Affected Bank; or

            (c)  result in the Affected Bank or any Holding Company of such
                 Affected Bank making any payment or foregoing any interest or
                 other return on or calculated by reference to any amount
                 received or receivable by the Affected Bank or any Holding
                 Company of such Affected Bank from any other party under any of
                 the Finance Documents,

      (each such increased cost, reduction, payment, foregone interest or other
      return being hereafter referred to in this Clause 14.1 as an "increased
      cost"), then:

                 (i)  the Affected Bank will notify the Obligors' Agent and the
                      Facility Agent of such event promptly upon its becoming
                      aware of the same; and

                 (ii) upon demand from time to time by the Affected Bank, the
                      Obligors' Agent will pay or procure the payment to the
                      Affected Bank or any Holding Company of such Affected Bank
                      such amount as the Affected Bank shall reasonably
                      determine to be necessary to compensate the Affected Bank
                      or any Holding Company of such Affected Bank for such
                      increased cost (or the portion of such increased cost as
                      is in the reasonable opinion of the Affected Bank
                      attributable to its entering into the Finance Documents or
                      of making or maintaining its participation in any
                      Utilisation or of maintaining any Commitment).

     14.1.2 The certificate of an Affected Bank specifying the amount of
            compensation payable under sub-clause 14.1.1 and the basis for the
            calculation of that amount will, in the absence of manifest error,
            be conclusive.

     14.1.3 The Obligors' Agent will not be obliged to compensate any Affected
            Bank pursuant to sub-clause 14.1.1 in respect of any increased cost:

            (a)  compensated for by payment of the Mandatory Costs Rate; or

            (b)  attributable to a change in the rate of Tax or the manner of
                 calculation of Tax on Overall Net Income of the Affected Bank;
                 or

            (c)  compensated for by the operation of Clause 13 (Taxes).

14.2 Illegality

     If it is or becomes contrary to any law, regulation, treaty, or official
     directive or official request applicable to any Bank (a "Restricted Bank")
     (whether or not having the force of law but, if not, being of a type with
     which that Bank is accustomed, or expected or required to comply) in any
     jurisdiction applicable to such Restricted Bank for it to make available
     any of the Facilities or to maintain its participation in any Advance or
     maintain

                                      -39-
<PAGE>

      any Commitment, then the Restricted Bank may give written notice to that
      effect to the Facility Agent and the Obligors' Agent, whereupon:

      14.2.1 the relevant Borrowers will forthwith (or, if later, within any
             period permitted by the relevant law, regulation, treaty or
             official directive or official request) prepay the Restricted
             Bank's participation in all Advances then outstanding together with
             all interest accrued thereon and pay all other amounts due to the
             Restricted Bank under this Agreement (including pursuant to Clause
             31.1 (General Indemnity and Breakage Costs)); and

      14.2.2 the Restricted Bank's undrawn Commitments (if any) will be
             cancelled forthwith and the Restricted Bank will have no further
             obligation to make the Facilities available.

14.3  Mitigation
      If circumstances arise in relation to a particular Bank which would, or
      may, result in:

      14.3.1 an obligation to pay an additional amount under Clause 13.1
             (Gross-Up); or

      14.3.2 a demand for compensation pursuant to Clause 14.1 (Increased
             Costs); or

      14.3.3 an obligation to repay under Clause 14.2 (Illegality),

      then, without in any way limiting, reducing or otherwise qualifying the
      obligations of the Obligors' Agent under any of the Clauses referred to
      above, such Bank will promptly notify the Facility Agent and the Obligors'
      Agent thereof and, in consultation with the Facility Agent and the
      Obligors' Agent, take such reasonable steps as may be reasonably open to
      it to mitigate the effects of such circumstances including (but without
      limitation):

          (a)  changing its Lending Office for the purposes of this Agreement;
               or

          (b)  transferring its rights and obligations hereunder pursuant to
               Clause 29.2 (Assignments and Transfers by the Banks) or 29.3
               (Substitution Provisions),

     but the Bank concerned will not be obliged to take any action if to do so
     would or could (in its opinion) reasonably be expected to have a material
     adverse effect upon its business, operations or financial condition or
     cause it to incur liabilities or obligations (including Taxation) which (in
     its opinion) are material or would reduce its return in relation to its
     participation in the Facilities.

15.  FEES, EXPENSES AND STAMP DUTIES

15.1 Commitment Fee
     The Borrower will pay, or procure payment, to the Facility Agent for the
     account of each Bank a commitment fee on the Tranche A Facility from the
     date of this Agreement which will:

     15.1.1 be computed at the rate equal to 0.5 per cent. per annum on the
            daily, undrawn, uncancelled amount of that Bank's Tranche A
            Commitment; and

                                      -40-
<PAGE>

     15.1.2 be payable quarterly in arrears from the date of this Agreement.
            Accrued commitment fee is also payable to the Facility Agent for the
            account of each Bank on the cancelled amount of any Commitment of
            that Bank on the date on which any cancellation of any Commitment
            takes effect.

15.2 Agency Fees
     The Borrower will pay, or procure payment, to the Facility Agent:

     15.2.1 for its own account an agency fee; and

     15.2.2 for the account of the Security Agent an agency fee, at the times
            and otherwise in accordance with the terms of the Agency Fees
            Letter.

15.3 Arrangement Fees
     The Borrower will pay, or procure payment, to the Arranger of an
     Arrangement Fee at the times and otherwise in accordance with the terms of
     the Arrangement Fees Letter.

15.4 VAT
     All fees payable under the Finance Documents are exclusive of any value
     added tax or other similar tax chargeable upon or in connection with such
     fees. If any value added tax or other similar tax is or becomes so
     chargeable, such tax will be added to the fee concerned at the appropriate
     rate and will be paid by the relevant Obligor at the same time as the
     relevant fee itself is paid.

15.5 Initial Expenses

     The Borrower will on demand pay and reimburse to, or procure the payment
     and re-imbursement to, the Agents and the Arranger, on the basis of a full
     indemnity, all costs and expenses (including legal fees and other out-of-
     pocket expenses and any value added tax or other similar tax thereon)
     reasonably incurred by the Agents or the Arranger in connection with:

     15.5.1 the negotiation, preparation, execution and completion of each of
            the Finance Documents, the preparation, review and satisfaction of
            all conditions precedent under any of the Finance Documents and the
            registration of any security constituted by any of the Security
            Documents;

     15.5.2 any variation, amendment, restatement, waiver, consent or suspension
            of rights (or any proposal for any of the same) relating to any of
            the Finance Documents (and documents, matters or things referred to
            therein);

     15.5.3 the investigation of any Event of Default or Potential Event of
            Default, and

     15.5.4 Syndication (including the costs of preparing the Syndication
            Information Memorandum and all matters incidental to Syndication).

15.6 Enforcement Expenses

     The Borrower will on demand pay and reimburse, or procure the payment and
     re-imbursement, to each Finance Party, on the basis of a full indemnity,
     all costs and expenses (including legal fees and other out of pocket
     expenses and any value added tax or other similar tax thereon) incurred by
     such Finance Party in connection with the

                                      -41-
<PAGE>

     preservation, enforcement or the attempted preservation or enforcement of
     any of such Finance Party's rights under any of the Finance Documents (and
     documents referred to therein).

15.7 Stamp Duties, etc.:

     15.7.1 The Borrower will pay and on demand indemnify, or procure the
            payment and indemnification of, each Finance Party from and against
            any liability for any United Kingdom stamp duty, documentary and
            registration Taxes (if any) which are or may hereafter become
            payable in connection with the entry into, performance, execution or
            enforcement of any of the Finance Documents or to which any of the
            Finance Documents may otherwise be or become subject or give rise
            (excluding, for the avoidance of doubt, any incurred in connection
            with an assignment, transfer or novation pursuant to Clause 29
            (Changes to Parties)).

     15.7.2 No Finance Party may require any member of the Group to deliver any
            original copy of a Transaction Document (other than a Finance
            Document) to a place in the United Kingdom where such delivery could
            reasonably be expected to have adverse stamp duty or other Tax
            implications for any member of the Group, except where:

            (a)  an original copy of that Transaction Document is then, or has
                 at any time after the date of this Agreement already been, in
                 the United Kingdom; or

            (b)  that Finance Party (acting reasonably) considers it necessary
                 to require delivery of an original copy of that Transaction
                 Document for the purposes of, or in connection with, the
                 preservation or enforcement or the attempted preservation or
                 enforcement of its rights under the Finance Documents at that
                 time (including without limitation registration of any security
                 constituted by any of the Security Documents).

15.8 Delay in Payment

     The Borrower will on demand indemnify, or procure the indemnification of,
     each of the Finance Parties from and against any losses or liabilities
     which they incur as a result of any delay or omission by the Parent to so
     pay any such duties or Taxes.

15.9 Calculation and Payment:
     All fees payable under this Agreement shall accrue on a daily basis and
     shall be calculated by reference to a 360 day year in the case of fees
     payable in any other Available Currency.

16.  GUARANTEE AND ADDITIONAL GUARANTORS

16.1 Guarantee
     In consideration of the Finance Parties entering into the Finance Documents
     and making the Facilities available, each Guarantor irrevocably and
     unconditionally:

     16.1.1 guarantees as principal obligor to each Finance Party the due and
            punctual payment by each other Obligor of all indebtedness owed or
            owing by each such Obligor under or in connection with the Finance
            Documents as and when it becomes due;

                                      -42-
<PAGE>

     16.1.2 guarantees as principal obligor to each Finance Party the due and
            punctual performance by each other Obligor of all such Obligor's
            other obligations under the Finance Documents;

     16.1.3 undertakes with each Finance Party that, if any other Obligor fails
            to pay any of the indebtedness referred to in sub-clause 16.1.1 on
            its due date, it will pay such sum to the Facility Agent on demand;
            and

     16.1.4 undertakes to indemnify each Finance Party on demand against all
            losses, damages, costs and expenses incurred by such Finance Party
            arising from any failure by any other Obligor to comply with its
            obligations (or any of them) under any of the Finance Documents.

16.2 Further Guarantee Provisions
     The guarantees, undertakings and indemnities given in Clause 16.1
     (Guarantee):

     16.2.1 are given subject to, and with the benefit of, the provisions set
            out in Schedule 8;

     16.2.2 are given on a joint and several basis; and

     16.2.3 are to be a continuing security, notwithstanding any intermediate
            payment or settlement of account or other matter or thing whatsoever
            (in particular, but without limitation, the intermediate
            satisfaction of the whole or any part of the indebtedness referred
            to in Clause 16.1 (Guarantee)).

16.3 Further Guarantors

     The Parent will procure that any Material Group Company which is not a
     Guarantor shall (to the extent permitted under applicable law) become a
     Guarantor by executing an Accession Document and an accession agreement to
     the Subordination Deed as soon as reasonably practicable after being
     required to become a Guarantor by the Facility Agent.

16.4 Accession Formalities

     On each occasion that an Accession Document is entered into, there shall be
     delivered to the Facility Agent with the original executed Accession
     Document and accession agreement to the Subordination Deed certified copies
     of the documents listed in paragraph 1 of Schedule 3 in respect of the
     relevant Guarantor named in the Accession Document, each to be in a form
     satisfactory to the Facility Agent (acting reasonably), together with
     evidence that any necessary and available financial assistance procedures
     have been complied with and together also with such legal opinions as the
     Facility Agent may reasonably require (it being acknowledged that such
     opinion will, where applicable, contain customary qualifications for the
     jurisdiction in question as to the giving of a guarantee in such
     circumstances (for example, regarding lack of corporate benefit, financial
     assistance and insolvency laws)).

16.5 Execution of an Accession Document

     Each Accession Document and accession agreement to the Subordination Deed
     shall be executed by the relevant new Guarantor, by the Obligors' Agent
     (for itself and as agent for the existing Obligors) and by the Facility
     Agent (for itself and on behalf of the other Finance Parties).

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<PAGE>

16.6 Illegality Assistance Exemptions

     If it is unlawful for a member of the Group to become a Guarantor pursuant
     to Clause 16.3 (Further Guarantors) or provide security pursuant to Clause
     17.2 (Further Security), then the Obligors' Agent will use all reasonable
     endeavours to overcome the prohibition (and in the case of a financial
     assistance or similar prohibition will procure such member of the Group
     will undertake such whitewash procedures as are possible) to enable the
     relevant guarantee and security to be given as soon as is reasonably
     practicable.

17.  SECURITY AND RELEASES
17.1 Initial Security
     The obligations of the Obligors under the Finance Documents are to be
     guaranteed and secured by the Security Documents.

17.2 Further Security
     The Parent will procure that:

     17.2.1 any Material Group Company which has not entered into a Security
            Document shall (to the extent permitted under applicable law), as
            soon as reasonably practicable after being required to do so by the
            Facility Agent, execute a Security Document(s) in favour of the
            Security Agent for the benefit of the Finance Parties over all its
            assets, business and undertaking as security (inter alia) for all
            indebtedness under the Finance Documents, such security to provide
            (to the extent permissible under applicable law) equivalent security
            over such assets, business and undertaking (together "Relevant
            Assets") as granted to the Security Agent by Group Companies with
            similar Relevant Assets incorporated in the same jurisdiction as
            such Material Group Company and, if such Material Group Company is
            incorporated in a jurisdiction in which no other Group Company
            incorporated in that jurisdiction with similar Relevant Assets has
            granted security or if there is no Group Company in that
            jurisdiction, the Security Documents shall be in such form and
            substance as (following consultation with the Obligors' Agent) may
            be reasonably required by the Facility Agent; and

     17.2.2 the immediate Holding Company of such Material Group Company will
            (to the extent permissible under applicable law) execute a Security
            Document in favour of, and in form and substance satisfactory to,
            the Security Agent over the entire issued share capital of such
            Material Group Company.

17.3 Additional Formalities

     On each occasion that a Security Document is entered into pursuant to
     Clause 17.2 (Further Security), there shall be delivered to the Facility
     Agent with the original Security Document certified copies of the documents
     listed in paragraph 1 of Schedule 3 in respect of the relevant Group
     Company which executes that Security Document, each to be in a form
     satisfactory to the Facility Agent (acting reasonably), together with
     evidence that any necessary and available financial assistance procedures
     have been complied with and together with such legal opinions as the
     Facility Agent may reasonably require (it being acknowledged that such
     opinion will, where applicable,

                                      -44-
<PAGE>

     contain customary qualifications for the jurisdiction in question as to the
     granting of such security in the circumstances, and over the assets, in
     question).

17.4 Release of Security

     If any Obligor shall dispose of any asset (including shares in any other
     Group Company) which is the subject of security created in favour of the
     Finance Parties and such disposal is permitted by the terms of the Finance
     Documents or is otherwise consented to pursuant to the terms of the Finance
     Documents, then such asset shall be automatically released from such
     security and the Security Agent shall (and is hereby authorised by the
     Finance Parties to) execute such documents effecting the release of such
     asset from such security as shall be required to allow the disposal to take
     place.

17.5 Release of Guarantors

     If all of the shares in a Group Company which is a Guarantor are disposed
     of to a person or persons who are not a member of the Group and such
     disposal is permitted by the terms of the Finance Documents or consented to
     pursuant to the terms of the Finance Documents and as a result the
     Guarantor ceases to be a member of the Group, the Facility Agent and the
     Security Agent shall promptly (and are hereby authorised by the Finance
     Parties to) execute such documents as may be necessary to release such
     Guarantor (and its assets) from all past, present and future liabilities
     (including rights of contribution) under the Finance Documents and on the
     basis that all existing Guarantors hereby consent to such release and
     confirm that their respective liabilities as Guarantor shall not be
     discharged or otherwise affected as a consequence of such release.

18.  REPRESENTATIONS AND WARRANTIES
18.1 Representations and Warranties
     Each Obligor represents and warrants to each of the Finance Parties that:

     18.1.1 Incorporation: It, and each of its Subsidiaries, is duly
            incorporated and validly existing with limited liability under the
            laws of the place of its incorporation (or, in the case of Octel
            Associates, constitutes a partnership in accordance with English
            law) and has the power to own its assets and carry on its business
            as it is now being conducted.

     18.1.2 Power: It has the power to enter into, exercise its rights under,
            and perform and comply with its obligations under, each of the
            Transaction Documents to which it is party and to carry out the
            transactions contemplated by such Transaction Documents.

     18.1.3 Authority: All actions, conditions and things required to be taken,
            fulfilled and done by it in order:

            (a)  to enable it to enter into, exercise its rights under, and
                 perform and comply with its obligations under, the Transaction
                 Documents to which it is party and to carry out the
                 transactions contemplated by such Transaction Documents; and

            (b)  to ensure that those obligations are valid, legally binding
                 and, subject to reservations, enforceable in accordance with
                 their terms; and

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<PAGE>

            (c)  to make each of the Transaction Documents to which it is party
                 admissible in evidence in the courts of the jurisdiction to
                 which it has submitted in such Transaction Document (save for
                 any filings or registrations required in relation to the
                 security constituted by the Security Documents, which filings
                 or registrations will be made promptly after execution of the
                 relevant Security Documents and in any event within applicable
                 time limits); and

            (d)  to create the security constituted by the Security Documents to
                 which it is party and, subject to the reservations, to ensure
                 that such security has the ranking specified therein,

    have been taken, fulfilled and done (save, in the case of sub-clause 18.1.3,
    to the extent permitted under sub-clause 15.7.2).

    18.1.4 Consents and Compliance with laws: All consents and filings
           required:

           (a)  for its entry into, exercise of its rights, and performance and
                compliance with its obligations under, each of the Transaction
                Documents to which it is party; and

           (b)  for it to carry out the transactions contemplated by each of the
                Transaction Documents to which it is a party,

    have been obtained or made and are in full force and effect (save for any
    filings or registrations required in relation to the security constituted by
    the Security Documents, which filings or registrations will be made promptly
    after execution of the relevant documents and in any event within applicable
    time limits), except (in the case of any Transaction Document which is not a
    Finance Document) where failure to obtain or make the same or failure of the
    same to be in full force and effect could not reasonably be expected to have
    a Material Adverse Effect.  It and each of its Subsidiaries is in all
    material respects in compliance with all applicable statutes, regulations
    and orders of, and all applicable restrictions imposed by, any and all
    agencies of each of their respective jurisdictions of incorporation or
    operation, except where failure to be in compliance could not reasonably be
    expected to have a Material Adverse Effect.

    18.1.5 Non-Conflict: Its entry into, exercise of its rights under and
           performance and compliance with its obligations under each of the
           Finance Documents to which it is party and the carrying out of the
           transactions contemplated by the Finance Documents do not:

           (a)  contravene any law, directive, judgment or order to which it or
                any of its Subsidiaries is subject;

           (b)  in the case of AOC and Octel Associates, contravene any of the
                Constitutional Documents applicable to it or, in the case of any
                other Group Company, contravene its memorandum or articles of
                association or other constitutional documents;

                                      -46-
<PAGE>

           (c)  breach any agreement or the terms of any consent to which it or
                any of its Subsidiaries is a party or which is binding upon it
                or any of its Subsidiaries or any of its or their respective
                assets, in each case in a manner or to an extent which could
                reasonably be expected to have a Material Adverse Effect;

           (d)  oblige it, or any of its Subsidiaries, to create any security or
                result in the creation of any security over its or their
                respective assets other than under the Security Documents.

     18.1.6 Obligations Binding: Its obligations under the Transaction Documents
            to which it is a party are valid, legally binding and, subject to
            reservations, enforceable and each of the Security Documents to
            which it is party constitute valid security ranking, subject to
            reservations, in accordance with the terms of such documents.

     18.1.7 Winding-up:

            (a)  No administrator, receiver, liquidator or similar officer has
                 been appointed with respect to it or any of its Subsidiaries or
                 its or any of their respective assets nor (so far as it is
                 aware) is any petition or proceeding for any such appointment
                 pending nor has any resolution for any such appointment been
                 passed.

            (b)  In the case of Octel Associates, in addition to the matters
                 referred to in sub-clause 18.1.7(a), no proceedings or other
                 steps have been commenced, and no order has been made, for its
                 dissolution and no other event has occurred which could
                 reasonably be expected to give rise to the dissolution of Octel
                 Associates.

     18.1.8    No Defaults:

            (a)  No Event of Default has occurred and is continuing unwaived.

            (b)  No event has occurred and is continuing unwaived which
                 constitutes a default under any agreement or document to which
                 it or any of its Subsidiaries is a party and which has or could
                 reasonably be expected to have a Material Adverse Effect.

            (c)  No event has occurred and is continuing unwaived which, with
                 the giving of notice or the lapse of time or making of any
                 determination or fulfilment of any condition in each case as
                 provided for in the agreement or document concerned could
                 reasonably be expected to constitute a default, under any
                 agreement or document to which it or any of its Subsidiaries is
                 party and which has or could reasonably be expected to have a
                 Material Adverse Effect.

     18.1.9 Litigation: No litigation, arbitration, administrative, regulatory
            or similar proceeding is current, pending or, to its knowledge,
            threatened:

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<PAGE>

          (a)  to restrain its entry into, the exercise of its rights under and
               performance and compliance with its obligations under, or the
               enforcement by it of, any of the Transaction Documents or the
               carrying out of the transactions contemplated by the Transaction
               Documents); or

          (b)  which has, or is reasonably likely to have, by itself or together
               with any other such proceedings, a Material Adverse Effect.

     18.1.10 Labour Disputes: There are no labour disputes current, pending or,
             to its knowledge, threatened which have or are reasonably likely to
             have a Material Adverse Effect.

     18.1.11 No Security Interests/Guarantees:

             (a)  No Security Interest (or agreement to create the same) exists
                  on or over its or any of its Subsidiaries' assets, other than
                  a Permitted Security Interest (or an agreement to create the
                  same).

             (b)  Neither it nor any of its Subsidiaries has granted or agreed
                  to grant any guarantee, other than a Permitted Guarantee.

     18.1.12 Assets: It or its Subsidiaries have good title to or valid leases
             or licences of or are otherwise entitled to use all material assets
             (including, without limitation, all Intellectual Property)
             necessary to conduct the Business.

     18.1.13 Consents, Licences and Filings for Business Operations: All
             consents, licences and filings have been obtained or effected which
             are necessary for the carrying on of the Business and all such
             consents, licences and filings are in full force and effect and
             there are no circumstances known to it which indicate that any such
             consents, licences and filings are likely to be revoked or varied
             in whole or in part, save in each case to the extent that absence
             of any such consent, licence or filing or revocation or variation
             of any such consent, licence or filing does not and could not
             reasonably be expected to have a Material Adverse Effect.

     18.1.14 Accounts:

             (a)  The audited consolidated financial statements (together with
                  the notes thereto) most recently delivered by or on behalf of
                  the relevant Obligor pursuant to sub-clause 19.6.4(a):

                  (i)  give a true and fair view of the financial position of it
                       and its Subsidiaries as at the date to which they were
                       prepared and for the Financial Year then ended; and

                  (ii) (save as disclosed in the notes thereto) were prepared in
                       accordance with US GAAP (in the case of any such audited
                       consolidated financial statements of the Parent) or UK
                       GAAP (in the case of any such audited consolidated
                       financial statements of Octel Associates).

             (b)  The quarterly unaudited financial statements most recently
                  delivered pursuant to sub-clause 19.6.4(b):

                                      -48-
<PAGE>


                   (i)  reasonably represent the financial position of it and
                        its Subsidiaries as at the date to which they were
                        prepared and for the Accounting Quarter then ended
                        (subject to normal year-end adjustments); and

                   (ii) were prepared on a basis substantially in accordance
                        with US GAAP (in the case of any such quarterly
                        unaudited financial statements of the Parent) or UK GAAP
                        (in the case of any such quarterly unaudited financial
                        statements of Octel Associates).

     18.1.15  Material Adverse Changes:

              (a)  There has been no change in the Business or the assets of the
                   Group since 31 December 1998 which has or is reasonably
                   likely to have a Material Adverse Effect (ignoring any change
                   arising in connection with the Distribution or any of the
                   Transaction Documents or any other change notified to the
                   Facility Agent in writing before the date of this Agreement).

              (b)  There has been no change in the financial condition, business
                   or assets of the Group since the date of the most recently
                   delivered audited consolidated financial statements pursuant
                   to sub-clause 19.6.4(a) which has or is reasonably likely to
                   have a Material Adverse Effect.

     18.1.16  Tax Liabilities:

              (a)  Except to the extent that any Group Company has the benefit
                   of an indemnity from GLCC under the Distribution Documents in
                   respect of such a claim, no claims are being, or are to its
                   knowledge reasonably likely to be, asserted against it or any
                   of its Subsidiaries with respect to Taxes imposed by any
                   government, statutory or public body or agency which are
                   reasonably likely to be determined adversely to it or to such
                   Subsidiary and which, if so adversely determined, would have
                   or be reasonably likely to have a Material Adverse Effect.

              (b)  All reports and returns on which such Taxes are required to
                   be shown have been filed punctually (or within any applicable
                   time limits) and all Taxes required to be paid have been paid
                   when due (or otherwise within any applicable time limit)
                   save, in each case, to the extent that failure to do so does
                   not have and is not reasonably likely to have a Material
                   Adverse Effect.

     18.1.17  Agreed Financial Projections:

              (a)  All material statements of fact relating to the Business
                   which are reflected in the Agreed Financial Projections were
                   true and accurate in all material respects at the date at
                   which the Agreed Financial Projections were prepared.

              (b)  The Agreed Financial Projections represent the honestly held
                   opinions and views as at the date at which the Agreed
                   Financial Projections were

                                      -49-
<PAGE>

                   prepared of Octel Associates, AOC and the Management
                   regarding the future performance of the Business and the
                   other subject mater thereof and were arrived at after careful
                   consideration and were based on reasonable grounds.

              (c)  The projections and forecasts contained in the Agreed
                   Financial Projections were based upon assumptions (including
                   assumptions as to the future performance of the Business,
                   inflation, price increases and efficiency gains) which Octel
                   Associates, AOC and the Management carefully considered and
                   considered to be fair and reasonable as at the date at which
                   the Agreed Financial Projections were prepared.

              (d)  The Agreed Financial Projections do not omit to disclose any
                   matter known to Octel Associates, AOC or Management after due
                   and careful enquiry where failure to disclose such matter
                   would result in the Agreed Financial Projections (or any
                   information or projection contained therein) being misleading
                   in any material respect as at the date at which the Agreed
                   Financial Projections were prepared.

              (e)  Nothing has occurred or come to light since the date as at
                   which the Agreed Financial Projections were prepared which,
                   insofar as the Parent, Octel Associates, AOC or Management is
                   aware, renders any material facts contained therein
                   materially inaccurate or misleading or which makes any of the
                   opinions, projections or forecasts contained therein
                   materially unfair or unreasonable or renders any of the
                   assumptions upon which the projections are based materially
                   unfair or unreasonable.

     18.1.18  Syndication Information Memorandum:

              (a)  The material statements of fact in relation to the assets,
                   financial condition and operations of the Business and the
                   Group contained in the Syndication Information Memorandum
                   were true, complete and accurate in all material respects at
                   the date ascribed thereto in the Syndication Information
                   Memorandum or (if no date is ascribed thereto) at the date of
                   the Syndication Information Memorandum.

              (b)  The opinions and views expressed in the Syndication
                   Information Memorandum represent the honestly held opinions
                   and views of Octel Associates, AOC and Management as at the
                   date of the Syndication Information Memorandum and were
                   arrived at after careful consideration and were based on
                   reasonable grounds.

              (c)  All projections and forecasts contained in the Syndication
                   Information Memorandum were based upon assumptions (including
                   assumptions as to the future performance of the Business,
                   inflation, price increases and efficiency gains) which Octel
                   Associates, AOC and Management carefully considered and
                   considered to be fair and reasonable as at the date of the
                   Syndication Information Memorandum.

                                      -50-
<PAGE>

              (d)  The Syndication Information Memorandum was not misleading at
                   the date thereof in any material respect nor did it omit to
                   disclose any matter failure to disclose which would result in
                   any information contained in the Syndication Information
                   Memorandum being misleading in any respect which could
                   reasonably be expected to be materially adverse to the
                   interests of the Finance Parties under the Finance Documents.

     18.1.19  Latest Accounts:

              (a)  The Latest Accounts were (except as stated in the notes
                   thereto) prepared in accordance with US GAAP consistently
                   applied and give a true and fair view of the results of the
                   operations of the Group for the period to which they relate
                   and the financial position of the Group at the end of such
                   period.

              (b)  The Latest Interim Accounts were prepared on a basis
                   substantially in accordance with US GAAP and reasonably
                   represent the results of the operations of Octel Associates
                   and its Subsidiaries for the period to which they relate and
                   the financial position at the end of such period.

     18.1.20  Other Documents:

              (a)  The Structure Document accurately records the structure of
                   the Group as it will be immediately following the
                   Distribution and the steps taken or to be taken in order to
                   effect the Distribution.

              (b)  The Distribution Documents as furnished to the Facility Agent
                   under this Agreement contain all the material terms of the
                   Distribution.

              (c)  The Senior Note Documents as furnished to the Facility Agent
                   under this Agreement contain all the material terms of the
                   agreements and arrangements between any Group Company and the
                   Senior Noteholders.

              (d)  The Intercompany Loan Agreements as furnished to the Facility
                   Agent under this Agreement contains all the material terms of
                   the agreements and arrangements between Octel Developments
                   and Octel Trading and Octel Trading and Octel Associates (as
                   the case may be) in respect of the Intercompany Loans.

     18.1.21  Intellectual Property: The Intellectual Property it or any of its
              Subsidiaries require in order to conduct its business:

              (a)  is beneficially owned by it or licensed to a member of the
                   Group free from any licences to third parties and Security
                   Interests which are materially prejudicial to the use of that
                   Intellectual Property and will not be adversely affected by
                   the transactions contemplated by the Transaction Documents;

              (b)  has not lapsed or been cancelled and all steps have been
                   taken to protect and maintain such Intellectual Property,
                   including paying renewal fees;

                                      -51-
<PAGE>

              (c)  comprises all Intellectual Property required by it to conduct
                   its business as it is now conducted and, so far as it is
                   aware after due and careful review and enquiry, the Business
                   does not infringe any intellectual property rights of any
                   third party; and

              (d)  where it is subject to any right, permission to use or
                   licence granted to or by any member of the Group, such
                   agreement has not been breached in any material respect or
                   terminated by any party,

     except, in each case, in circumstances or to an extent which could not
     reasonably be expected to have a Material Adverse Effect.

     18.1.22  Environmental Warranties:

              Save as expressly disclosed in the Environmental Report or the
              Legal Report (each as defined in the April 1998 Agreement):

              (a)  it, and each of its Subsidiaries, are and have at all times
                   been, in compliance with all Environmental Laws and all
                   Environmental Approvals necessary in connection with the
                   ownership and operation of their respective businesses are in
                   full force and effect, in each case where failure to do so
                   would have, or be reasonably likely to have, a Material
                   Adverse Effect;

              (b)  to the best of its knowledge and belief having made due and
                   careful enquiry, there are no circumstances which could
                   reasonably be expected to prevent it or any of its
                   Subsidiaries being in compliance with any Environmental Law,
                   including, without limitation, obtaining or being in
                   compliance with any Environmental Approvals, in each case
                   where failure to do so could reasonably be expected to have a
                   Material Adverse Effect;

              (c)  there are no past or present acts or omissions of it or (to
                   the best of its knowledge and belief having made due and
                   careful enquiry) events, state of facts or circumstances
                   which have resulted in (or could reasonably be expected to
                   result in) any third party (including a regulatory authority)
                   taking any action or making any claim against it or any of
                   its Subsidiaries under any Environmental Laws including
                   remedial action (in particular in relation to contaminated
                   land) or the revocation, suspension, variation or non renewal
                   of any Environmental Approval, where such action or claim
                   could reasonably be expected to have a Material Adverse
                   Effect. Neither it nor any of its Subsidiaries has notice of
                   any complaints, demands, civil claims, enforcement
                   proceedings, requests for information, or of any action
                   required by any regulatory authority and there are no
                   investigations pending or threatened in relation to the
                   failure of it or any of its Subsidiaries to obtain any
                   Environmental Approval or comply with Environmental Law in
                   any such case which has or is reasonably likely to have a
                   Material Adverse Effect; and

                                      -52-
<PAGE>

              (d)  neither it, nor any of its Subsidiaries, has any actual or
                   contingent contractual obligation in respect of liabilities
                   arising under Environmental Laws or otherwise in connection
                   with matters pertaining to the Environment, in each case
                   which is material to the interests of the Finance Parties
                   under the Finance Documents.

     18.1.23  Insurance: It and each of its Subsidiaries have in place
              insurances complying with the requirements of sub-clause 19.2.4
              and no act, omission, event or default has occurred which has
              rendered or could reasonably be expected to render any policies of
              insurance taken out by it void or voidable to an extent or in a
              manner which could reasonably be expected to be materially adverse
              to the interests of the Finance Parties under the Finance
              Documents.

     18.1.24  Partners:

              (a)  The Partners are the current partners of Octel Associates and
                   there are no other partners and no other person has any share
                   or interest in the assets of Octel Associates (other than
                   Permitted Security Interests and interests arising under the
                   Finance Documents) other than the Partners.

              (b)  The Constitutional Documents referred to in paragraph (b) of
                   the definition of "Constitutional Documents" in Clause 1.1
                   (Definitions) contain all the material terms of the
                   agreements and arrangements between the Partners in respect
                   of Octel Associates and there is no agreement in relation to
                   the constitution, objects or operation of Octel Associates,
                   other than those Constitutional Documents.

     18.1.25  Governmental Regulation:

              (a)  It is not subject to regulation under the Public Utility
                   Holding Company Act of 1935, the Federal Power Act, the
                   Interstate Commerce Act or the Investment Company Act of
                   1940.

              (b)  It is not subject to regulation under any other federal or
                   state statute or regulation which may limit its ability to
                   incur Financial Indebtedness under the Finance Documents or
                   which may otherwise render all or any portion of the
                   obligations under the Finance Documents unenforceable, in
                   each case to an extent or in a manner which has or could
                   reasonably be expected to have a Material Adverse Effect.

     18.1.26  Employee Benefit Plans:

              (a)  If it is subject to regulation under ERISA, it and each of
                   its ERISA Affiliates are in material compliance with all
                   applicable provisions and requirements of ERISA and the
                   regulations published thereunder with respect to each
                   Employee Benefit Plan.

              (b)  No ERISA Event has occurred or is reasonably expected to
                   occur which has or is reasonably likely to result in a
                   Material Adverse Effect.

                                      -53-
<PAGE>

              (c)  The present value of all accumulated benefit obligations
                   under each Pension Plan (based on the assumptions used for
                   the purposes of U.S. Statement of Financial Accounting
                   Standards No. 87) did not, as of the date of the most recent
                   financial statements reflecting such amounts, exceed the fair
                   market value of the assets of such Pension Plan to an extent
                   which has or is reasonably likely to result in a Material
                   Adverse Effect,

              (d)  The present value of all accumulated benefit obligations of
                   all underfunded Pension Plans (based on the assumptions used
                   for the purposes of U.S. Statement of Financial Accounting
                   Standards No. 87) did not, as of the date of the most recent
                   financial statements reflecting such amounts, exceed the fair
                   market value of the assets of all such underfunded Pension
                   Plans to an extent which has or is reasonably likely to
                   result in a Material Adverse Effect.

     18.1.27  Year 2000 Compliance: It believes:

              (a)  (the Parent having undertaken a comprehensive review and
                   assessment) that all Computer Systems used by any member of
                   the Group are or will be, on a timely basis, Year 2000
                   Compliant; and

              (b)  (having made due enquiry) believes that each of the Group's
                   suppliers and customers which are of material importance to
                   the business and operations of the Group will also, on a
                   timely basis, ensure that their Computer Systems are Year
                   2000 Compliant,

              in each case where failure to be Year 2000 Compliant could
              reasonably be expected to have a Material Adverse Effect.

     18.1.28  Repetition: The representations and warranties in Clause 18.1
              (Representations and Warranties) shall be deemed repeated by each
              Obligor on the date of each Utilisation Request, each Utilisation
              Date and on the last day of each Interest Period by reference to
              the facts and circumstances existing on such date, provided that:

              (a)  the representations and warranties set out in sub-clause
                   18.1.18 shall only be made on the date of the Syndication
                   Information Memorandum;

              (b)  the representations and warranties set out in sub-clauses
                   18.1.8(c) (No Defaults), 18.1.9 (Litigation), 18.1.10 (Labour
                   Disputes), 18.1.15(a) (Material Adverse Changes), 18.1.17
                   (Agreed Financial Projections), 18.1.19 (Latest Accounts),
                   18.1.20 (Other Documents) and 18.1.24 (Partners) shall only
                   be made on the date of this Agreement and only repeated on
                   the first Utilisation Date (if different); and

              (c)  the representations and warranties set out in sub-clauses
                   18.1.1 to 18.1.7 shall in addition be repeated on each date
                   on which an Accession Document is entered into pursuant to
                   sub-clause 5.2.3 or 16.3 (Further

                                      -54-
<PAGE>

                   Guarantors) or additional
                   security is entered into pursuant to Clause 17.2 (Further
                   Security) in respect of the relevant acceding Obligor.


19.  UNDERTAKINGS

19.1 Duration of Undertakings
     The undertakings in this Clause 19 shall continue for so long as any sum
     remains payable or capable of becoming payable under the Finance Documents.

19.2 General Undertakings
     19.2.1   Authorisations and Consents: Each Obligor will, and will procure
              that each of its Subsidiaries will, apply for, obtain and promptly
              renew from time to time and maintain in full force and effect all
              consents and comply with the terms of all such consents, and
              promptly make and renew from time to time all such filings (save
              to the extent permitted under sub-clause 15.7.2), as may be
              required under any applicable law or directive to enable it:

              (a)  to enter into, exercise its rights, and perform and comply
                   with its obligations under the Transaction Documents to which
                   it is party;

              (b)  to carry out the transactions contemplated by the Transaction
                   Documents to which it is a party;

              (c)  to ensure that its obligations under the Transaction
                   Documents to which it is party are valid, legally binding
                   and, subject to reservations, enforceable; and

              (d)  to ensure that each of the Security Documents to which it is
                   party constitutes valid security ranking, subject to the
                   reservations, in accordance with its terms,

              except (in the case of any Transaction Document which is not a
              Finance Document) where failure to do so could not reasonably be
              expected to have a Material Adverse Effect.

     19.2.2   Maintenance of Status and Authorisation: Each Obligor will, and
              will procure that each of its Subsidiaries will:

              (a)  do all such things as are necessary to maintain its corporate
                   (or, in the case of Octel Associates, its partnership)
                   existence;

              (b)  ensure that it has the right and is duly qualified to conduct
                   its business and will obtain and maintain all material
                   consents and make all material filings necessary for the
                   conduct of such business and take all steps necessary to
                   ensure that the same are in full force and effect except
                   where failure to do so could not reasonably be expected to
                   have a Material Adverse Effect; and

              (c)  comply with all laws, regulations and directives binding upon
                   it and procure compliance by all of its respective officers
                   and employees with all applicable laws, regulation and
                   directives except where failure to be in

                                      -55-
<PAGE>

                   compliance could not reasonably be expected to have a
                   Material Adverse Effect;

     19.2.3   Pari Passu Ranking: Each Obligor will ensure that its payment
              obligations under each of the Finance Documents rank and will at
              all times rank at least pari passu in right and priority of
              payment with all its other present and future unsecured and
              unsubordinated indebtedness (actual or contingent), except
              indebtedness preferred solely by operation of law.

     19.2.4   Insurances:

              (a)  Each Obligor will, and will procure that each of its
                   Subsidiaries (other than any Dormant Company) will, effect
                   and thereafter maintain insurances in respect of all its
                   material assets and business of an insurable nature with
                   reputable insurers of good standing. Such insurances must:

                   (i)    provide cover against all risks which are normally
                          insured against by other companies owning or
                          possessing similar assets or carrying on similar
                          business;

                   (ii)   be in such amounts as would in the circumstances be
                          prudent for such companies taking into account the
                          size and nature of the business carried on, and the
                          assets owned, by such companies and the jurisdictions
                          in which such businesses are carried on and such
                          assets located;

                   (iii)  in the case of the Group's property damage and
                          business interruption insurance policies, be in the
                          joint names of Octel Associates and/or the owner of
                          the relevant assets and the Security Agent and:

                          (1)  provide that the insurance shall not be rendered
                               void, voidable or unenforceable by reason of any
                               non-disclosure by the Security Agent, that the
                               insurer will give not less than 28 days written
                               notice to the Security Agent of any intention to
                               avoid such insurance and that the Security Agent
                               shall not in any circumstances be liable for the
                               relevant premium; and

                          (2)  contain a loss payee clause providing that all
                               moneys payable in excess of $2,500,000 (or its
                               equivalent in other currencies) shall be paid to
                               (or to the order of) the Security Agent (for
                               application in accordance with Clause 14.6
                               (Insurances) of the April 1998 Agreement), which
                               shall alone be entitled to give a good discharge
                               therefor; and

                   (iv)   in the case of any other Material Insurance, have the
                          interest of the Security Agent as mortgagee noted on
                          the relevant policy on or before the date falling two
                          months after the date of this Agreement.

              (b)  Each Obligor will, and will procure that each of its
                   Subsidiaries (other than any Dormant Company) will:

                                      -56-
<PAGE>

                   (i)    supply to the Facility Agent on reasonable notice
                          copies of each Material Insurance required to be
                          maintained in accordance with sub-clause 19.2.4(a)(1)
                          and (2) above, together with the current premium
                          receipts relating thereto (or other evidence of the
                          existence of each such policy and the payment of
                          related premiums as the Facility Agent (acting
                          reasonably) may accept);

                   (ii)   promptly notify the Facility Agent in writing of any
                          material change to its cover in respect of Material
                          Insurances from time to time; and

                   (iii)  promptly notify the Facility Agent in writing of any
                          claim under any of its insurance policies which is
                          for, or is reasonably likely to result in a claim
                          under such policy for, an amount in excess of
                          $2,500,000 (or its equivalent in other currencies).

     19.2.5   Taxes: Each Obligor will, and will procure that each of its
              Subsidiaries will, pay when due (or within any applicable time
              limit) all Taxes imposed by any government, statutory or public
              body or agency upon it or any of them or any of its or their
              assets, income or profits or any transactions undertaken or
              entered into by it or any of them, except where:

              (a)  (and for so long as) the liability to pay any such Taxes is
                   being contested by that Obligor in good faith and by
                   appropriate means and proper provision or reserve for that
                   liability has been made by that Obligor; or

              (b)  failure to pay such amount could not reasonably be expected
                   to have a Material Adverse Effect.

     19.2.6   Hedging Arrangements:

              (a)  Each Borrower will ensure, and each Hedging Bank agrees,
                   that:

                   (i)    any Hedging Agreement to which it is at any time party
                          will be in the form of the ISDA 1992 Master Agreement
                          and will provide for "Second Method" and "Market
                          Quotation" in the event of a termination of any
                          hedging transaction entered into under such Hedging
                          Agreement whether upon a termination event or an Event
                          of Default (as defined therein);

                   (ii)   if, on termination of any hedging transaction under
                          any Hedging Agreement to which any Borrower is a
                          party, a settlement amount or other amount falls due
                          from a Hedging Bank to any Borrower then, if the
                          security constituted by the Security Documents has
                          become enforceable, that amount shall be paid by such
                          Hedging Bank to the Security Agent and treated as
                          proceeds of enforcement of the security conferred by
                          the Security Documents for application in the order
                          prescribed in this Agreement;

                   (iii)  until service of a notice by the Facility Agent under
                          Clause 20.3 (Cancellation and Repayment), no Hedging
                          Bank will exercise any

                                      -57-
<PAGE>

                          right it might otherwise have pursuant to any Hedging
                          Agreement to terminate any hedging transactions under
                          that Hedging Agreement or to refuse to make any
                          payment due from it thereunder; and

                   (iv)   each Hedging Bank will, promptly after the Facility
                          Agent has served a notice under Clause 20.3
                          (Cancellation and Repayment), exercise any and all
                          rights it may have to terminate the hedging
                          transactions under each Hedging Agreement to which it
                          is party, unless the Facility Agent (acting on the
                          instructions of the Majority Banks) otherwise agrees
                          or requires.

     19.2.7   Banking Business: Each Obligor will, and will procure that each of
              its Subsidiaries will, only maintain bank accounts with Banks or
              Approved Banks.

19.3 General Restrictions:

     19.3.1   Amalgamations and Change of Business: No Obligor will, and each
              Obligor will procure that none of its Subsidiaries will, except
              with the prior written approval of the Majority Banks:

              (a)  amalgamate, merge or consolidate with or into any other
                   person; or

              (b)  materially change the nature of the business of the Group as
                   a whole.

     19.3.2   Arm's Length Transactions:

              (a)  No Obligor will, and each Obligor will procure that none of
                   its Subsidiaries will, enter into any arrangement or
                   transaction (an "Affiliate Transaction") with any of its
                   Affiliates or any shareholder of it or any of its Affiliates
                   (each a "connected person"), unless:

                   (i)    the terms of that Affiliate Transaction are no less
                          favourable to the relevant Group Company than those
                          terms that could be obtained at the time of that
                          Affiliate Transaction in arm's length dealings with a
                          person who is not such a connected person; or

                   (ii)   that Affiliate Transaction (together with any other
                          Affiliate Transaction which is related thereto,
                          whether entered into at the same time or over a period
                          of time) involves an amount not exceeding $500,000.

              (b)  Sub-clause 19.3.2(a) shall not prohibit:

                   (i)    arrangements or transactions pursuant to the
                          Transaction Documents;

                   (ii)   disposals permitted under sub-clause 22.3.(d)
                          (Disposals) of the April 1998 Agreement;

                   (iii)  intercompany credit or loans permitted under sub-
                          clause 22.3(j) (Loans) of the April 1998 Agreement;

                                      -58-
<PAGE>

               (iv) issues of shares or relevant securities permitted under
                    sub-clause 19.4.1 (Control);

               (v)  arrangements or transactions where the party receiving the
                    benefit of the transaction being on less than arm's length
                    terms is an Obligor which has entered into Security
                    Documents constituting Security Interests over all or
                    substantially all of its assets; or

               (vi) arrangements or transactions approved by the Majority Banks.

     19.3.3 Distribution Documents: The Parent will not, and will procure that
            none of its Subsidiaries will, amend, vary or waive any of the terms
            of the Distribution Documents without the prior written consent of
            the Majority Banks or exercise any discretion arising thereunder or
            give any consent thereunder without the prior written consent of the
            Majority Banks, except where the same is not materially prejudicial
            to the interests of any Finance Party under the Finance Documents.

     19.3.4 Disposals: [Note: There is a restriction on disposals under Clause
            22.3(d) (Disposals) of the April 1998 Agreement which benefits the
            Finance Parties. This restriction will continue to apply
            notwithstanding the repayment of amounts outstanding under the April
            1998 Agreement. The Obligors have agreed in Clause 30.5 (Changes to
            April 1998 Agreement) not to amend such clause without the prior
            written consent of the Majority Banks.]

     19.3.5 Disposals for Full Consideration: [Note: There is a restriction on
            disposals under Clause 22.3(e) (Disposals for Full Consideration) of
            the April 1998 Agreement which benefits the Finance Parties. This
            restriction will continue to apply notwithstanding the repayment of
            amounts outstanding under the April 1998 Agreement. The Obligors
            have agreed in Clause 30.5 (Changes to April 1998 Agreement) not to
            amend such clause without the prior written consent of the Majority
            Banks.]

     19.3.6 Negative Pledge: No Obligor will, and each Obligor will procure that
            none of its Subsidiaries will, create or agree to create or permit
            to subsist any Security Interest on or over the whole or any part of
            its undertaking or assets (present or future), except for:

            (a)  liens arising solely by operation of law and in the ordinary
                 course of business;

            (b)  rights of set-off existing in the ordinary course of trading
                 activities between any member of the Group and its respective
                 suppliers or customers;

            (c)  rights of set-off arising by operation of law or by contract by
                 virtue of the provision to any member of the Group of clearing
                 bank facilities, overdraft facilities or hedging facilities
                 permitted under this Agreement;

                                      -59-
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            (d)  any retention of title to goods supplied to any member of the
                 Group where such retention is required by the supplier in the
                 ordinary course of its trading activities and on its standard
                 terms and the goods in question are supplied on credit;

            (e)  Security Interests (except for any Security Interest expressed
                 to be created as a floating charge) arising under finance
                 leases, hire purchase, conditional sale agreements or other
                 agreements for the acquisition of assets on deferred payment
                 terms permitted under sub-clause 19.3.11 and only to the extent
                 such Security Interests are granted by the relevant Obligor
                 over assets comprised within or constituted by such
                 arrangements;

            (f)  Security Interests arising under the Security Documents;

            (g)  Security Interests existing at the time of acquisition on or
                 over any asset acquired by it after the date of this Agreement
                 or, in the case of a person which becomes a member of the Group
                 after the date of this Agreement, any Security Interest
                 existing on or over its assets when it became a member of the
                 Group, in each case where such Security Interest was not
                 created in contemplation of or in connection with that
                 acquisition or, as the case may be, it becoming a member of the
                 Group;

            (h)  any Security Interest to which the Majority Banks have given
                 their prior written consent; or

            (i)  Security Interests (except for any Security Interest expressed
                 to be created as a floating charge) created otherwise then
                 pursuant to sub- clauses 19.3.6(a) to 19.3.6(h) (inclusive)
                 above securing Financial Indebtedness not exceeding an
                 aggregate amount of $2,500,000 (or its equivalent in other
                 currencies) at any time.

     19.3.7 Factoring: [Note: There is a restriction on factoring under Clause
            22.3(g) (Factoring) of the April 1998 Agreement which benefits the
            Finance Parties. This restriction will continue to apply
            notwithstanding the repayment of amounts outstanding under the April
            1998 Agreement. The Obligors have agreed in Clause 30.5 (Changes to
            April 1998 Agreement) not to amend such clause without the prior
            written consent of the Majority Banks.]

     19.3.8 Indebtedness: No Obligor will, and each Obligor will procure that
            none of its Subsidiaries will, incur or agree to incur or permit to
            subsist any Financial Indebtedness other than Permitted
            Indebtedness. For this purpose, "Permitted Indebtedness" means:

            (a)  Financial Indebtedness arising under the Transaction Documents,
                 provided that:

                 (i)  the maximum aggregate principal amount of the Senior Notes
                      shall at no time exceed $150,000,000; and

                                      -60-
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                 (ii) the maximum aggregate principal amount outstanding under
                      the Barclays Facility Letter shall at no time exceed
                      $20,000,000 (or its equivalent in other currencies);

            (b)  Financial Indebtedness permitted by sub-clauses 19.3.9, 19.3.11
                 and 19.3.12 hereof and Clause 22.3(j) of the April 1998
                 Agreement;

            (c)  Financial Indebtedness incurred under unsecured overdraft and
                 working capital facilities (including hedging, foreign exchange
                 and guarantee facilities) in an aggregate principal amount
                 which, when aggregated with the aggregate principal amount
                 outstanding under the Barclays Facility Letter at the same
                 time, does not exceed $30,000,000 (or its equivalent in other
                 currencies);

            (d)  Financial Indebtedness incurred under the unsecured settlement
                 facility (comprising BACS and Business Master facilities) made
                 available by Barclays Bank PLC to AOC in an aggregate principal
                 amount not exceeding (Pounds)17,600,000;

            (e)  Financial Indebtedness incurred under unsecured overdraft and
                 working capital facilities in respect of which a Letter of
                 Credit (as defined in the April 1998 Agreement) or Bank
                 Guarantee (as defined in the April 1998 Agreement) (in an
                 amount not less than the maximum principal amount of such
                 facilities) has been issued under the Tranche B Facility made
                 available under the April 1998 Agreement;

            (f)  any Financial Indebtedness to which the Majority Banks have
                 given their prior written consent;

            (g)  any Financial Indebtedness not falling within sub-clauses
                 19.3.8(a) - 19.3.8(f) (inclusive) or sub-clause 19.3.8(h), the
                 aggregate principal amount of which for the Group taken as a
                 whole does not at any time exceed $2,500,000 (or its equivalent
                 in other currencies); or

            (h)  any Financial Indebtedness the proceeds of which are applied in
                accordance with Clause 14.3(b) of the April 1998 Agreement;

     19.3.9 Guarantees: No Obligor will and each Obligor will procure that none
            of its Subsidiaries will, grant or agree to grant or permit to
            subsist any guarantee by it, other than a Permitted Guarantee. For
            this purpose, "Permitted Guarantee" means:

            (a)  guarantees given in the ordinary course of business in respect
                 of any obligations of Octel Resources or any wholly-owned
                 Subsidiary of Octel Resources;

            (b)  guarantees contained in this Agreement or any Transaction
                 Document;

            (c)  any guarantee issued during an Accounting Quarter in connection
                 with a Permitted Investment the maximum liability under which
                 (when

                                      -61-
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                 aggregated (without double-counting) with the other items in
                 respect of the Permitted Investment specified in paragraph (b)
                 of the definition of "Permitted Investment" in Clause 1.1
                 (Definitions)) does not exceed the relevant Unutilised
                 Available Amount in respect of that Accounting Quarter at the
                 relevant time; or

            (d)  any guarantee to which the Majority Banks have given their
                 prior written consent; or

            (e)  any guarantees not falling within sub-clauses (a) to (d)
                 (inclusive) above, the maximum aggregate actual or contingent
                 liability under which the Group taken as a whole does not at
                 any time exceed $2,500,000 (or its equivalent in other
                 currencies).

     19.3.10 Loans: [Note: There is a restriction on loans under Clause 22.3(j)
             (Loans) of the April 1998 Agreement which benefits the Finance
             Parties. This restriction will continue to apply notwithstanding
             the repayment of amounts outstanding under the April 1998
             Agreement. The Obligors have agreed in Clause 30.5 (Changes to
             April 1998 Agreement) not to amend such clause without the prior
             written consent of the Majority Banks.]

     19.3.11 Leasing Arrangements: No Obligor will, and each Obligor will
             procure that none of its Subsidiaries will, enter into or have
             outstanding any Financial Indebtedness of a type described in
             paragraph (e) or (g) of the definition of "Financial Indebtedness"
             in Clause 1.1 (Definitions) (which, for the avoidance of doubt,
             shall not include operating leases) except where the aggregate
             capital element of all future rentals during any Financial Year of
             the Parent under all such Financial Indebtedness (determined in
             accordance with US GAAP) does not exceed $2,500,000 (or its
             equivalent in other currencies).

     19.3.12 Hedging Transactions: No Group Company will enter into any interest
             rate swap, cap, ceiling, collar or floor or any currency swap,
             futures, foreign exchange or commodity contract or option, other
             than:

             (a)  the Hedging Agreements; or

             (b)  for hedging interest rate, currency or commodity exposure
                  entered into by a Group Company in the ordinary course of its
                  business (and not for speculative purposes).

     19.3.13 Joint Ventures: No Group Company will except with the prior written
             consent of the Majority Banks, enter into or permit to subsist any
             joint venture, partnership or equivalent arrangement with any
             person, other than:

             (a)  any such joint venture, partnership or equivalent arrangement
                  subsisting at the date of this Agreement; or

             (b)  any Permitted Investment, provided that, in connection with
                  the making of any Permitted Investment, no Group Company shall
                  incur any liability (whether contractual or otherwise) (an
                  "ancillary liability") (excluding

                                      -62-
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                  for this purpose any liability in respect of Financial
                  Indebtedness the amount of which has been included in the
                  calculation of the Available Amount in respect of the
                  Accounting Quarter in which that Permitted Investment is made)
                  where that ancillary liability has or could reasonably be
                  expected to have a Material Adverse Effect; or

             (c)  commercial contracts entered into in the ordinary course of
                  trading not involving the acquisition of shares or similar
                  investments or interests in partnerships.

     19.3.14 Acquisitions and Investments: No Group Company will:

             (a)  acquire any real property or business or acquire any
                  Subsidiary or the whole or substantially the whole of the
                  assets of any other person or enter into any agreement so to
                  do; or

             (b)  own any interest in any share or equity related investment,

             in each case, without the prior written consent of the Majority
             Banks, save for:

                  (i)  pursuant to the Distribution Documents;

                  (ii) any shares or partnership interests owned by it in
                       entities which are at the date of this Agreement (and
                       which at the relevant time remain) its Subsidiaries or
                       Part Owned Entities, or in any Subsidiary formed after
                       the date of this Agreement;

                  (iii)any acquisition by a Group Company pursuant to a disposal
                       permitted under sub-clause 19.3.4;

                  (iv) any acquisition of Cash Equivalents for treasury
                       management purposes;

                  (v)  a Permitted Investment; or

                  (vi) any other acquisition of any business, assets or shares
                       in a limited liability company carrying on any business
                       similar to or connected with (or related to the
                       development of) the Business, provided that the aggregate
                       of:

                       (1)  all amounts paid or to be paid during an Accounting
                            Quarter in connection with such acquisition; and

                       (2)  the liabilities assumed or incurred during an
                            Accounting Quarter in respect of Financial
                            Indebtedness (whether by way of novation, guarantee
                            or otherwise) by any member of the Group in
                            connection with or as a result of that acquisition,

                       does not exceed the Unutilised Available Amount in
                       respect of that Accounting Quarter at the relevant time,
                       and provided further that, in connection with the making
                       of that acquisition, no Group

                                      -63-
<PAGE>

                       Company shall incur any liability (whether contractual or
                       otherwise) (an "ancillary liability") (excluding for this
                       purpose any liability in respect of Financial
                       Indebtedness the amount of which has been included in the
                       calculation of the Available Amount in respect of that
                       Accounting Quarter) where that ancillary liability has or
                       could reasonably be expected to have a Material Adverse
                       Effect.

19.4 Shares and Share Capital:

     19.4.1 Control: No Obligor will, and each Obligor will procure that none of
            its Subsidiaries will, except with the prior written consent of the
            Majority Banks, allot or issue any shares or any relevant securities
            (as defined in Section 80(2) of the Companies Act 1985) other than:

            (a)  an issue of shares or relevant securities expressly referred to
                 in the Distribution Documents;

            (b)  by one member of the Group to another member of the Group which
                 is Octel Resources or a wholly-owned Subsidiary of Octel
                 Resources;

            (c)  by Octel America to the Parent;

            (d)  an issue of shares in the Parent the proceeds of which are
                 applied in accordance with Clause 14.3(a) of the April 1998
                 Agreement; or

            (e)  pursuant to any Employee Share Scheme.

     19.4.2 Variation of Documents: No Obligor will, and each Obligor will
            procure that none of its Subsidiaries will, without the prior
            written consent of the Majority Banks, agree to any amendment or
            variation to the terms of:

            (a)  any of the Constitutional Documents which could reasonably be
                 expected to:

                 (i)  affect the partnership structure of Octel Associates; or

                 (ii) be materially adverse to the interests of the Finance
                      Parties under the Finance Documents; or

            (b)  any of the Senior Note Documents or the Intercompany Loan
                 Agreements (as defined in the April 1998 Agreement), provided
                 that Octel Developments may agree with the trustee for the
                 Senior Noteholders minor or technical amendments to the Senior
                 Note Documents (not being adverse to the interests of the
                 Majority Banks) without the consent of the Majority Banks.

     19.4.3 Restriction on Payment of Dividends: The Parent will not pay,
            directly or indirectly, any dividend or make any other distribution
            or pay any interest or other amount, whether in cash or otherwise,
            on any shares or relevant securities (as defined in Section 80(2) of
            the Companies Act 1985) or set apart any sum for any such purpose,
            provided that the Parent may pay any dividend on the stock issued by
            it if (and only if) each of the following conditions is met:

                                      -64-
<PAGE>

            (a)  that dividend is paid following delivery to the Facility Agent
                 of the unaudited consolidated management accounts of the Parent
                 for the last complete Accounting Quarter ending prior to the
                 date of the dividend payment;

            (b)  that dividend is paid following delivery to the Facility Agent
                 of the compliance certificate required to be delivered under
                 sub-clause 19.6.5(a) at the same time as the accounts referred
                 to in sub-clause 19.4.3(a) demonstrating compliance with Clause
                 19.7 (Financial Covenants);

            (c)  the Parent has not received notice from any Agent certifying
                 that an Event of Default or Potential Event of Default has
                 occurred and is continuing or would occur as a result of paying
                 that dividend;

            (d)  the Facility Agent has received 5 Business Days' notice of the
                 intention to make that dividend payment and the amount of that
                 payment; and

            (e)  the amount of the dividend payment does not exceed the
                 Unutilised Available Amount at the relevant time in respect of
                 the Accounting Quarter in which that dividend payment is made.

     19.4.4 Restriction on Redemption and Acquisition of Own Shares: The Parent
            will not directly or indirectly redeem, purchase, retire or
            otherwise acquire for consideration any shares, stock or warrants
            issued by it or set apart any sum for any such purpose (other than
            for the purpose of any Employee Share Scheme) or otherwise reduce
            its capital, in each case without the consent of the Majority Banks,
            provided that the Parent may purchase or otherwise acquire any stock
            issued by it if (and only if) each of the following conditions is
            met:

           (a)  the consideration for any such purchase or other acquisition is
                paid following delivery to the Facility Agent of the unaudited
                consolidated management accounts of the Parent for the last
                complete Accounting Quarter ending prior to the date of the
                payment of that consideration;

           (b)  the consideration for any such purchase or other acquisition is
                paid following delivery to the Facility Agent of the compliance
                certificate required to be delivered under sub-clause 19.6.5(a)
                at the same time as the accounts referred to in sub-clause
                19.4.4(a) demonstrating compliance with Clause 19.7;

           (c)  the Parent has not received notice from any Agent certifying
                that an Event of Default or Potential Event of Default has
                occurred and is continuing or would occur as a result of that
                purchase or other acquisition;

           (d)  the Facility Agent has received 5 Business Days' notice of the
                intention to make that that purchase or other acquisition and
                the amount of the consideration for it; and

           (e)  the aggregate consideration for that purchase or other
                acquisition does not exceed the Unutilised Available Amount at
                the relevant time in respect of

                                      -65-
<PAGE>

                the Accounting Quarter in which that purchase or other
                acquisition is made.

     19.4.5 Cashflow Restrictions: No Obligor will, and each Obligor will
            procure that none of its Subsidiaries will, be a party to any
            contractual arrangement pursuant to which any member of the Group is
            prohibited from making any payment of dividends or other cash
            distributions on its share capital, other than the Finance Documents
            and the Senior Note Documents.

     19.4.6 Payment Restrictions: [Note: There is a restriction on the making of
            certain payments under Clause 22.4(f) (Payment Restrictions) of the
            April 1998 agreement which benefits the Finance Parties. This
            restriction will continue to apply notwithstanding the repayment of
            amounts outstanding under the April 1998 Agreement. The Obligors
            have agreed in Clause 30.5 (Changes to the April 1998 Agreement) not
            to amend such clause without the prior written consent of the
            Majority Banks.]

     19.4.7 Holding Companies: The Parent shall not, and shall procure that
            neither Octel Developments nor any Holding Company of Octel
            Developments, shall:

            (a)  carry on any trading activities related to the Business; or

            (b)  own any assets required for use in the Business;

     19.4.8 Redemption or Purchase of Senior Notes: Octel Developments shall
            not, and the Parent shall procure that no other member of the Group
            will, save as permitted under sub-clause 22.4(f) of the April 1998
            Agreement:

            (a)  repay, redeem, prepay (by defeasance or otherwise) or otherwise
                 retire the principal amount of the Senior Notes; or

            (b)  purchase, repurchase, acquire or agree to acquire (or procure
                 any other person to acquire on its account) all or any part of
                 the Senior Notes.

19.5 Environmental Undertakings:
     Each Obligor will, and will procure that each of its Subsidiaries will:

     19.5.1 comply with the terms and conditions of all Environmental Approvals
            and all Environmental Laws applicable to it where failure so to do
            would have or be reasonably likely to have a Material Adverse Effect
            and will implement procedures to monitor compliance and contain
            liability under any Environmental Laws;

     19.5.2 promptly upon receipt of the same after the date of this Agreement,
            notify the Facility Agent of any claim, notice or other
            communication served on it in respect of or if it becomes aware of:

            (a)  any suspension, revocation or material variation of any
                 Environmental Approval applicable to it (save where such
                 suspension or revocation arises by reason of and is immediately
                 followed by the issue of an

                                      -66-
<PAGE>

                 Environmental Approval in substantially the same terms) which
                 would have or be reasonably likely to have a Material Adverse
                 Effect; or

            (b)  any breach of any Environmental Laws by a Group Company which
                 has or is reasonably likely to have a Material Adverse Effect;
                 or

            (c)  any material unbudgeted investment by a Group Company required
                 to maintain, acquire or renew any Environmental Approval; or

            (d)  the issue of any enforcement or prohibition or similar notice
                 by a regulatory authority or receipt by any member of the Group
                 of any complaint, demand, civil claim or enforcement proceeding
                 which has or is reasonably likely to have a Material Adverse
                 Effect; and

     19.5.3 use all reasonable endeavours (by employing the best available
            techniques not involving excessive cost) to prevent any acts,
            omissions, events, state of facts or circumstances occurring or
            being exacerbated which could result in any third party taking any
            action or making any claim against any member of the Group under any
            Environmental Laws where any such action or claim could reasonably
            be expected to have a Material Adverse Effect.

19.6 Information and Accounting Undertakings:

     19.6.1 Events of Default: Each Group Company (through the Obligors' Agent)
            will promptly notify the Facility Agent of the occurrence of any
            Event of Default or Potential Event of Default and each Group
            Company will from time to time on reasonable request deliver to the
            Facility Agent a certificate from one of its directors confirming
            that no Event of Default or Potential Event of Default has occurred
            and is continuing or setting out details of any Event of Default or
            Potential Event of Default and the action taken or proposed to be
            taken to remedy it.

     19.6.2 Books of Account: Each Group Company will keep proper books of
            account relating to its business and will permit the Facility Agent
            or any authorised representative of the Facility Agent upon
            reasonable notice and at reasonable times to visit it and inspect
            the same at the place where they are maintained.

     19.6.3 Appointment of Auditors: Except with the prior written consent of
            the Majority Banks, no Group Company will appoint any auditors other
            than Price Waterhouse, Ernst & Young, Coopers & Lybrand, KPMG,
            Arthur Andersen or Deloitte & Touche or any amalgamation of the same
            or their successors.

     19.6.4 Financial Statements: The Parent (or, as the case may be, Octel
            Associates) will deliver to the Facility Agent for distribution to
            the Banks sufficient copies for each of the Banks of the following:

            (a)  as soon as available and in any event within 110 days after the
                 end of each of its Financial Years, the audited consolidated
                 financial statements of the Group and the audited consolidated
                 financial statements of Octel Associates for that Financial
                 Year;

                                      -67-
<PAGE>

            (b)  as soon as available and in any event within 45 days of the end
                 of each Accounting Quarter, the quarterly unaudited financial
                 statements of the Group and the quarterly unaudited financial
                 statements of Octel Associates and its Subsidiaries as at the
                 end of and for that Accounting Quarter; and

            (c)  not less than 60 days after the beginning of each of its
                 Financial Years, the Operating Budget for such Financial Year;

            such accounts, Operating Budget and update to the Operating Budget:

                 (i)   in the case of audited annual financial statements:

                       (1)  in respect of the Parent, to be in the form of, and
                            contain the same information as a Form 10K; and

                       (2)  in respect of Octel Associates, to include a profit
                            and loss account, balance sheet, cash-flow statement
                            and directors' and auditors' report thereon;

                 (ii)  in the case of quarterly unaudited financial statements:

                       (1)  in respect of the Parent, to be in the form of and
                            contain the same information as a Form 10Q; and

                       (2)  in respect of Octel Associates, to include a profit
                            and loss account, balance sheet, cash-flow
                            statement;

                 (iii) in the case of the Operating Budget, to be in a format
                       and with a level of information reasonably satisfactory
                       to the Facility Agent,

    and, in each case, to have been approved by the chief financial officer of
    the Parent or Octel Associates (as the case may be) (or another officer
    acceptable to the Facility Agent).

                                      -68-
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    19.6.5 Financial Covenant Compliance Certificates/Management Meetings:

           (a) Each of the annual financial statements of the Parent and each of
               the quarterly financial statements of the Parent for an
               Accounting Quarter delivered under sub-clause 19.6.4 must be
               accompanied by a certificate signed by the chief financial
               officer of the Parent (or other officer acceptable to the
               Facility Agent) and another director of the Parent certifying
               whether or not, as at the date of the relevant accounts, the
               Parent was in compliance with the financial covenants contained
               in Clause 19.7 (Financial Covenants) (such certificate to contain
               reasonably detailed calculations acceptable to the Facility Agent
               demonstrating such compliance) confirming that, as at that date,
               no Event of Default or Potential Event of Default had occurred or
               giving details of any Event of Default or Potential Event of
               Default which has occurred and the action taken or proposed to be
               taken to remedy it.

           (b) Each of the annual audited financial statements of the Parent
               delivered under sub-clause 19.6.4(a) above must be accompanied by
               a certificate from the Auditors (in such form and with such level
               of detail as the Facility Agent may reasonably require):

               (i)  demonstrating whether or not as at the date of such
                    financial statements the Parent was in compliance with the
                    financial covenants contained in Clause 19.7 (Financial
                    Covenants); and

               (ii) confirming the ratio of Total Debt to EBITDA (together with
                    a calculation of how that ratio has been determined) for the
                    purpose of Clause 14.7 (Surplus Cash Flow) of the April 1998
                    Agreement and the definition of Available Amount in Clause
                    1.1. (Definitions).

           (c) Each of the quarterly financial statements of the Parent
               delivered under Sub-clause 19.6.4.(b) above must be accompanied
               by a certificate signed by the chief financial officer of the
               Parent (or other officer acceptable to the Facility Agent) and
               another director of the Parent (in such form and with such level
               of detail as the Facility Agent may reasonably require)
               confirming:

               (i)  the amount of Surplus Cash Flow (together with a calculation
                    of how that amount has been determined) for the purposes of
                    Clause 14.7 (Surplus Cash Flow) of the April 1998 Agreement,
                    and the definition of Available Amount in Clause 1.1
                    (Definitions); and

               (ii) the ratio of Total Debt to EBITDA (together with a
                    calculation of how that ratio has been determined) for the
                    purposes of Clause 14.7 (Surplus Cash Flow) of the April
                    1998 Agreement and the definition of Available Amount in
                    Clause 1.1. (Definitions).

           (d) The Facility Agent acting on the instructions of the Majority
               Banks shall be entitled to call for meetings with Management
               twice in each Financial

                                      -69-
<PAGE>

               Year of the Parent to discuss financial information delivered
               under sub- clause 19.6.4 on reasonable prior written notice and
               at times reasonably convenient to Management.

   19.6.6 Accounting Reference Date: No alteration may be made to the
          Financial Year end of the Parent without the prior written consent of
          the Facility Agent acting on the instructions of the Majority Banks
          (in which event the Facility Agent may require such changes to the
          financial covenants contained in this Agreement as will fairly reflect
          such change) and the Parent shall procure that the Financial Year end
          of each of its Subsidiaries shall be the same as its own.

   19.6.7 Other Information: Each Group Company will promptly deliver to the
          Facility Agent for distribution to the Banks:

          (a)  details of any litigation, arbitration, administrative or
               regulatory proceedings which, if resolved against it, would
               result or be reasonably likely to (whether itself or together
               with any related claims) result in the Group suffering a loss in
               excess of $2,500,000 (or its equivalent in other currencies) or
               would have or be reasonably likely to have a Material Adverse
               Effect;

          (b)  details of any labour dispute affecting it which has or is
               reasonably likely to have a Material Adverse Effect;

          (c)  at the same time as sent to its creditors or shareholders, any
               other document or information sent to all or any class of its
               creditors or shareholders (excluding for this purpose creditors
               which are members of the Group);

          (d)  such other information relating to its financial condition or
               operation as the Facility Agent (or any other Bank through the
               Facility Agent) may from time to time reasonably request (except
               where the information is subject to confidentiality obligations
               owed to a person outside the Group and the relevant Group Company
               has used all reasonable endeavours to have that confidentiality
               obligation waived in respect of that information, but without
               success);

          (e)  details of any breach of the provisions of any of the Senior Note
               Documents or the Intercompany Loan Agreements by any party
               thereto of which it is aware;

          (f)  details of any breach of the provisions of any of the
               Distribution Documents by any parts thereto of which it is aware
               where such breach could reasonably be expected to be material to
               the interests of the Finance Parties under the Finance Documents;

          (g)  details of any Subsidiary formed by it; and

          (h)  details of any Group Company which becomes, or ceases to be, a
               Material Group Company after the date of this Agreement.

                                      -70-
<PAGE>

   19.6.8 Approved Accounting Principles: All financial statements of the
          Parent delivered or to be delivered to the Facility Agent under this
          Agreement shall be prepared in accordance with the Approved Accounting
          Principles. If as a result of a change in accounting principles such
          financial statements are required to be prepared on a different basis
          (and that difference is or could reasonably be expected to be relevant
          to the calculation of the financial ratios under this Agreement or
          otherwise material to the interests of the Finance Parties under this
          Agreement):

          (a)  the Obligors' Agent shall, as soon as reasonably practicable
               after becoming aware of that change, so advise the Facility
               Agent;

          (b)  on request of the Facility Agent, the Obligors' Agent and the
               Facility Agent (on behalf of the Banks) shall negotiate in good
               faith with a view to agreeing such amendments to Clause 19.7
               (Financial Covenants) and/or the definitions of any or all of the
               terms used therein as are necessary to give the Banks comparable
               protection to that contemplated at the date of this Agreement;

          (c)  if amendments satisfactory to the Banks are agreed by the
               Obligors' Agent and the Facility Agent in writing within 30 days
               of such notification to the Agent, those amendments shall take
               effect in accordance with the terms of that agreement; and

          (d)  if such amendments are not so agreed within 30 days, within 15
               days after the end of that 30 day period, the Obligors' Agent
               shall either:

               (i)  deliver to the Facility Agent, in reasonable detail and in a
                    form satisfactory to the Facility Agent, details of all such
                    adjustments as need to be made to the relevant financial
                    statements in order to bring them into line with Approved
                    Accounting Principles; or

               (ii) ensure that the relevant financial statements are prepared
                    in accordance with Approved Accounting Principles.

19.7 Financial Covenants:
     The Parent undertakes that it will procure that:

     19.7.1 Net Interest Cover: The ratio of EBITDA to Net Interest shall not,
          in respect of the relevant testing period specified in sub-clause
          19.8.1 ending on each of the dates specified in Column A below, be
          less than the ratio specified opposite that date in Column B below:

          Column A             Column B
          30 September 1999    4.50:1
          31 December 1999     4.50:1
          31 March 2000        4.75:1
          30 June 2000         5.00:1
          30 September 2000    5.25:1
          31 December 2000     5.50:1

                                      -71-
<PAGE>

          31 March 2001        5.75:1
          30 June 2001         6.00:1
          30 September 2001    6.25:1
          31 December 2001     6.50:1
          31 March 2002        6.50:1
          30 June 2002         6.50:1
          30 September 2002    6.50:1
          31 December 2002     6.50:1

   19.7.2 Fixed Charge Cover: The ratio of Cashflow to Total Debt Service
          shall not, in respect of the relevant testing period specified in
          sub-clause 19.8.1 ending on each of the dates specified in Column A
          below, be less than the ratio specified opposite that date in Column B
          below:

          Column A             Column B
          30 September 1999    1.05:1
          31 December 1999     1.05:1
          31 March 2000        1.05:1
          30 June 2000         1.05:1
          30 September 2000    1.05:1
          31 December 2000     1.05:1
          31 March 2001        1.05:1
          30 June 2001         1.05:1
          30 September 2001    1.05:1
          31 December 2001     1.05:1
          31 March 2002        1.05:1
          30 June 2002         1.05:1
          30 September 2002    1.05:1
          31 December 2002     1.05:1

   19.7.3 Leverage: The ratio of Total Debt on each date specified in Column A
          below to EBITDA in respect of the relevant testing period specified in
          sub- clause 19.8.1 (Calculation) ending on that date, shall not be
          greater than the ratio specified opposite that date in Column B below:

          Column A             Column B
          30 September 1999    2.00:1
          31 December 1999     2.00:1
          31 March 2000        1.88:1
          30 June 2000         1.75:1
          30 September 2000    1.50:1
          31 December 2000     1.50:1
          31 March 2001        1.45:1
          30 June 2001         1.40:1
          30 September 2001    1.35:1
          31 December 2001     1.25:1
          31 March 2002        1.25:1
          30 June 2002         1.25:1

                                      -72-
<PAGE>

             30 September 2002    1.25:1
             31 December 2002     1.25:1

19.8 Calculation:

     19.8.1  The covenants contained in Clause 19.7 (Financial Covenants) will
             be tested on a rolling aggregate basis for the immediately
             preceding 12 months ending on each of the dates specified in the
             relevant Column A.

     19.8.2  The covenants contained in Clause 19.7 (Financial Covenants) will
             be tested by reference to the accounts delivered to the Facility
             Agent under sub-clause 19.6.4(b) on the most recent Accounting
             Quarter, unless in any such case the audited accounts required to
             be delivered to the Facility Agent pursuant to Clause 19.6.4(a) for
             the relevant period or any part thereof are available on the
             relevant date on which any such covenant is tested, in which case
             such audited accounts shall be used instead.

     19.8.3  If the audited accounts are not available when the covenant is
             tested, but when such audited accounts become available the audited
             accounts demonstrate that the figures in any relevant quarterly
             accounts utilised for any such calculation cannot have been
             substantially accurate, then the Facility Agent shall require such
             adjustment to the calculations made or to be made as it, in good
             faith, considers appropriate to rectify such inaccuracy and
             compliance with the covenants in Clause 19.7 (Financial Covenants)
             will be determined by reference to such adjusted figures.

     19.8.4  The components of each definition used in Clause 19.7 (Financial
             Covenants) will be calculated in accordance with Approved
             Accounting Principles as varied by this Agreement.

19.9 Financial Definitions:
     In this Agreement, unless the context requires otherwise, the following
     expressions shall have the following meanings:

     "Cashflow" means, in respect of the relevant testing period, EBITDA for
     that period:

     (a)  plus the amount of any tax rebate or credit in respect of any Tax
          received in cash during that period;

     (b)  minus any Tax paid in cash during that period;

     (c)  minus all Capital Expenditure during that period;

     (d)  plus any extraordinary items received in cash during that period;

     (e)  minus any extraordinary items paid in cash during that period;

     (f)  minus the amount of the increase or plus the amount of the decrease
          (as the case may be) in Working Capital during that period;

                                      -73-
<PAGE>

     (g)  plus the amount of any dividends or other profit distributions (net of
          Tax) received in cash by any member of the Group during that period
          from companies which are not members of the Group;

     (h)  minus the lesser of:

          (i)  the amount of any dividends paid and payments made by the Parent
               in connection with any purchase by the Parent of stock issued by
               it, in each case in accordance with Clause 19.4 (Shares and Share
               Capital); and

          (ii) $15,000,000;

     (i)  minus the amount of any net income of any subsidiary of AOC taken into
          account in EBITDA for that period which whether by law or for any
          other reason cannot be distributed by way of dividend, loan or other
          means to AOC;

     (j)  after adding back or deducting, as the case may be, the amount of any
          gain or any loss against book value arising on a disposal of any asset
          (not being inventory disposed of in the ordinary course of trading)
          during such period to the extent deducted or added back in arriving at
          EBITDA for that period;

     (k)  after adding back or deducting, as the case may be, the amount of any
          non-cash cost or any non-cash gain during such period to the extent
          deducted or added back in arriving at EBITDA for that period;

     (l)  less (to the extent already included) the amount of any Net Proceeds
          arising on the disposal of any asset (not being inventory disposed of
          in the ordinary course of trading) which are applied in prepayment of
          the advances or provision of cash cover in accordance with Clause 14.4
          (Mandatory Prepayments on Asset Disposals) of the April 1998
          Agreement;

     (m)  minus the additional amount (if any) paid in respect of non-current
          liabilities in cash during that period to the extent not included in
          EBITDA for that period; and

     (n)  minus the additional amount (if any) paid to the Group's pension fund
          in cash during that period to the extent not included in EBITDA for
          that period;

     "EBIT" means, in respect of the relevant testing period, the consolidated
     net income of the Group for such period:

     (a)  before any deduction of corporation tax or other taxes on income or
          gains;

     (b)  before any deduction for Interest Payable;

     (c)  after deducting (to the extent included) Interest Receivable;

     (d)  excluding extraordinary items;

     (e)  after deducting (to the extent otherwise included) the amount of net
          income (or adding back the loss) of any member of the Group (other
          than the Parent) which

                                      -74-
<PAGE>

          is attributable to any third party (not being a member of the Group)
          which is a shareholder in such member of the Group;

     (f)  after deducting (to the extent otherwise included) any gain over book
          value arising in favour of a member of the Group on the disposal of
          any asset (not being any disposals made in the ordinary course of
          trading) during such period and any gain arising on any revaluation of
          any asset during such period; and

     (g)  after adding back (to the extent otherwise deducted) any loss against
          book value incurred by a member of the Group on the disposal of any
          asset (not being any disposals made in the ordinary course of trading)
          during such period;

     "EBITDA" means, in respect of the relevant testing period, EBIT for such
     period adding back depreciation and amortisation of:

     (a)  goodwill;

     (b)  Transaction Costs on the basis set out in the Agreed Financial
          Projections; and

     (c)  pre-paid hedge expenses incurred before the date of this Agreement in
          respect of the Senior Notes on the basis set out in the April 1998
          Agreed Financial Projections,

     in each case during that period deducted in arriving at EBIT;

     "Interest" means interest and amounts in the nature of interest paid or
     payable in respect of any Financial Indebtedness of any member of the Group
     excluding any interest paid or payable on Financial Indebtedness between
     any member of the Group and any other member of the Group but including,
     without limitation:

     (a)  the interest element of capital leases;

     (b)  discount and acceptance fees payable (or deducted) in respect of any
          Financial Indebtedness;

     (c)  fees payable in connection with the issue or maintenance of any bond,
          letter of credit, guarantee or other assurance against financial loss
          which constitutes Financial Indebtedness and is issued by a third
          party on behalf of a member of the Group;

     (d)  repayment and prepayment penalties or premiums payable or incurred in
          repaying or prepaying any Financial Indebtedness; and

     (e)  commitment, utilisation and non-utilisation fees payable or incurred
          in respect of Financial Indebtedness;

     "Interest Payable" means, in respect of the relevant testing period, the
     aggregate of:

     (a)  Interest accrued (whether or not paid or capitalised) during that
          testing period;

     (b)  the amount of the discount element of any Financial Indebtedness
          amortised during such period;

                                      -75-
<PAGE>

    in each case, as an obligation of any member of the Group during that
    period and calculated on the basis that:

    (i)  the amount of Interest accrued will be increased by an amount
         equal to any amount payable by members of the Group under hedging
         agreements in relation to that testing period; and

    (ii) the amount of Interest accrued will be reduced by an amount equal
         to any amount payable to members of the Group under hedging
         agreements in relation to that testing period.

    "Interest Receivable" means, in respect of the relevant testing period, the
    amount of interest (which for this purpose shall include all interest and
    amounts in the nature of interest, including (without limitation) amounts of
    the type described in paragraphs (a) to (e) (inclusive) of the definition of
    "Interest" above) accrued due (whether or not received) to members of the
    Group (other than by other members of the Group) during such period;

    "Net Interest" means, in respect of the relevant testing period, the amount
    of Interest Payable during that period less the amount of Interest
    Receivable;

    "Total Debt" means, at any time, the aggregate outstanding principal or
    capital amount of all Financial Indebtedness of the Group calculated on a
    consolidated basis excluding any Financial Indebtedness between any member
    of the Group and any other member of the Group provided that;

    (a)  in the case of capital leases referred to in the definition of
         Financial Indebtedness, only the capitalised value of any items
         falling thereunder as determined in accordance with Approved
         Accounting Principles shall be included;

    (b)  in the case of guarantees referred to in the definition of Financial
         Indebtedness, any items falling thereunder shall not be included to
         the extent relating to indebtedness of another member of the Group
         already included in this calculation;

    "Total Debt Service" means, in respect of the relevant testing period, the
    aggregate of:

    (a)  Net Interest for that period; and

    (b)  all scheduled repayments of principal under the terms of any Financial
         Indebtedness of any member of the Group (excluding any Financial
         Indebtedness between any member of the Group and any other member of
         the Group) falling due during that period:

         (i)  including, without limitation, all capital payments falling due
              in respect of any Financial Indebtedness falling within paragraph
              (g) of the definition of that term; and

                                      -76-
<PAGE>

         (ii) excluding any repayment or prepayment of any overdraft or
              revolving credit facility falling due during that period and
              capable of being simultaneously redrawn under the terms of the
              relevant facility; and

      "Working Capital" means trade and other debtors/receivables in respect of
      operating items plus prepayments and inventories less trade and other
      creditors/payables in respect of operating items and less accrued expenses
      and accrued costs.

19.10 FTC Notification Undertaking

      The Borrower undertakes to file, or to procure the filing of, any
      necessary notifications to the FTC (and/or the US Department of Justice)
      in connection with the proposed direct or indirect acquisition by members
      of the Group of the Target Shares (as defined in the Bridge Facility)
      within 30 days of the date of this Agreement.

19.11 Cancellation of Bridge Facility

      On or prior to the delivery date of a Utilisation Request in respect of
      the Tranche B Facility to the Facility Agent, the Borrower undertakes to
      provide irrevocable payment instructions instructing the Facility Agent to
      apply the proceeds of the Tranche B Advance in repayment of any amounts
      outstanding under the Bridge Facility Agreement.

20.   EVENTS OF DEFAULT

20.1  List of Events

      Each of the events set out in this Clause 30.1 constitutes an Event of
      Default, whether or not the occurrence of the event concerned is outside
      the control of the Parent or any other member of the Group.

      20.1.1 Payment Default: Any Obligor fails to pay on the due date any
             amount payable by it under any of the Finance Documents at the
             place and in the currency at or in which it is expressed to be
             payable, unless:

             (a)  in the case of any payment of principal, the Facility Agent is
                  satisfied that such non-payment is due solely to
                  administrative or technical errors or delays in the
                  transmission of funds and payment is made within two Business
                  Days of its due date; or

             (b)  in the case of any payment (other than any payment of
                  principal) either:

                  (i)  that payment is made within one Business Day of its due
                       date; or

                  (ii) the Facility Agent is satisfied that such non-payment is
                       due solely to administrative or technical errors or
                       delays in the transmission of the funds and payment is
                       made within two Business Days of its due date.

      20.1.2 Breach of Other Obligations

             (a)  Any Obligor fails to comply with any of its obligations under
                  any of Clauses 19.3.3 to 19.3.9 (inclusive), 19.4 (Shares and
                  Share Capital) or 19.7 (Financial Covenants);

                                      -77-
<PAGE>

             (b)  Any Obligor fails to observe or perform any of its obligations
                  or undertakings under any of the Finance Documents, other than
                  those specified in sub-clause 20.1.1 or sub-clause 20.1.2(a)
                  and, if such failure is capable of remedy, it is not remedied
                  within 20 Business Days of the earlier of:

                  (i)  the Facility Agent notifying the Obligors' Agent of such
                       default and requiring its remedy; or

                  (ii) such Obligor becoming aware of the relevant matter and
                       that it constitutes a default.

      20.1.3 Misrepresentation: Any representation, warranty or written
             statement which is made by any Obligor in any of the Finance
             Documents or is contained in any certificate, statement or notice
             provided under or pursuant to any of the Finance Documents proves
             to be incorrect in any respect (or, if not contained in any Finance
             Document, in any material respect) when made (or when deemed to be
             made or repeated), unless the circumstances giving rise to that
             default are capable of remedy and are remedied within 20 Business
             Days of the earlier of:

             (a)  the Facility Agent notifying Obligors' Agent of such default
                  and requiring its remedy; or

             (b)  such Obligor becoming aware of the relevant matter and that it
                  constitutes a default.

      20.1.4 Invalidity and Unlawfulness:

             (a)  Any provision of any Finance Document is or becomes invalid or
                  (other than by reason of the reservations) unenforceable for
                  any reason or shall be repudiated or the validity or
                  enforceability of any provision of any Finance Document shall
                  at any time be contested by any party thereto, in each case to
                  an extent or in a manner which could reasonably be expected to
                  be materially adverse to the interests of the Finance Parties
                  under the Finance Documents.

             (b)  Any Security Document fails or ceases to provide effective
                  security over the assets in respect of which security was
                  intended to be created by that Security Document in a manner
                  and to an extent which could reasonably be expected to be
                  materially adverse to the interests of the Finance Parties
                  under the Finance Documents.

             (c)  At any time it is or becomes unlawful under any applicable
                  jurisdiction for any Obligor to perform any of its obligations
                  under any of the Finance Documents in circumstances or to an
                  extent which could reasonably be expected to have a Material
                  Adverse Effect.

      20.1.5 Insolvency: Any Group Company stops or suspends or threatens or
             announces an intention to stop or suspend payment of its debts or
             shall for the purpose of section 123(1) of the Insolvency Act 1986
             (excluding section 123(1)(a) and on

                                      -78-
<PAGE>

          the basis that the words "proved to the satisfaction of the court" are
          deemed omitted from section 123(1)(e)) or any other applicable law be
          deemed to be unable or shall admit its inability to pay its debts as
          they fall due or shall become insolvent or a moratorium is declared in
          respect of any Group Company.

   20.1.6 Receivership and Administration:

          (a)  Any encumbrancer, receiver or similar officer takes possession
               of, or is appointed over or in respect of (or any petition is
               presented or meeting convened or application made for the purpose
               of any such appointment over or in respect of):

               (i)  all or substantially all of the business or assets of any
                    Group Company; or

               (ii) subject to Clause 20.2 (Excluded Events), any part (not
                    comprising all or substantially all) of the business or
                    assets of any Group Company.

          (b)  An administrator or similar officer is appointed over or in
               respect of any Group Company or any petition is presented or
               meeting convened or application made for the purpose of
               appointing an administrator or other similar officer of, or for
               the making of an administration order in respect of, any Group
               Company.

   20.1.7 Compositions and Arrangements:

          (a)  Any Group Company convenes a meeting of its creditors generally
               or proposes or makes any arrangement or composition with, or any
               assignment for the benefit of, its creditors generally.

          (b)  Any Group Company enters into any negotiations for or in
               connection with the re-scheduling, restructuring or readjustment
               of any Financial Indebtedness (other than under the Finance
               Documents) by reason of financial difficulties.

   20.1.8 Winding-up:

          (a)  Any meeting of a Group Company (other than a Dormant Company) is
               convened for the purpose of considering any resolution for (or to
               petition for) its winding up or any Group Company (other than a
               Dormant Company) passes such a resolution or a petition is
               presented for the winding-up of a Group Company (other than a
               petition which is contested on bona fide grounds and discharged
               at least seven days before its hearing date) or an order is made
               for the winding-up of any Group Company (other than a Dormant
               Company).

          (b)  Any meeting of the Partners or of the management committee of
               Octel Associates is convened for the purpose of considering any
               resolution for

                                      -79-
<PAGE>

               (or to petition or apply for) its dissolution of Octel Associates
               passes such a resolution or a petition or application is
               presented for the dissolution of Octel Associates or an order is
               made for the dissolution of Octel Associates.

   20.1.9 Suspension of Payments: Any order is made or resolution passed or
          other action taken for the suspension of payments, protection from
          creditors or bankruptcy of a Group Company.

  20.1.10 Similar Events Elsewhere: There occurs in relation to a Group
          Company or any of their assets in any country or territory in which it
          is incorporated or carries on business or to the jurisdiction of whose
          courts it or any of its property is subject to any event which
          corresponds in that country or territory with any of those mentioned
          in sub-clause 20.1.5 to 20.1.9 (inclusive) above.

  20.1.11 Attachment or Process: Subject to Clause 20.2 (Excluded Events), a
          creditor attaches or takes possession of, or a distress, execution,
          sequestration or other process is levied or enforced upon or sued out
          against any of the undertaking, assets, rights or revenues of a Group
          Company, except where:

          (a)  that Group Company is, in good faith, contesting the distress,
               execution, attachment, sequestration or other process by
               appropriate proceedings diligently pursued with a reasonable
               prospect of success; and

          (b)  if those proceedings were adversely determined against that Group
               Company, such distress, execution, attachment, diligence or other
               process could not reasonably be expected to have a Material
               Adverse Effect.

  20.1.12 Cessation of Business: An Obligor ceases, or threatens or proposes
          to cease, to carry on all or a substantial part of its business,
          except:

          (a)  in consequence of any reorganisation, reconstruction or
               amalgamation permitted under this Agreement; or

          (b)  as may result from any disposal of assets or wind-down of
               business activities not otherwise prohibited by the terms of this
               Agreement; or

          (c)  as previously approved in writing by the Majority Banks.

  20.1.13 Cross Default: Any Financial Indebtedness of a Group Company or
          Group Companies in excess of $2,500,000 (or its equivalent in other
          currencies) in aggregate:

          (a)  is not paid when due or within any applicable grace period in any
               agreement relating to that Financial Indebtedness; or

          (b)  becomes due and payable (or capable of being declared due and
               payable) before its normal maturity or is placed upon demand (or
               any commitment for any such indebtedness is cancelled or
               suspended) by reason of a default or event of default however
               described.

                                      -80-
<PAGE>

  20.1.14 Litigation: Any litigation, arbitration, or administrative or
          regulatory proceeding is commenced by or against a Group Company which
          could reasonably be expected to be adversely determined against the
          relevant Group Company and, if so determined, could reasonably be
          expected to have a Material Adverse Effect.

  20.1.15 Auditor's Qualification: The auditors of the Parent qualify their
          report on the audited consolidated accounts of the Parent in any
          manner which is, in the reasonable opinion of the Majority Banks,
          materially adverse in the context of the Finance Documents.

  20.1.16 Change of Control/Partners:

          (a)  Any Obligor is not or ceases to be a wholly-owned Subsidiary of
               the Parent.

          (b)  A Change of Control occurs.

          (c)  Either of the Partners ceases to be a partner of Octel Associates
               or any person (other than the Partners) becomes a partner of
               Octel Associates.

  20.1.17 Constitutional Documents: Any of the provisions of the
          constitutional documents of any Group Company are amended, modified or
          replaced in a manner or to an extent which could reasonably be
          expected to:

          (a)  affect the partnership structure of Octel Associates; or

          (b)  be materially adverse to the interests of the Finance Parties
               under the Finance Documents

               in each case except with the prior approval of the Majority
               Banks.


  20.1.18 Environmental:

          (a)  Any material liability is imposed on any of the Finance Parties
               as a consequence of the Finance Parties being party to the
               Finance Documents, which liability results from any change or
               change in the interpretation of any applicable Environmental Laws
               (in each case, after the date of this Agreement).

          (b)  Any change in applicable Environmental Laws results in the rights
               of any person against a Group Company ranking ahead of the rights
               of any Finance Party in a manner which is materially prejudicial
               to the interests of any Finance Party.

          (c)  Any discovery or finding that an Operating Property or any part
               thereof is or is likely to be, in such a condition in relation to
               the Environment as would impose an actual or contingent liability
               on a Group Company which is:

                                      -81-
<PAGE>

               (i)  not contemplated by the Environmental Report and which has
                    or is reasonably likely to have a Material Adverse Effect;
                    or

               (ii) which, if it is contemplated by the Environmental Report,
                    exceeds the amount so contemplated to an extent which has or
                    is reasonably likely to have a Material Adverse Effect.

     20.1.19 Material Adverse Change: At any time there occurs an event which,
             in the reasonable opinion of the Majority Banks, has, or is
             reasonably likely to have, a Material Adverse Effect (but ignoring
             for this purpose any anticipated decline in the Business
             contemplated in the Syndication Information Memorandum).

20.2 Excluded Events
     None of the events specified in sub-clauses 20.1.6(a)(ii) or 20.1.11 shall
     constitute an Event of Default unless the aggregate value of all the
     business, assets, undertakings, rights, revenues and properties in respect
     of which any of those events is outstanding at any time exceeds $2,500,000
     (or its equivalent in other currencies).

20.3 Cancellation and Repayment
     At any time after the occurrence of an Event of Default (and whilst the
     same is continuing) the Facility Agent may, and will if so directed by the
     Majority Banks, by written notice to the Obligors' Agent do all or any of
     the following in addition and without prejudice to any other rights or
     remedies which it or any other Finance Party may have under this Agreement
     or any of the other Finance Documents:

     20.3.1 terminate the availability of the Facilities, whereupon the
            Facilities shall cease to be available for drawing, the undrawn
            portion of the Commitments of each of the Banks shall be cancelled
            and no Bank shall be under any further obligation to make Advances
            under this Agreement; and/or

     20.3.2 declare all Advances, accrued interest thereon and any other sum
            then payable under this Agreement and any of the other Finance
            Documents to be immediately due and payable, whereupon such amounts
            shall become so due and payable; and/or

     20.3.3 declare all Advances to be payable on demand whereupon the same
            shall become payable on demand.

20.4 Consent and Waiver
     With effect from the date hereof, the Agents and the Banks consent to the
     entry into and performance by any member of the Group of the following
     transactions (i) the Acquisition, (ii) the Conditional Sale Agreement and
     (iii) the making by Octel Trading Limited of a subordinated loan in the
     principal amount of $10,000,000 in connection with the Acquisition and
     permanently waive any Event of Default or Potential Event of Default which
     may arise as a result of these transactions and which are contemplated by
     the Finance Parties at the date hereof.

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21.  THE AGENTS AND THE OTHER FINANCE PARTIES

21.1 Appointment and Duties of the Agents
     21.1.1 Each Finance Party (other than the Facility Agent) hereby appoints
            the Facility Agent to act as its agent under and in connection with
            the Finance Documents and irrevocably authorises the Facility Agent
            for and on its behalf to exercise such rights, powers and
            discretions as are specifically delegated to it by the terms of the
            Finance Documents, together with all such rights, powers and
            discretions as are incidental thereto and to give a good discharge
            for any moneys payable under the Finance Documents.

     21.1.2 The Facility Agent will act solely as agent for the Finance Parties
            in carrying out its functions as agent under the Finance Documents.

     21.1.3 The relationship between the Finance Parties and the Facility Agent
            is that of principal and agent only. The Facility Agent shall not
            have, nor be deemed to have, assumed any obligations to, or trust or
            fiduciary relationship with, the other Finance Parties or any
            Obligor, other than those for which specific provision is made by
            the Finance Documents.

21.2 Duties
     21.2.1 The Facility Agent shall:

            (a)  promptly send to each Bank details of each communication
                 received by it from an Obligor under any of the Finance
                 Documents, except in respect of details of any communication
                 relating to a particular Bank which shall be sent to that Bank
                 only;

            (b)  promptly send to each Bank a copy of any legal opinion
                 delivered under this Agreement or any of the other Finance
                 Documents and of any document or information received by it in
                 its capacity as Facility Agent pursuant to Clause 19.6
                 (Information and Accounting Undertakings);

            (c)  subject to those provisions of this Agreement which require the
                 consent of all the Banks to act in accordance with any
                 instructions from the Majority Banks or, if so instructed by
                 the Majority Banks, refrain from exercising a right, power or
                 discretion vested in it under any of the Finance Documents; and

            (d)  without prejudice to sub-clause 21.6.3, promptly notify each
                 Bank if it becomes aware of the occurrence of any Event of
                 Default or Potential Event of Default.

     21.2.2 The Facility Agent shall have only those duties, obligations and
            responsibilities expressly specified in the Finance Documents.

21.3 Rights
     The Facility Agent may:

     21.3.1 perform any of its duties, obligations and responsibilities under
            the Finance Documents by or through its personnel, delegates or
            agents (on the basis that

                                      -83-
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             the relevant Agent may extend the benefit of any indemnity received
             by it hereunder to its personnel, delegates or agents);

     21.3.2  (except as expressly provided to the contrary in the Finance
             Documents) refrain from exercising any right, power or discretion
             vested in it under the Finance Documents until it has received
             instructions from the Majority Banks or all the Banks, (as
             applicable pursuant to the Finance Documents);

     21.3.3  unless it has (in its capacity as the Facility Agent) received
             notice in writing to the contrary, treat (a) the Bank which makes
             available any portion of an Advance as the person entitled to
             repayment of that portion and (b) the office referred to under a
             Bank's name in Schedule 1 (or, in the case of a Transferee, at the
             end of the Substitution Certificate to which it is a party as
             Transferee) as its Lending Office;

     21.3.4  refrain from doing anything which would or might in its opinion be
             contrary to any law, regulation, directive or judgment of any court
             of any jurisdiction or otherwise render it liable to any person and
             may do anything which is in its opinion necessary to comply with
             any such law, regulation, judgment or directive;

     21.3.5  assume that no Event of Default or Potential Event of Default has
             occurred unless an officer of the relevant Agent while active on
             the account of the Parent acquires actual knowledge to the
             contrary;

     21.3.6  refrain from taking any step (or further step) to protect or
             enforce the rights of any Bank under this Agreement or any of the
             other Finance Documents until it has been indemnified and/or
             secured to its satisfaction against any and all costs, losses,
             expenses or liabilities (including legal fees) which it would or
             might sustain or incur as a result;

     21.3.7  rely on any communication or document believed by it to be genuine
             and correct and to have been communicated or signed by the person
             to whom it purports to be communicated and signed;

     21.3.8  rely as to any matter of fact which might reasonably be expected to
             be within the knowledge of an Obligor on a statement by or on
             behalf of an Obligor;

     21.3.9  obtain and pay for such legal or other expert advice or services as
             may reasonably seem necessary to it or desirable and rely on any
             such advice;

     21.3.10 accept without enquiry such title as an Obligor may have to any
             asset or assets intended to be the subject of the security created
             by the Security Documents; and

     21.3.11 hold or deposit any title deeds, Security Documents or any other
             documents in connection with any of the assets charged by the
             Security Documents with any banker or banking company or any
             company whose business includes undertaking the safe custody of
             deeds or documents or with any lawyer or firm of lawyers and it
             shall not be responsible for or be required to insure against any

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            loss incurred in connection with any such holding or deposit and it
            may pay all sums required to be paid on account or in respect of
            any such deposit.

21.4 Exoneration of Arranger and the Facility Agents
     Neither the Arranger nor the Facility Agent nor any of their respective
     personnel or agents:

     21.4.1 shall be responsible for the adequacy, accuracy or completeness
            of any representation, warranty, statement or information in the
            Syndication Information Memorandum, any of the Finance Documents or
            any notice or other document delivered under the Finance Documents;

     21.4.2 shall be responsible for the execution, delivery, validity,
            legality, adequacy, enforceability or admissibility in evidence
            of any of the Finance Documents;

     21.4.3 shall be obliged to enquire as to the occurrence or
            continuation of an Event of Default or a Potential Event of Default
            or as to the accuracy or completeness of any representation or
            warranty made by any Obligor hereunder;

     21.4.4 shall be responsible for any failure of any Obligor or any of
            the Banks duly and punctually to observe and perform their
            respective obligations under the Finance Documents;

     21.4.5 shall be responsible for the consequences of relying on the
            advice of any professional advisers selected by any of them in
            connection with the Finance Documents;

     21.4.6 shall be liable for acting (or refraining from acting) in what
            it believes to be in the best interests of the Creditors in
            circumstances where it has been unable, or it is not practicable,
            to obtain the instructions of the Banks or the Majority Banks (as
            the case may be);

     21.4.7 shall be liable for anything done or not done by it under or in
            connection with the Finance Documents save in the case of its own
            negligence or wilful misconduct.

21.5 The Arranger and the Facility Agent individually:
     21.5.1 If it is a Bank, each of the Arranger and the Facility Agent shall
            have the same rights and powers under the Finance Documents as any
            other Bank and may exercise those rights and powers as if it were
            not also acting as Arranger or Agent.

     21.5.2 Each of the Arranger and the Facility Agent may:

          (a)  retain for its own benefit and without liability to account any
               fee or other sum receivable by it for its own account;

          (b)  accept deposits from, lend money to, provide any advisory, trust
               or other services to or engage in any kind of banking or other
               business with any party to this Agreement, or any subsidiary of
               any party (and, in each case, may do so without liability to
               account).

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21.6 Communications and Information:

     21.6.1 All communications to an Obligor in connection with the Finance
            Documents are to be made by or through the Facility Agent. Each
            Finance Party will notify the Facility Agent of, and provide the
            Facility Agent with a copy of, any communication between such
            Finance Party, an Obligor or any other of the Finance Parties on any
            matter concerning the Facilities or the Finance Documents.

     21.6.2 The Facility Agent will not be obliged to transmit to the other
            Finance Parties any information in any way relating to any of the
            parties to the Finance Documents which that Facility Agent may have
            acquired otherwise than in connection with the Facilities or the
            Finance Documents. Notwithstanding anything to the contrary
            expressed or implied herein, the Facility Agent shall, as between
            itself and the other Finance Parties, not be bound to disclose to
            any other Finance Party or other person any information, disclosure
            of which might in the opinion of the Facility Agent result in a
            breach of any law or regulation or be otherwise actionable at the
            suit of any person.

     21.6.3 In acting as the Facility Agent for the Finance Parties, the
            Facility Agent's banking and agency divisions will be treated as
            separate entities from any other of its divisions (or similar units
            of the Facility Agent in any subsequent re-organisation) or
            subsidiaries (the "Other Divisions") and, in the event the Facility
            Agent should act for the Parent or any other Group Company in a
            corporate finance or other advisory capacity ("Advisory Capacity"),
            any information given by the Parent or any other Group Company to
            one of the Other Divisions is to be treated as confidential and will
            not be available to the Finance Parties without the consent of the
            Parent, provided that:

            (a)  the consent of the Parent will not be required in relation to
                 any information which the relevant Agent in its discretion
                 determines relates to an Event of Default or Potential Event of
                 Default or in respect of which the Banks have given a
                 confidentiality undertaking in a form satisfactory to the
                 Facility Agent and the relevant Group Company acting
                 reasonably; and

            (b)  if representatives or employees of the Facility Agent receive
                 information in relation to an Event of Default or Potential
                 Event of Default whilst acting in an Advisory Capacity, they
                 will not be obliged to disclose such information to
                 representatives or employees of the Facility Agent in their
                 capacity as agent bank or security agent hereunder or to any of
                 the Finance Parties if to do so would breach any rule or
                 regulation or fiduciary duty imposed upon such persons.

21.7 Non-Reliance on Facility Agent
     Each Finance Party confirms that it is (and will at all times continue to
     be) solely responsible for making its own independent investigation and
     appraisal of the business, operations, financial condition,
     creditworthiness, status and affairs of the Parent and each

                                      -86-
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     other Group Company and has not relied, and will not at any time rely on
     the Facility Agent:

     21.7.1 to provide it with any information relating to the business,
            operations, financial condition, creditworthiness, status and
            affairs of the Parent and any other Group Company, whether coming
            into its possession before or after the making of any Advance except
            as otherwise specifically provided herein; or

     21.7.2 to check or enquire into the adequacy, accuracy or completeness of
            any information provided by the Parent under or in connection with
            any of the Finance Documents (whether or not such information has
            been or is at any time circulated to it by the Agent), including,
            without limitation, that contained in the Syndication Information
            Memorandum; or

     21.7.3 to assess or keep under review the business, operations, financial
            condition, creditworthiness, status or affairs of the Parent or any
            other Group Company.

21.8 Indemnity to Agents:
     21.8.1 Each Bank shall on demand indemnify each Agent (in proportion to its
            participation in the outstanding Advances at the relevant time)
            against any cost, expense (including, without limitation, legal
            fees) or liability sustained or incurred by that Agent in complying
            with any instructions from the Banks or the Majority Banks (as the
            case may be) or otherwise sustained or incurred with the Finance
            Documents or its duties, obligations and responsibilities under the
            Finance Documents, except to the extent that they are sustained or
            incurred as a result of the gross negligence or wilful misconduct of
            that Agent or any of its respective personnel.

     21.8.2 The provisions of sub-clause 21.8.1 are without prejudice to any
            obligations of the Obligors to indemnify the Agents pursuant to the
            Finance Documents.

21.9 Termination and Resignation of Agency
     21.9.1 The Facility Agent may resign its appointment at any time by giving
            notice to the Banks and Obligors' Agent.

     21.9.2 A successor to the Facility Agent shall be selected:

            (a)  by the retiring Facility Agent nominating one of its Affiliates
                 (as defined below) following consultation with the Obligors'
                 Agent as successor to that Agent in its notice of resignation;
                 or

            (b)  if the retiring Facility Agent makes no such nomination, by the
                 Majority Banks nominating one of the Banks acting through an
                 office in the UK as successor to the Facility Agent (following
                 consultation with the Obligors' Agent); or

            (c)  if the Majority Banks have failed to nominate a successor to
                 the Facility Agent within 30 days of the date of the retiring
                 Facility Agent's notice of resignation, by the retiring
                 Facility Agent (following consultation with the

                                      -87-
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                 Obligors' Agent) nominating a financial institution of good
                 standing acting through an office in the UK to be that
                 successor Agent.

              For this purpose "Affiliate" in relation to a Facility Agent means
              one of its Subsidiaries or Holding Companies or another Subsidiary
              of any such Holding Company, in each case acting through an office
              in the UK.

      21.9.3  The resignation of the retiring Facility Agent and the appointment
              of the successor Facility Agent will become effective only upon
              that successor Agent accepting its appointment as the Facility
              Agent in writing, at which time:

              (a)  the successor Facility Agent will become bound by all the
                   obligations of the Facility Agent and become entitled to all
                   the rights, privileges, powers, authorities and discretions
                   of the Facility Agent hereunder;

              (b)  the agency of the retiring Facility Agent will terminate, but
                   without prejudice to any liabilities which the retiring
                   Facility Agent may have incurred prior to the termination of
                   its agency;

              (c)  the retiring Facility Agent will be discharged from any
                   further liability or obligation under or in connection with
                   the Finance Documents (save that the outgoing Facility Agent
                   shall pay to the successor a pro rata proportion of the
                   agency fee referred to in Clause 15.2) (Agency Fees)).

      21.9.4  The retiring Facility Agent will co-operate with the successor
              Facility Agent in order to ensure that its functions are
              transferred to the successor Facility Agent without disruption to
              the service provided to the Creditors and will promptly make
              available to the successor Facility Agent such documents and
              records as have been maintained in connection with this Agreement
              in order that the successor Facility Agent is able to discharge
              its functions.

      21.9.5  The provisions of this Agreement will continue in effect for the
              benefit of any retiring Facility Agent in respect of any actions
              taken or omitted to be taken by it or any event occurring before
              the termination of its agency.

21.10 Payments to Finance Parties

      21.10.1 The Facility Agent will account to the other Finance Parties for
              their respective due proportions of all sums received by the
              Facility Agent for such Finance Parties, whether by way of
              repayment of principal or payment of interest, commitment
              commission, fees or otherwise.

      21.10.2 The Facility Agent may retain for its own use and benefit, and
              will not be liable to account to the other Finance Parties for all
              or any part of any sums received by way of agency or arrangement
              fee or by way of reimbursement of expenses incurred by it.

21.11 Change of Office
      The Facility Agent may at any time and from time to time in its sole
      discretion by written notice to the Obligors' Agent and each of the other
      Finance Parties designate a different

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      office in the United Kingdom from which their respective duties as the
      Facility Agent will thereafter be performed.

22.   CERTIFICATES CONCLUSIVE AND APPLICATION OF MONEYS

22.1  Certificates Conclusive

      Save as expressly provided to the contrary in the Finance Documents, a
      certificate, determination, notification or opinion of any Finance Party
      or the Majority Banks stipulated for in any Finance Document or as to any
      rate of interest or any other amount payable under any Finance Document
      will be prima facie evidence of the rate or other amount payable.

22.2  Application of Moneys

      Following service of notice by the Facility Agent under Clause 20.3
      (Cancellation and Repayment), the Facility Agent or the Security Agent (as
      the case may be) shall apply all sums received under the Finance Documents
      against amounts outstanding under the Finance Documents in the order set
      out below, provided that, such sums are first applied under Clause 25.2 of
      the April 1998 Agreement until such time as all amounts outstanding under
      the April 1998 Agreement has been repaid in full:

      22.2.1  first to any unpaid fees and reimbursement of unpaid expenses of
              the Agents due under the Finance Documents;

      22.2.2  second to any unpaid fees and reimbursement of unpaid expenses of
              the Banks due under the Finance Documents;

      22.2.3  third to unpaid interest due under the Finance Documents;

      22.2.4  fourth to unpaid principal due under the Finance Documents
              (including without limitation provision of cash cover in respect
              of contingent liabilities and payment of amounts due under the
              Hedging Agreements and the Barclays Facility Letter as defined in
              the April 1998 Agreement); and

      22.2.5  fifth to other amounts due under the Finance Documents,

      in each case (other than sub-clause 22.2.1) pro rata to the outstanding
      amounts owing to the Finance Parties under the Finance Documents.

23.   PRO RATA PAYMENTS

23.1  Recoveries

      If any amount owing by any Obligor under any Finance Document to a Finance
      Party (the "Recovering Bank") is discharged by payment, set-off or any
      other manner other than through the Facility Agent in accordance with
      Clause 12 (Payments) or in accordance with Clause 22.2 (Application of
      Moneys) (such amount being referred to in this Clause 23.1 as a
      "Recovery") then:

      23.1.1  within 2 Business Days of receipt of the Recovery, the Recovering
              Bank shall (prior to service of any notice under Clause 20.3
              (Cancellation and Repayment)) pay to the Facility Agent an amount
              equal (or equivalent) to such Recovery or (at any time after
              service of any notice under Clause 20.3 (Cancellation and
              Repayment)) pay to the Security Agent an amount equal (or
              equivalent) to such Recovery;

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      23.1.2  the Facility Agent shall treat such payment as if it were part of
              the payment to be made by the relevant Obligor to the Banks
              rateably in accordance with their respective entitlements or, as
              the case may be, the Security Agent shall apply such payment in
              accordance with Clause 22.2 (Application of Moneys); and

      23.1.3  (save for any receipt by the Recovering Bank as a result of the
              operation of sub-clause 23.1.2), as between the relevant Obligor
              (as the case may be) and the Recovering Bank, the Recovery shall
              be treated and deemed as not having been paid.

23.2  Notification of Recovery

      Each Finance Party will notify the Facility Agent promptly of any such
      Recovery by that Finance Party other than by payment through the Facility
      Agent or the Security Agent. If any Recovery subsequently has to be wholly
      or partly refunded by the Recovering Bank which paid an amount equal
      thereto to the Facility Agent under sub-clause 26.1.1, each Finance Party
      to which any part of that amount was distributed will, on request from the
      Recovering Bank, repay to the Recovering Bank such Finance Party's pro
      rata share of the amount which has to be refunded by the Recovering Bank.

23.3  Information

      Each Finance Party will on request supply to the Facility Agent such
      information as the Facility Agent may from time to time request for the
      purpose of this Clause 23.

23.4  Exceptions to sharing of Recoveries

      Notwithstanding the foregoing provisions of this sub-clause 23.4, no
      Recovering Bank will be obliged to share any Recovery which it receives
      pursuant to legal proceedings taken by it to recover any sums owing to it
      under the Finance Documents which any other party which has a legal right
      to, but does not, either join in such proceedings or commence and
      diligently pursue separate proceedings to enforce its rights in the same
      or another court (unless the proceedings instituted by the Recovering Bank
      are instituted by it without prior notice having been given to such party
      through the Facility Agent).

23.5  Several Obligations

      Failure by any Recovering Bank to comply with any of the provisions of
      this Clause 23 will not release any other Recovering Bank from any of its
      obligations or liabilities under this Clause 23.

23.6  Obtaining Consents

      Each party to this Agreement agrees to take all steps required of it
      pursuant to Clause 23.1 (Recoveries) and to use its reasonable endeavours
      to obtain any consents or authorisations which may at any relevant time be
      required in respect of any payment to be made by it pursuant to this
      Clause 23.6.

23.7  No Security

      The provisions of this sub-clause 23.7 shall not, and shall not be
      construed so as to, constitute a charge by any Finance Party over all or
      any part of any sum received or recovered by it under any of the
      circumstances mentioned in this sub-clause 23.7.

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23.8  Hedging Banks

      This Clause 23 shall not, for the avoidance of doubt, apply to any Finance
      Party in its capacity as a Hedging Bank prior to service of notice under
      Clause 20.3 (Cancellation and Repayment).

24.   SET-OFF

24.1  Set-off Rights

      Any Finance Party may at any time following the occurrence of an Event of
      Default which is continuing unwaived (without notice to the relevant
      Obligor):

      24.1.1  set-off or otherwise apply sums standing to the credit of any
              Obligor's accounts with the Finance Party (irrespective of the
              terms applicable to such accounts and whether or not such sums are
              then due for repayment to that Obligor); and

      24.1.2  set-off any other obligations (whether or not then due for
              performance) owed by the Finance Party to the relevant Obligor,

      against any liability of the relevant Obligor to the relevant Finance
      Party under the Finance Documents which is due and unpaid.

24.2  Different Currencies

      A Finance Party may exercise such rights notwithstanding that the amounts
      concerned may be expressed in different currencies and each Finance Party
      is authorised to effect any necessary conversions at a market rate of
      exchange selected by it.

24.3  Unliquidated Claims

      If the relevant obligation or liability is unliquidated or unascertained,
      the Finance Party may set-off the amount it estimates (in good faith) will
      be the final amount of such obligation or liability once it becomes
      liquidated or ascertained.

25.   NOTICES

25.1  Mode of Service

      Save as specifically otherwise provided in this Agreement, any notice,
      demand or other communication to be served under the Finance Documents
      will be in writing and will be served only by posting by first class post
      or by personally delivering the same or sending the same by facsimile
      transmission to the party to be served at its address, facsimile number
      shown immediately after its name on the signature page of this Agreement
      or set out under its name in Schedule 1 (in the case of parties to this
      Agreement) or given in the relevant Finance Document (in the case of other
      parties) or at its registered office or at such other address or number as
      it may from time to time notify in writing to the other parties hereto.
      Any notice, demand or other communication to be served by an Obligor on
      the Agents or the Banks will be effective only if the same is expressly
      marked for the attention of the department or officer (if any) specified
      in Schedule 1 or in the relevant Finance Document (or such other
      department or officer as the relevant Agent or the relevant Bank may from
      time to time specify for this purpose).

25.2  Deemed Service:

      25.2.1  A notice or demand served on an Obligor by first class post in
              the United Kingdom will be deemed served 48 hours after posting
              or when delivered if

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              served personally. A notice or demand served on an Obligor
              overseas by air mail will be deemed duly served 72 hours after
              posting or when delivered if served personally. A notice or demand
              sent to an Obligor by facsimile transmission will be deemed served
              at the time of transmission unless served on a non- Business Day
              or after 5.00 p.m. London time in which case it will be deemed
              served at 9.00 a.m. on the following Business Day.

     25.2.2   A notice or demand served on a Finance Party by post or air-mail
              will be deemed served when delivered to that Finance Party. A
              notice or demand sent to a Finance Party by facsimile transmission
              will be deemed served when received by that Finance Party.

     25.2.3   Notwithstanding sub-clauses 25.2.1 and 25.2.2, a notice deemed
              served in accordance with sub-clauses 25.2.1 and 25.2.2 on a non-
              working day or after business hours in the place of receipt will
              only be deemed to be served at commencement of business hours in
              the place of receipt on the next working day in that place.

25.3 Proof of Service:

     In proving service of any notice, it will be sufficient to prove, in the
     case of a letter, that such letter was properly stamped or franked first
     class, addressed and placed in the post or, in the case of personal
     delivery, was left at the correct address and, in the case of a facsimile
     transmission, that such facsimile was duly transmitted to the facsimile
     number of the addressee referred to in Clause 25.1 (Mode of Service).

26.  NO IMPLIED WAIVERS

26.1 Failure to Exercise Rights

     No failure or delay by any Finance Party in exercising any right, power or
     privilege under any of the Finance Documents will operate as a waiver
     thereof nor will any single or partial exercise of any right, power or
     privilege preclude any other or further exercise thereof or the exercise of
     any other right, power or privilege.

26.2 Cumulative Rights

     The rights and remedies provided in the Finance Documents are cumulative
     and not exclusive of any rights and remedies provided by law and all such
     rights and remedies howsoever arising will, save where expressly provided
     to the contrary therein, be available to the Finance Parties severally and
     any Finance Party shall be entitled to commence proceedings in connection
     therewith in its own name.

26.3 Grant of Waivers:

     A waiver given or consent granted by any Finance Party under this Agreement
     will be effective only if given in writing and then only in the instance
     and for the purpose for which it is given.

27.  INVALIDITY OF ANY PROVISION

     If any provision of this Agreement is or becomes invalid, illegal or
     unenforceable in any respect under any law, the validity, legality and
     enforceability of the remaining provisions shall not be affected or
     impaired in any way.

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28.  CONFIDENTIALITY

     Subject to Clause 29.5 (Disclosure of Information), the parties will keep
     the Transaction Documents, the Syndication Information Memorandum, the
     Agreed Financial Projections and the subject matter of all such documents
     (including all details relating to the structure and financing of the
     Distribution) confidential, save to the extent that they are required by
     law or regulation to disclose the same. Each of the Finance Parties agrees
     with each Obligor to hold confidential all information which it acquires
     under or in connection with the Finance Documents, save to the extent it is
     required by law or regulation to disclose the same or the same comes into
     the public domain (otherwise than as a result of a breach of this Clause
     28). A Finance Party may, however, disclose such information to its
     auditors, legal advisers or other professional advisers (the "Advisers")
     for purposes connected with the Finance Documents provided that such
     Finance Party takes reasonable steps to procure that each Adviser maintains
     the confidentiality of such information.

29.  CHANGES TO PARTIES

29.1 Assignment by the Obligors

     No Obligor may assign or transfer all or any part of its rights, benefits
     or obligations under this Agreement or any of the other Finance Documents.

29.2 Assignments and Transfers by the Banks:

     29.2.1   A Bank, or any successor or assignee of such Bank, (in this
              capacity the "Transferor") may at any time assign, novate or
              otherwise transfer all or any part of its rights or obligations
              under the Finance Documents (or any of them) to any person (a
              "Transferee"), provided that, save where the Transferee is an
              Affiliated Bank of the Transferor:

              (a)  subject to sub-clause 29.2.1(b), that Bank has first
                   consulted with the Obligors' Agent; and

              (b)  in the case of an assignment, novation or transfer which
                   would result in the aggregate of the Transferee's Commitments
                   exceeding 66% per cent of the aggregate of the Total
                   Commitments, the Obligors' Agent has approved the identity of
                   that Transferee.

     29.2.2   A transfer of obligations will only be effective if made in
              accordance with Clause 29.3 (Substitution Provisions) or if the
              Transferee has, prior to the transfer taking effect, confirmed in
              writing to the Facility Agent (acting as agreed on behalf of all
              the other Finance Parties) and to the Obligors' Agent (acting as
              agent on behalf of all the other Obligors) that it undertakes to
              be bound by the terms of each of the Finance Documents as a Bank
              in form and substance satisfactory to the Facility and the
              Obligors' Agent, in the case of the Obligors' Agent not to be
              unreasonably withheld or delayed. On any such transfer being made,
              the Transferor will be relieved of its obligations to the extent
              that they are transferred to the Transferee.

     29.2.3   If any assignment, transfer or novation is effected in accordance
              with this Clause 29.2 and (as a result of laws or regulations in
              force or known to be

                                      -93-
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              coming into force at that time), on the occasion of any subsequent
              payment to the Transferee, any amount would, but for this sub-
              clause 29.2.3, be required to be paid by an Obligor under Clause
              13 (Taxes) or 14.1 (Increased Costs), then that Obligor shall not
              be liable to pay any such amount in excess of the amount it would
              have been obliged to pay if that assignment, transfer or novation
              had not been effected.

     29.2.4   The Obligors' Agent (for itself and as agent for the existing
              Obligors) will execute or procure that there are executed such
              documents and agreements as are necessary to effect a transfer of
              rights or obligations to a Transferee hereunder.

     29.2.5   Nothing in this Agreement will restrict the ability of a Bank to
              sub-contract any or all of its obligations under the Finance
              Documents (or any of them) if such Bank remains liable under this
              Agreement in relation to those obligations.

29.3 Substitution Provisions:

     29.3.1   A Transferor may (subject to sub-clause 29.2.1) transfer all or
              any of its rights and obligations under the Finance Documents to a
              Transferee by means of a novation effected by the Facility Agent
              executing a Substitution Certificate duly completed and signed on
              behalf of both the Transferee and the Transferor.

     29.3.2   On the later of (a) the date specified in the Substitution
              Certificate as being the date on or as from which the substitution
              under this Clause 29.3 is to take effect and (b) the date on which
              the Facility Agent executes the Substitution Certificate, the
              following shall occur:

              (a)  to the extent that in the Substitution Certificate the
                   Transferor seeks to transfer its rights and obligations under
                   the Finance Documents, each Obligor and the Transferor shall
                   each be released from further obligations to the other
                   parties under the Finance Documents (and the appropriate
                   reduction will be made to the Commitment of the Transferor)
                   and their respective rights against each other will be
                   cancelled (such rights and obligations being referred to in
                   this Clause 29.3 as "Discharged Rights and Obligations");

              (b)  each Obligor and the Transferee will each assume obligations
                   towards each other and acquire rights against each other
                   which differ from the Discharged Rights and Obligations only
                   insofar as each Obligor and such Transferee have assumed and
                   acquired the same in place of each Obligor and the
                   Transferor;

              (c)  each Obligor, the Transferee and the other Finance Parties
                   will, acquire the same rights and assume the same obligations
                   between themselves as they would have acquired and assumed
                   had the Transferee been an original party to this Agreement
                   as a "Bank" and each other Finance Document to which the
                   Transferor is a party as such, with the rights and
                   obligations acquired or assumed by it as a result of the
                   novation; and

                                      -94-
<PAGE>

              (d)  on the date on which such transfer takes effect, the
                   Transferee will pay to the Facility Agent for its own account
                   a transfer fee of (Pounds)1,000.

     29.3.3   Nothing in this Agreement or any other Finance Document will
              oblige a Transferor or cause a Transferor to be liable:

              (a)  to accept a re-assignment or re-transfer from a Transferee of
                   any of the rights or obligations assigned, transferred or
                   novated pursuant to this Clause 29; or

              (b)  to support any losses incurred by a Transferee by reason of
                   the non- performance by any Obligor of its obligations under
                   any of the Finance Documents.

     29.3.4   Each of the parties to this Agreement (other than the Transferor
              and the Transferee) hereby irrevocably authorises the Facility
              Agent to execute on its behalf any Substitution Certificate which
              has been duly completed in accordance with this Clause 29.3 and
              executed on behalf of each of the Transferor and the Transferee
              and to execute on its behalf the Syndication Agreement.

     29.3.5   The Facility Agent will promptly notify the other parties to this
              Agreement of the receipt and execution by it on their behalf of
              any Substitution Certificate.

29.4 Benefit of Agreement

     This Agreement will be binding upon, and enure for the benefit of; each
     party hereto and its or any subsequent successors or permitted assigns.

29.5 Disclosure of Information

     Each Bank may disclose to a proposed assignee or transferee or any sub-
     participant, risk participant or other participant proposing to enter or
     having entered into a contract with such Bank regarding the Finance
     Documents any information in the possession of such Bank relating to the
     Parent (or any member of the Group) which it reasonably considers should be
     disclosed, provided that such Bank first obtains a confidentiality
     undertaking in the form set out in Schedule 13 from the proposed assignee
     or transferee.

29.6 Reference Banks

     If a Reference Bank ceases to be one of the Banks then:

     29.6.1 the Bank shall cease to be a Reference Bank; and

     29.6.2 the Facility Agent shall in consultation with the Obligors' Agent
            appoint another Bank or an Affiliated Bank of another Bank to be a
            Reference Bank.

30.  BANKS' DECISIONS

30.1 Procedures

     Subject to Clauses 30.2 (Exceptions) and 30.3 (Express Provisions) and 30.5
     (Changes to April 1998 Agreement), any provision of this Agreement or any
     of the other Finance Documents (other than the Barclays Facility Letter)
     may be amended, waived, varied or modified (each a "Modification") with the
     agreement of the Majority Banks and the

                                      -95-
<PAGE>

     Obligors' Agent. A Modification so agreed may be effected by the Facility
     Agent executing such documents as may be required for such purpose on
     behalf of all the Banks and the Obligors' Agent executing such documents on
     behalf of the other Obligors. The Facility Agent will promptly notify the
     other parties to this Agreement and the other Finance Documents of the
     Modification so effected. Such Modification will take effect from the date
     upon which such notification is given (or such later date as the Facility
     Agent may specify therein) and will be binding on all parties to the
     Finance Documents.

30.2 Exceptions:

     30.2.1   The following matters will require the unanimous agreement of all
              of the Banks:

              (a)  any change in the amount of any Commitment of any Bank (other
                   than as a result of any transfer in accordance with Clause
                   29.2 (Assignments and Transfers by the Banks));

              (b)  any change in the definition of Margin;

              (c)  any change to the Tranche A Availability Period, the Tranche
                   B Availability Period or any Repayment Date or any other date
                   for payment of any sum due, owing or payable to any Bank;

              (d)  any change in the amount or currency of any sum due, owing or
                   payable to any Bank;

              (e)  any change in the amount of any payment of principal,
                   interest or commissions payable hereunder by any party;

              (f)  any amendment, variation or modification of Clause 22.2
                   (Application of Moneys), Clause 23 (Pro Rata Payments),
                   Clause 24 (Set-off), Clause 29.1 (Assignment by the
                   Obligors), this Clause 30 or to the definition of "Majority
                   Banks" in Clause 1.1 (Definitions); and

              (g)  any release of security (otherwise than as provided in Clause
                   17.4 (Release of Security) or in connection with any
                   enforcement action).

30.3 Express Provisions

     Any waiver or any consent, approval or other matter which by the express
     terms of this Agreement or any other Finance Document is to be given by all
     of the Banks will not be effective unless all of the Banks have agreed
     thereto but, subject thereto, may be given by the Facility Agent on behalf
     of all of the Banks.

30.4 Hedging Banks

     Subject to sub-clause 19.2.6, the Hedging Agreements may be amended,
     varied, waived or modified by agreement between the parties thereto.

30.5 Changes to April 1998 Agreement

     The Obligors shall not agree to any amendment of Clauses 22.3(d),(e),(g) or
     (j) or Clause 22.4(f) of the April 1998 Agreement without the consent of
     the Majority Banks.

                                      -96-
<PAGE>

31.  INDEMNITIES

31.1 General Indemnity and Breakage Costs

     The Borrower will fully indemnify each of the Finance Parties on demand
     from and against any expense (including legal fees), loss, damage or
     liability (other than loss of profit) which any of them may incur as a
     consequence of any sum not being paid when due pursuant to the Finance
     Documents, any failure to borrow (or otherwise utilise the Facilities) when
     obliged to do so in accordance with this Agreement, any Advance being
     repaid or prepaid otherwise than on the last day of an Interest Period, the
     occurrence of any Event of Default or otherwise in connection with a breach
     by a breach by any Obligor of any Finance Document. Without prejudice to
     its generality, the foregoing indemnity:

     31.1.1   extends to any interest, fees or other sums whatsoever paid or
              payable on account of any funds borrowed in order to carry any
              amount which an Obligor fails to pay in breach of any Finance
              Document and to any loss, premium, penalty or expenses which may
              be incurred in liquidating or employing deposits from third
              parties acquired to make, maintain or fund outstanding Advances or
              any other amount due or to become due under any Finance Document;
              and

     31.1.2   will entitle the relevant Finance Party to recover breakage costs
              from the Borrower in the event of an Advance or other sum being
              repaid or pre-paid prior to the last day of an Interest Period
              even though the relevant Finance Party has financed such Advance
              or other sum from its own resources, the costs it thereby incurs
              being calculated on the assumption it had borrowed an amount equal
              to the Advance or other sum in question in the London interbank
              market for the duration of the relevant Interest Period.

31.2 Currency Indemnity

     Without prejudice to Clause 31.1 (General Indemnity and Breakage Costs),
     if:

     31.2.1   any amount payable by any Obligor under or in connection with any
              Finance Document is received by any Finance Party (or by any Agent
              on behalf of any Finance Party) in a currency (the "Payment
              Currency") other than that agreed in the relevant Finance Document
              (the "Agreed Currency"), whether as a result of any judgement or
              order or the enforcement thereof, the liquidation of the relevant
              Obligor or otherwise and the amount produced by converting the
              Payment Currency so received into the Agreed Currency is less than
              the relevant amount of the Agreed Currency; or

     31.2.2   any amount payable by any Obligor under or in connection with any
              Finance Document has to be convened from the Agreed Currency into
              another currency for the purpose of (a) making or filing a claim
              or proof against any Obligor, (b) obtaining an order or judgment
              in any court or other tribunal or (c) enforcing any order or
              judgment given or made in relation to any Finance Document,

     then the Obligor will, as an independent obligation, indemnify the relevant
     Finance Party for the deficiency and any loss sustained as a result. Any
     conversion required will be made at such prevailing rate of exchange on
     such date and in such market as is

                                      -97-
<PAGE>

     determined by the relevant Finance Party as being most appropriate for the
     conversion. The Obligor will, in addition pay the costs of the conversion.

31.3 Waiver

     Each Obligor waives any right it may have in any jurisdiction to pay any
     amount under any Finance Document in a currency other than that in which it
     is expressed to be payable in the relevant Finance Document.

32.  MISCELLANEOUS

     The parties to this Agreement hereby confirm that the Subordination Deed
     shall continue in full force and effect and shall apply to the outstandings
     under the Finance Documents notwithstanding the terms hereof.

33.  GOVERNING LAW AND SUBMISSION TO JURISDICTION

33.1 Governing Law

     Any dispute, controversy, proceedings or claim of whatever nature arising
     out of or relating to, or breach of, this Agreement shall be governed by
     and this Agreement shall be construed in all respects in accordance with
     English law.

33.2 Submission to Jurisdiction

     For the benefit of each of the Finance Parties, each Obligor irrevocably
     submits to the jurisdiction of the courts in England for the purpose of
     hearing and determining any dispute arising out of this Agreement and for
     the purpose of enforcement of any judgement against its assets. Without
     prejudice to any other permitted mode of service, each Obligor agrees that
     service of any writ, notice or other document for the purpose of any
     proceedings in such courts shall be duly served upon it if delivered or
     sent by registered post to the Obligors' Agent.

33.3 Freedom of Choice

     The submission to the jurisdiction of the courts referred to in Clause 33.2
     (Submission to Jurisdiction) shall not (and shall not be construed so as
     to) limit the right of any Finance Party to take proceedings against any
     Obligor in any other court of competent jurisdiction nor shall the taking
     of proceedings in any one or more jurisdictions preclude the taking of
     proceedings in any other jurisdiction (whether concurrently or not) if and
     to the extent permitted by applicable law.

34.  COUNTERPARTS

     This Agreement may be executed in any number of counterparts and all of
     such counterparts taken together shall be deemed to constitute one and the
     same instrument.


IN WITNESS whereof the parties hereto have caused this Agreement to be duly
executed on the date first written above.

                                      -98-
<PAGE>

                                  SCHEDULE 1

                               The Original Banks

                                        Tranche A Facility   Tranche B Facility
                                            Commitment ($)       Commitment ($)

Barclays Bank PLC                               90,000,000           10,000,000
Lending Office   North West Large
and address for  Corporate Banking
notices:         PO Box 230
                 15-33 Moorfields
                 Liverpool  L69 2RU

Facsimile:       0151 801 3669
Attention:       Tim Rigg

                                       ----------------------------------------

                                                90,000,000           10,000,000


                                       ----------------------------------------

                                      -99-
<PAGE>

                                  SCHEDULE 2

                                    Part A
                          Borrowers and/or Guarantors

Group Company                                           Registered number/
                                                      State of Incorporation

Octel Corp.                                                    Delaware, USA
Octel International Limited                                          3316194
Octel Developments PLC                                               3516662
Octel Trading Limited                                                3516648
Octel Resources Limited                                              3316334
Octel Associates                                            (not applicable)
The Associated Octel Company Limited                                  344359
Associated Octel Company (Plant) Limited                              873396
AKC Trading Limited                                                  2627121

                                     -100-
<PAGE>

                                    Part B
                             The Security Documents

1.  Second Priority Collateral Assignment and Security Agreement executed by
    Octel Corp. in favour of the Security Agent and dated on or about the date
    of this Agreement.

2.  Debenture executed by Octel Associates, the Partners, AOC, AOC (Plant) and
    AKC Trading Limited in favour of the Security Agent and dated on or about
    the date of this Agreement.

3.  Debenture executed by Octel Developments and Octel International Limited in
    favour of the Security Agent and dated on or about the date of this
    Agreement.

                                     -101-
<PAGE>

                                  SCHEDULE 3
                        Documentary Conditions Precedent

1.  Formalities Certificate(s):

    1.1 a certificate from Octel Associates in the form set out in Part A of
    Schedule 7 signed by an authorised director or the secretary of each of the
    Partners which shall have attached to it the documents referred to in such
    certificate, including the requisite constitutional documents of Octel
    Associates referred to in paragraphs 3.1 to 3.6 (inclusive) below;

    1.2 a certificate from each Obligor (other than Octel Associates, Octel
    America and Octel LLC) in the form set out in Part B of Schedule 7 (in the
    case of the Parent) or Part C of Schedule 7 (in any other case) signed by an
    authorised director, the secretary or other officer acceptable to the
    Facility Agent of that Obligor which shall have attached to it the documents
    referred to in such certificate including the requisite constitutional
    documents of that Obligor and the appropriate board and (if applicable)
    shareholder resolutions approving the relevant Finance Documents to which
    that Obligor is a party.

2.  Finance Documents: each of the following documents in the agreed form duly
    executed and delivered by all parties thereto (except the Finance Parties):

2.1 this Agreement;

2.2 the Security Documents (together with such original notices of assignment or
    charge required to be given under the Security Documents); and

2.3 the Agency and Arrangement Fees Letter.

3.  Constitutional Documents: copies of the following documents:

3.1 the Partnership Agreement;

3.2 the Settlement Deed;

3.3 the Managing Agency Agreement;

3.4 the Leasing Agreement;

3.5 supplemental partnership agreements dated 29 December 1967, 19 December 1969
    and 21 December 1978 respectively, deeds of assumption dated 18 May 1989, 18
    November 1991, 16 March 1992, 13 March 1997, 31 October 1997 and 6 November
    1997 respectively and a retirement agreement dated 20 November 1997, in each
    case relating to the Partnership Deed;

3.6 all other documents executed to effect the transfer of partnership interests
    to the Partners as required under the Structure Document.

4.  Structure Document: a copy of the Structure Document (initialled by the
    Obligors' Agent and the Facility Agent for identification purposes only).

5.  Financial Information: certified copies of:

                                     -102-
<PAGE>

5.1 the Latest Accounts; and

5.2 the Latest Interim Accounts.

6.  Company Searches: a search of each UK member of the Group's register of
    mortgages and charges and company file at the Companies Registry or Register
    showing, inter alia, no Security Interests over any of its assets (other
    than any Permitted Security Interest) and no appointment of a receiver,
    liquidator or administrator or the presentation of any petition in respect
    of any of the same.

7.  Legal Opinions

7.1 a legal opinion of Clifford Chance as to matters of English law in form and
    substance satisfactory to the Facility Agent.

7.2 a legal opinion of Clifford Chance, New York as to matters of US law in form
    and substance satisfactory to the Facility Agent.

7.3 a legal opinion of Kirkland & Ellis as to matters of US law in form and
    substance satisfactory to the Facility Agent.

                                     -103-
<PAGE>

                                  SCHEDULE 4
                          Form of Utilisation Request


To:             [                      ] as Facility Agent

Attention:      .                                              , 19  .

From:    [Name of Company]

Dear Sirs,

Re: $100,000,000 term loan agreement dated . 1999 (the "Facility Agreement")

We request Utilisation of the [Tranche A/Tranche B] Facility as follows:

(a)    Amount:                               .

(b)    Date on which Advance is to be made:  .
(c)    Interest Period:                       .
(d)    Payment should be made to:             .
(e)    The Borrower is:                  .

We confirm that:

(i)    the representations and warranties made in Clause 18 of the Facility
       Agreement stipulated as being made or repeated on the date hereof are
       true and accurate as if made with respect to the facts and circumstances
       existing on such date;

(ii)   we are in full compliance with the undertakings contained in Clause 19 of
       the Facility Agreement; and

(iii)  no Event of Default or Potential Event of Default has occurred and is
       continuing or will occur as a result of the proposed Advance being made.

Terms defined in the Facility Agreement shall have the same meanings when used
in this request.


                          ...........................
                             [Authorised Signatory]
                              for and on behalf of
                               [Obligors' Agent]

                                     -104-
<PAGE>

                                  SCHEDULE 5

                              Mandatory Costs Rate

1.  The Mandatory Cost Rate is an addition to the interest rate to compensate
    Banks for the cost of compliance with the requirements of the Financial
    Services Authority (or any other authority which replaces all or any of its
    functions).

2.  On the first day of each Interest Period (or as soon as possible thereafter)
    the Agent shall calculate, as a percentage rate, a rate (the "additional
    costs rate") for each Bank, in accordance with the formula set out below.
    The Mandatory Cost Rate will be calculated by the Agent as a weighted
    average of such Bank's additional costs rates (weighted in proportion to the
    percentage participation of each Bank in the Advance) and will be expressed
    as a percentage rate per annum.

3.  The additional cost rate for each Bank will be calculated by the Agent as
    follows:

                                    Fx0.01
                                    ------ per cent per annum.
                                     300

    Where F is the rate of charge payable by that Bank to the Financial Services
    Authority pursuant to the Fees Regulations (but, for this purpose, ignoring
    any minimum fee required pursuant to the Fees Regulations) and expressed in
    pounds per (Pounds)1,000,000 of the Fee Base of that Bank.

4.  For the purposes of this Schedule:
    (a)  "Fees Regulations" means the Banking Supervision (Fees) Regulations
         1998 or such other law as may be in force from time to time in respect
         of the payment of fees for banking supervision;

    (b)  "Fee Base" has the meaning given to it, and will be calculated in
         accordance with, the Fees Regulations; and

    (c)  the resulting figure will be rounded to four decimal places.

5.  Each Bank shall supply any information required by the Agent for the purpose
    of calculating the above formula. In particular, but without limitation,
    each Bank shall supply the following information in writing on or prior to
    the date on which it becomes a Bank:

    (d)  its jurisdiction of incorporation and the jurisdiction of its Facility
         Office; and

    (e)  such other information that the Agent may reasonably require for such
         purpose.

    Each Bank shall promptly notify the Agent in writing of any change to the
    information provided by it pursuant to this clause.

                                     -105-
<PAGE>

6.  The rates of charge of each Bank for the purpose of F above shall be
    determined by the Agent based upon the information supplied to it pursuant
    to clause 5 and on the assumption that unless a Bank notifies the Agent to
    the contrary, each Bank's obligations in relation to the Fees Regulations
    are the same as those of a typical bank from its jurisdiction of
    incorporation with a Facility Office in the same jurisdiction as its
    Facility Office.

    The Agent shall have no liability to any person if such determination
    results in an additional costs rate which over or under compensates any Bank
    and shall be entitled to assume that the information provided by any Bank
    pursuant to clause 5 is true and correct in all respects.

7.  The Agent shall distribute the additional amounts received pursuant to the
    Mandatory Cost Rate to the Banks on basis of the additional cost rate
    incurred by each Bank, as calculated in accordance with the above formula
    and based on the information provided by each Bank pursuant to clause 5.

8.  Any determination by the Agent pursuant to this Schedule in relation to a
    formula, the Mandatory Cost Rate, an additional costs rate or any amount
    payable to a Bank shall, in the absence of manifest error, be conclusive and
    binding on all of the parties hereto.

The Agent may from time to time, after consultation with the Borrower and the
Banks, determine and notify to all parties any amendments or variations which
are required to be made to any of the formula set out above in order to comply
with any change in law or any requirements from time to time imposed by the
Financial Services Authority (or any other authority which replaces all or any
of its functions) and any such determination shall, in the absence of manifest
error, be conclusive and binding on all the parties hereto.

                                     -106-
<PAGE>

                                  SCHEDULE 6
                          Substitution Certificate/1/


            [(referred to in Clause 32.3 (Substitution Provisions)]

To:  [                         ]

          for and on behalf of the Obligors and the Banks

          (each as defined in the Facility Agreement referred to below).


This substitution certificate (this "Certificate") relates to a facility
agreement dated    1999 and made between, inter alia, [         ] (the "Facility
Agreement", which expression includes any amendments or supplements thereto or
restatements thereof).  Terms defined in the Facility Agreement shall, unless
otherwise defined in this Certificate, have the same meanings when used in this
Certificate.

1.  Transferor Confirmation and Request:  [Name of Transferor] (the
    "Transferor") by its execution of this Certificate:

1.1 requests [name of Transferee] (the "Transferee") to accept and procure, in
    accordance with Clause 29.3 of the Facility Agreement (Substitution
    Provisions), transfer to the Transferee of the portion of the Transferor's
    participation in the Facilities (and in the Advances made by it) as
    specified in Schedule 1 of this Certificate (the "Transfer Rights") by
    counter-signing this Certificate and delivering it to the Agent at its
    address for the giving of notices under the Facility Agreement so as to take
    effect on the date specified in Schedule 2 of this Certificate (the
    "Transfer Date"); and

1.2 confirms that the details which appear in Schedule 1 of this Certificate
    accurately record respectively, the amount of the Transferor's Commitment
    and the principal amount of the Transfer Rights at the date of this
    Certificate.

2.  Transferee Request:  The Transferee by its execution of this Certificate
    requests the Obligors' Agent, each other Obligor, the Banks and the Facility
    Agent to accept this Certificate as being delivered under and for the
    purposes of Clause 29 of the Facility Agreement so as to take effect in
    accordance with the terms of that clause on the Transfer Date.

3.  Transfer Fee:  The Transferee undertakes to pay to the Facility Agent for
    the Facility Agent's own account a transfer fee of (Pounds)1,000 as provided
    in Clause 29.3.2(d) of the Facility Agreement.

4.  Transferee Representations:  The Transferee hereby:

- --------------------------------------------------------------------------------
/1/ Each of the Transferor and Transferee should ensure that all regulatory
requirements are satisfied in connection with its entry into of any Substitution
Certificate.

                                     -107-
<PAGE>

4.1 confirms that it has received from the Transferor a copy of the Facility
    Agreement together with such other documents and information as it has
    requested in connection with this transaction;

4.2 confirms that it has not relied, and will not hereafter rely, on the
    Transferor or any other Finance Party to check or enquire on its behalf into
    the legality, validity, effectiveness, adequacy, accuracy or completeness of
    any such documents or information;

4.3 agrees that it has not relied, and will not hereafter rely, on the
    Transferor or any other Finance Party to assess or keep under review on its
    behalf the financial condition, creditworthiness, condition, affairs, status
    or nature of any Obligor or any other party to the Facility Agreement; and

4.4 represents and warrants to the Transferor and all other parties to the
    Facility Agreement that it has power to become a party to the Facility
    Agreement as a "Bank" on the terms herein and therein set out, has taken all
    necessary steps to authorise execution and delivery of this Certificate.

5.  Transferee Covenants: The Transferee hereby undertakes with the Transferor
    and all other parties to the Facility Agreement that it will perform in
    accordance with its terms all those obligations which, by the terms of the
    Facility Agreement, will be assumed by it following delivery of this
    Certificate to the Facility Agent.

6.  Exclusion of Transferor's Liabilities: Neither the Transferor nor any other
    Finance Party makes any representation or warranty nor assumes any
    responsibility with respect to the legality, validity, effectiveness,
    adequacy or enforceability of the Finance Documents and assumes no
    responsibility for the financial condition of the Parent or any other party
    to the Finance Documents or for the performance and observance by the
    Obligors' Agent or any Obligor of any of its obligations under the Finance
    Documents and any and all such conditions and warranties, whether express or
    implied by law or otherwise, are hereby excluded.

7.  Novation: On execution of this Certificate by the Facility Agent (on behalf
    of the Transferor and the Transferee) the Transferee will become a party to
    the Facility Agreement, on and with effect from the Transfer Date in
    substitution for the Transferor with respect to those rights and obligations
    which by the terms of the Facility Agreement and this Certificate are
    assumed by the Transferee.

8.  Law:  This Certificate and the rights and obligations of the parties hereto
    shall be governed by and construed in accordance with English Law.

AS WITNESS the hands of authorised signatories for and on behalf of the
Transferor, the Transferee and the Facility Agent on the respective dates
appearing below.

                                     -108-
<PAGE>

                   Schedule 1 to the Substitution Certificate


Transferor's Existing Tranche A Commitment:                              $

Transferor's Existing Tranche B Commitment:                              $

Portion of Transferor's Existing [Tranche A Commitment/participation
in Tranche A Advance] to be transferred:                                 $

Portion of Transferor's Existing Tranche B Commitment to be transferred: $

                                     -109-
<PAGE>

                   Schedule 2 to the Substitution Certificate

                     Particulars relating to the Transferee


Transfer Date:

Lending Office:

Contact Name:

Account for Payments:

Address for Notices:

Telephone:

Telex:

Facsimile:

                 Signature Clauses to Substitution Certificate


[Transferor]                                       [Transferee]
By:................                                By:..............
Date:                                              Date:


[Facility Agent]
By:................
Date:

                                     -110-
<PAGE>

                                   SCHEDULE 7

                                     Part A
                   Formalities Certificate (Octel Associates)

                                Octel Associates
                                (the "Obligor")

                         Facility Agreement dated . 1999
                           (the "Facility Agreement")


To:  Barclays Bank PLC as facility agent under the Facility Agreement.


We Octel Trading Limited and Octel Resources Limited being the partners of the
Obligor at the date of the Facility Agreement hereby make the following
certifications and confirmations.

1.  Constitutional Documents
    Attached hereto marked A are documents which, to the best of our knowledge
    and belief having made all due enquiries, are true, complete and up-to-date
    copies of:

1.1 Partnership Agreement;

1.2 the Settlement Deed;

1.3 the Managing Agency Agreement;

1.4 the Leasing Agreement;

1.5 supplemental partnership agreements dated 29 December 1967, 19 December 1969
    and 21 December 1978 respectively, deeds of assumption dated 18 May 1989, 18
    November 1991, 16 March 1992, 13 March 1997, 31 October 1997 and 6 November
    1997 respectively and a retirement agreement dated 20 November 1997, in each
    case relating to the Partnership Deed; and

1.6 [specify documents executed to effect the transfer or partnership interests
    to the Partners as required under the Structure Documents]

2.  Authorised Signatories

    The following signatures are the specimen signatures of the persons
    authorised by resolution of the Partners to execute all Finance Documents to
    which it is a party, utilisation requests under the Facility Agreement and
    all other documents and notices required in connection therewith:

Name                              Position  Signature
- ----                              --------  ---------

                                     -111-
<PAGE>



3.  No Breach of Borrowings Limit

    We have examined the terms of all loan agreements, trust deeds and similar
    borrowing instruments together with the constitutional documents of the
    Obligor and all other relevant instruments and agreements to which either of
    us is a party ("Relevant Documents") and we can confirm to you that the
    drawing by the Obligor of all sums capable of being drawn under the Facility
    Agreement (the "Maximum Drawings") does not infringe the terms of the
    Relevant Documents and that the borrowing of the Maximum Drawings when
    aggregated with any other Financial Indebtedness of both of us:

3.1 will be within our partnership powers; and

3.2 does not or will not cause to be exceeded any limit or restriction on any of
    the powers of either of us (whether contained in any Relevant Documents or
    otherwise) or the right or ability of the management committee of the
    Obligor to exercise such powers.

4.  No Events of Default

    We confirm to you that, as at the date of this Certificate, no Event of
    Default or Potential Event of Default exists and the Obligor and all other
    Obligors (as defined in the Facility Agreement) are in full compliance with
    their obligations under the Finance Documents.

Terms defined in the Facility Agreement shall bear the same meaning when used
herein.


Signed:                       -----------------------
                              For and on behalf of
                              Octel Trading Limited
Date:
                              -----------------------

Signed:
                              -----------------------
                              For and on behalf of
                              Octel Resources Limited
Date:
                              -----------------------

                                     -112-
<PAGE>

                                     Part B
                     Formalities Certificate (US Obligors)

                          [insert name of Corporation]
                                (the "Obligor")

                         Facility Agreement dated . 1999
                           (the "Facility Agreement")


To: Barclays Bank PLC as facility agent under the Facility Agreement.


I . being a director or duly authorised signatory of the Obligor hereby make the
following certifications and confirmations.

1.  Constitutional Documents
    Attached hereto marked A are true, complete and up-to-date copies of:

1.1 [specify Obligor. constitutional documents].
2.  Extract Board Resolutions

    Attached hereto marked B is a true and complete extract from the minutes of
    a meeting of the board of directors of the Obligor duly convened and held
    (during which a quorum was present throughout) recording resolutions passed
    at such meeting (which resolutions are in full force and effect and have not
    been rescinded or varied) and which approve the Finance Documents to which
    it is a party and all transactions contemplated thereby.

3.  Authorised Signatories

    The following signatures are the specimen signatures of the persons
    authorised by resolution of the board of directors of the Obligor to execute
    all Finance Documents to which it is a party and all other documents and
    notices required in connection therewith:

    Name                         Position                       Signature
    ----                         --------                       ---------


4.  No Breach of Borrowings Limit

    I have examined the terms of all loan agreements, trust deeds and similar
    borrowing instruments together with the constitutional documents of the
    Obligor and all other relevant instruments and agreements to which the
    Obligor is a party ("Relevant Documents") and I can confirm to you that the
    guarantee by the Obligor of all sums capable of being drawn under the
    Facility Agreement (the "Maximum Drawings") does not infringe the terms of
    the Relevant Documents and that the guarantee by the Obligor of the Maximum
    Drawings when aggregated with any other Financial Indebtedness of the
    Obligor:

                                     -113-
<PAGE>

4.1 will be within the corporate powers of the Obligor; and

4.2 does not or will not cause to be exceeded any limit or restriction on any of
    the powers of the Obligor (whether contained in any Relevant Documents or
    otherwise) or the right or ability of the directors of the Obligor to
    exercise such powers.

5.  No Events of Default

    I confirm to you that, as at the date of this Certificate, no Event of
    Default or Potential Event of Default exists and the Obligor and all other
    Obligors (as defined in the Facility Agreement) are in full compliance with
    their obligations under the Finance Documents.

Terms defined in the Facility Agreement shall bear the same meaning when used
herein.

Signed:
                              ---------------------------
Date:
                              ------------------

                                     -114-
<PAGE>

                                     Part C
                        Formalities Certificate (Others)

                            [Insert name of Company]
                                (the "Obligor")

                         Facility Agreement dated . 1999
                           (the "Facility Agreement")


To: Barclays Bank PLC as facility agent under the Facility Agreement.

I . being a director or authorised signatory of the Obligor being duly
authorised by the Obligor to deliver this Certificate hereby make the following
certifications and confirmations.

1.   Constitutional Documents

     Attached hereto marked A are true, complete and up-to-date copies of:

     (a)  the certificate of incorporation of the Obligor;

     (b)  all certificates of incorporation on change of name of the Obligor (if
          any); and

     (c)  the constitutional documents of the Obligor consisting of . .

2.   Extract Board Resolutions

     Attached hereto marked B is a true and complete extract from the minutes of
     a meeting of the board of directors of the Obligor duly convened and held
     (during which a quorum was present throughout) recording resolutions passed
     at such meeting (which resolutions are in full force and effect and have
     not been rescinded or varied) and which approve the Finance Documents to
     which it is a party and all transactions contemplated thereby.

3.   Shareholder Resolutions

     Attached hereto marked C is a true and complete copy of a resolution of all
     the shareholders of the Obligor unanimously passed authorising and
     directing the execution and performance by the Obligor of the Finance
     Documents to which it is a party.

4.   Authorised Signatories

     The following signatures are the specimen signatures of the persons
     authorised by resolution of the board of directors of the Obligor to
     execute all Finance Documents to which it is a party, utilisation requests
     under the Facility Agreement and all other documents and notices required
     in connection therewith:

     Name                          Position                         Signature
     ----                          --------                         ---------

                                     -115-
<PAGE>

5.  No Breach of Borrowings Limit

    I have examined the terms of all loan agreements, trust deeds and similar
    borrowing instruments together with our memorandum and articles of
    association or other constitutional document of the Obligor (as the case may
    be) and all other relevant instruments and agreements to which the Obligor
    is a party ("Relevant Documents") and I can confirm to you that the [drawing
    by/guarantee of] the Obligor of all sums capable of being drawn under the
    Facility Agreement (the "Maximum Drawings") does not infringe the terms of
    the Relevant Documents and that the [borrowing/guaranteeing] of the Maximum
    Drawings when aggregated with any other Financial Indebtedness of the
    Obligor:

    (a)  will be within the corporate powers of the Obligor; and
    (b)  does not or will not cause to be exceeded any limit or restriction on
         any of the powers of the Obligor (whether contained in any Relevant
         Documents or otherwise) or the right or ability of the directors of the
         Obligor to exercise such powers.

6.  No Events of Default

    I confirm to you that as at the date of this Certificate no Event of Default
    or Potential Event of Default exists and the Obligor and all other Obligors
    (as defined in the Facility Agreement) are in full compliance with their
    obligations under the Finance Documents.

Terms defined in the Facility Agreement shall bear the same meaning when used
herein.


Signed:
                              ---------------------------
Date:
                              ------------------


                                     -116-
<PAGE>

                                   SCHEDULE 8
                              Guarantee Provisions

1.  No Discharge: The obligations of each Guarantor under Clause 16.1
    (Guarantee) shall not be discharged, diminished or in any way affected as a
    result of:

1.1 any time or indulgence or waiver given to, or composition made with, any
    Obligor or any other person;

1.2 any amendment, variation or modification to, or replacement of, the Finance
    Documents or any increase in the amount of the Facilities (or any of them);

1.3 the taking, variation, compromise, renewal or release or refusal or neglect
    to perfect or enforce any right, remedies or securities against any Obligor
    or any other person;

1.4 any other guarantee, indemnity, charge or other security or right or remedy
    held by or available to the Finance Parties being or becoming wholly or in
    part void, voidable or unenforceable on any ground whatsoever or by any
    Finance Party from time to time dealing with, exchanging, varying,
    realising, releasing or failing to perfect or enforce any of the same;

1.5 any Obligor becoming insolvent, being dissolved, going into receivership or
    liquidation or having an administrator appointed;

1.6 any change in the identity of the partners of Octel Associates;

1.7 any change in the constitution of any Finance Party (or any Finance Party's
    successors or assigns) or the amalgamation or consolidation by a Finance
    Party with any other company or entity; or

1.8 any other act, omission, circumstance, matter or thing (other than an
    express release in writing) which, but for this provision, might operate to
    release or otherwise exonerate the Guarantor from its obligations under
    Clause 16.1 whether in whole or in part.

2.  Continuing Obligations: The Guarantee Obligations shall continue in full
    force and effect notwithstanding:

2.1 the fact that any purported obligation of any Obligor or any other person to
    any Finance Party (or any security therefor) becomes wholly or partly void,
    invalid or unenforceable for any reason whether or not known to the Finance
    Party or the Guarantor; or

2.2 any incapacity or any change in the constitution of, or any amalgamation or
    reconstruction of, any Guarantor or any Obligor or any other matter
    whatsoever.

3.  New Accounts: If notwithstanding Clause 16.2.3 the Guarantee Obligations
    shall for whatever reason cease to be continuing obligations, each Finance
    Party may continue any account or open one or more new accounts with the
    Borrowers (or any of them) and the liability of each Guarantor shall not be
    reduced or affected in any way by any subsequent transactions or receipts or
    payments into or out of any such account or accounts.

                                     -117-
<PAGE>

4.  Liability for Indebtedness: If, not withstanding Clause 16.2.3, the
    Guarantee Obligations are determined for any reason, each Guarantor will
    remain liable in respect of all indebtedness referred to in Clause 16.1.1 as
    at the date of determination (whether demanded or not) and whether or not
    any other Obligor is then in default under the Finance Documents.

5.  Primary Obligations: The Guarantee Obligations shall constitute the primary
    obligations of each Guarantor and no Finance Party shall be obliged, before
    enforcing its rights against any Guarantor under Clause 16.1 to:

5.1 proceed against any Obligor or any other person;

5.2 proceed against or exhaust any security held from any Obligor or any other
    person;

5.3 proceed against or have resort to any balance of any deposit account or
    credit on the books of any Finance Party in favour of any Obligor or any
    other person; or

5.4 pursue any other remedy in the power of any Finance Party whatsoever.

6.  No Subrogation: Subject to paragraph 1.7, until all the indebtedness under
    the Finance Documents has been irrevocably paid and discharged in full and
    the Finance Parties have no further commitment to provide facilities or
    accommodation to any Borrower, no Guarantor shall:

6.1 be subrogated to or otherwise entitled to share in, any security or monies
    held, received or receivable by any Finance Party or be entitled to any
    right of contribution in respect of any payment made by any Guarantor
    hereunder;

6.2 exercise or enforce any of its rights of subrogation and indemnity or any
    other claim or right against any Borrower or any co-surety;

6.3 following a claim being made on any Guarantor under Clause 16.1, demand or
    accept repayment of any monies due from any other Obligor to such Guarantor
    or claim any set-off or counterclaim against any other Obligor;

6.4 claim or prove in a liquidation or other insolvency proceeding of any
    Borrower or any co-surety in competition with any Finance Party without the
    consent of the Facility Agent; or

6.5 exercise any claim, right or remedy with respect to any collateral or
    security now or hereafter held by any Finance Party.

    Each Guarantor further agrees that, to the extent the agreement to withhold
    the exercise of its rights of subrogation, reimbursement, indemnification
    and contribution as set forth herein is found by a court of competent
    jurisdiction to be void or voidable for any reason, any rights of
    subrogation, reimbursement or indemnification which the Guarantor may have
    against any Obligor or against any collateral or security, and any rights of
    contribution such Guarantor may have against any such other Obligor, shall
    be junior and subordinate to any rights any Finance Party may have against
    any Obligor (including, without limitation, such Guarantor), to all right,
    title and interest which any Finance Party may have in any such collateral
    or security and to any right which any

                                     -118-
<PAGE>

    Finance Party may have against such other Obligor. Any Finance Party may
    use, sell or dispose of any item of collateral or security as it sees fit
    without regard to any subrogation rights any Guarantor may have and, upon
    any such disposition or sale, any rights of subrogation such Guarantor may
    have had shall terminate. If any amount shall be paid to any Guarantor on
    account of any such subrogation, reimbursement or indemnification rights at
    any time when all Guarantee Obligations shall not have been irrevocably paid
    in full, that amount shall be held in trust for the Finance Parties and
    shall forthwith be paid over to the Finance Parties to be credited and
    applied against the Guarantee Obligations, whether matured or unmatured, in
    accordance with the terms hereof.

7.  Exercise of Subrogation: Following the making of a demand on the Guarantor
    under Clause 16.1, the Guarantor will (at its own cost) promptly take such
    of the steps or action as are referred to in Clause 1.6 as the Facility
    Agent may from time to time stipulate.

8.  Turnover: The Guarantor shall promptly pay to the Facility Agent an amount
    equal to any set-off, proof or counterclaim in fact exercised by it against
    a Borrower or any co-surety and shall hold in trust for and promptly pay or
    transfer to the Facility Agent any payment or distribution or benefit of
    security in fact received by it whether arising as a result of a breach of
    paragraph 1.6 or compliance with directions given under paragraph 1.7.

9.  Suspense Account: The Facility Agent may place and keep (for such time as it
    shall think prudent) any money received, recovered or realised in respect of
    the Guarantee Obligations in or at a separate account (without liability to
    pay interest on the amounts standing to the credit of such account). The
    Facility Agent may retain such monies in the suspense account for such
    period as it considers expedient without having any obligation to apply the
    same or any part thereof in or towards discharge of the Guarantee
    Obligations.

                                     -119-
<PAGE>

                                  SCHEDULE 9
                              Accession Document

THIS ACCESSION AGREEMENT is made    19

BETWEEN:

(1) LIMITED (No.   ) (the "New [Borrower/Guarantor]");

(2) [                    ] (No.   ) (the "Obligors' Agent");


(3) [                    ] in its capacity as Facility Agent and Security
    Agent under the Facility Agreement.


WHEREAS:

(A) This Agreement is entered into in connection with a facility agreement (the
    "Facility Agreement") dated  1999 and made between [          ].

(B) This Agreement has been entered into to record the admission of the New
    [Borrower/Guarantor] as a [Borrower/Guarantor] under the Facility
    Agreement.

NOW IT IS HEREBY AGREED AS FOLLOWS:

1.  DEFINITIONS
    Terms defined in the Facility Agreement shall have the same meaning when
    used in this Agreement.

2.  ADMISSION OF NEW [BORROWER/GUARANTOR]

2.1 The New [Borrower/Guarantor] agrees to become a [Borrower/Guarantor] under
    the Facility Agreement and agrees to be bound by the terms of the Facility
    Agreement as if it had been named as a [Borrower/Guarantor] thereunder.

2.2 The New [Borrower/Guarantor] hereby confirms the appointment of the
    Obligors' Agent as its agent in the terms of the Facility Agreement.

2.3 The New [Borrower/Guarantor] confirms that its address details for notices
    in relation to Clause 25 (Notices) of the Facility Agreement are as follows:

Address:

Facsimile:

Telex:

Attention of:

                                     -120-
<PAGE>

2.4 By their signature below the parties to this Agreement (other than the New
    [Borrower/Guarantor]) confirm their acceptance of the New
    [Borrower/Guarantor] as a [Borrower/Guarantor] for the purpose of the
    Facility Agreement.

3.  LAW

    This Accession Agreement shall be governed by and construed in all respects
    in accordance with English law.

IN WITNESS whereof the parties have caused this Agreement to be duly executed on
the date first written above.


                                  SCHEDULE 1
                              Existing Borrowers


                                  SCHEDULE 2
                              Existing Guarantors

                                     -121-
<PAGE>

                       Signatories to Accession Document


New [Borrower/Guarantor]
 .

By: ..................


Obligors' Agent
 .

By: ..................

for itself and as agent
for and on behalf of
the Existing Borrowers
and the Existing Guarantors

The Facility Agent
[                      ]
By: ..................

for itself and as Facility Agent
and on behalf of the Security Agent
and the Banks

                                     -122-
<PAGE>

                                  SCHEDULE 10
                      Form of Confidentiality Undertaking

                          Confidentiality Undertaking

To:  Octel Corp. and Octel Associates (together the "Company");
     Great Lakes Chemical Corporation ("GLCC"); and
     [Transferor] (the "Transferor")

In connection with the possible purchase by the Receiving Party which has signed
this Undertaking from [                    ] (the "Transferor") or its designee
of an interest in the Transferor's participation in a facility agreement (the
"Facility Agreement") dated  . 1999 between [         ] (the "Transaction"), the
Transferor will be providing the Receiving Party which has signed this
undertaking with certain information with respect thereto that is non-public,
confidential or proprietary in nature, including, without limitation,
information relating to the Parent and its subsidiaries (the "Information").  In
consideration of the Information being made available to the Receiving Party,
the Receiving Party agrees and confirms as follows to the Company, GLCC and the
Transferor:

1.  It will keep all such Information disclosed to it confidential and will not
    disclose the whole or any part of it, without the prior written consent of
    the Company and the Transferor, to any person other than its directors,
    officers, employees and legal advisers (and other advisers to whom the
    Company and the Transferor have consented in writing) who in each case need
    to know the Information for the purposes of the Transaction and so long as
    such directors, officers, employees, legal and other advisers shall be
    informed by it of the confidential nature of the Information and the
    provisions of this Undertaking and it shall procure that they treat such
    Information confidentially and act as if bound hereby.

2.  It shall use and copy the Information only in connection with the
    Transaction and not for any other purpose.

3.  That it is aware, and that it will advise any directors, officers, and
    employees to whom any of the Information is disclosed, that it may be
    illegal for any person who has received from the Company or its advisers
    material, non-public information to deal in, or to encourage others to deal
    in, securities of the Company or another party to the Transaction or, except
    in the proper performance of his office or employment, to communicate such
    information to any other person.

4.  It will not, without the prior written consent of the Transferor, and will
    procure that its directors, officers, employees and legal and other advisers
    will not, disclose to any person either the approach to it in connection
    with, or its interest in, the Transaction or the fact that discussions or
    negotiations are taking or have taken place concerning its possible
    participation in the Transaction or any of the terms, conditions or other
    facts with respect thereto, including the status thereof, unless such
    Information is already within the public domain.

5.  In the event that the Receiving Party ceases to be involved in the
    Transaction, or at any time, at the request of the Company or the Transferor
    (whichever occurs first), without

                                     -123-
<PAGE>

    prejudice to its other obligations under this Undertaking, it shall return,
    and procure that its directors, officers, employees and legal and other
    advisers shall return, to the Transferor without delay all Information
    received, whether written or graphic, and will not retain any copies thereof
    in whatever form, including electronic, and the Receiving Party shall, and
    shall procure that its directors, officers, employees and legal and other
    advisers shall, destroy all documents, memoranda, notes and other writing in
    whatever form, including electronic, prepared by it or them based on the
    Information and to the extent reasonably practicable (and to the extent not
    so practicable subject to such Information remaining subject to all the
    obligations under this Undertaking) expunge all Information from any
    computer, word processor or any other device in its possession.

6.  This Undertaking shall not prohibit the Receiving Party from making any
    disclosure of the Information in relation to which it has received an
    unqualified opinion of a lawyer who shall not be one of its employees and
    who shall be satisfactory to the Company and the Transferor confirming that
    it is necessary in order to comply with a legal obligation to disclose, a
    lawful subpoena or other legal process binding on the Receiving Party or a
    binding request or direction of, any government department or government
    regulatory agency, provided in each case that written notice of any such
    disclosure and a copy of such opinion is given to the Company and the
    Transferor as soon as practicable and the Receiving Party shall consult and
    co-operate with the Company and the Transferor on the advisability of taking
    legally available steps to resist or narrow such disclosure and, if
    disclosure is required, co-operate with the Company and the Transferor in
    any attempt that the Company or the Transferor may make to resist or narrow
    such obligation to disclose and/or to obtain an order or other reliable
    assurance that confidential treatment will be accorded to the Information.

7.  The Receiving Party agrees that any disclosure of Information to it shall
    not be deemed to confer upon it any rights whatsoever and such Information
    shall remain the property of the Company and the Transferor.

8.  Paragraph 1 shall not apply to any of the Information which:

    8.1.1  at the time of being obtained by the Receiving Party is already
           within the public domain; or

    8.1.2  subsequently comes within the public domain other than by breach by
           the Receiving Party or any of its directors, officers, employees or
           legal or other advisers of this Undertaking; or

    8.1.3  has been or is acquired by the Receiving Party from a third party who
           is rightfully in possession of it and free to disclose it.

8.2 In disclosing the Information, none of the Transferor, the Company or GLCC
    or any affiliate, director, employee, agent or representative of the
    Transferor, the Company or GLCC make any representations or warranties,
    express or implied, concerning the completeness, suitability or accuracy of
    the Information, and none of the Transferor, the Company or GLCC or any
    affiliate, director, officer, employee, agent or representative of the
    Transferor, the Company or GLCC shall be under any obligation or liability
    to the Receiving Party or any of its directors, officers, employees or legal
    or other advisers with

                                     -124-
<PAGE>

    respect to the Information. If the Receiving Party or any of its directors,
    officers, employees or legal or other advisers elect to rely on any of the
    Information, they do so at their own risk.

8.3 In this Undertaking, the term "affiliate" means any subsidiary or holding
    company (or any other subsidiary of that holding company) of, or other body
    or partnership controlling, controlled by or under common control with the
    Company or, as the case may be, the Transferor and "holding company" and
    "subsidiary" have the meanings given to them under Section 736 of the
    Companies Act 1985 (as amended).

9.  The Company, GLCC and the Transferor shall be entitled to equitable relief,
    including injunction and specific performance, in the event of any breach or
    threatened breach of the provisions of this Undertaking and the Receiving
    Party shall not oppose the granting of such relief. Further, the Receiving
    party agrees to indemnify the Company, GLCC and the Transferor for any
    costs, claims, damages, losses or liabilities of whatsoever nature arising
    directly or indirectly from any breach of its obligations hereunder.

10. No failure or delay on the part of the Company, GLCC or the Transferor in
    exercising any right, power or privilege conferred by this Undertaking shall
    operate as a waiver of either that right, power or privilege, or of this
    Undertaking as a whole. No single or partial exercise of any right, power or
    privilege shall preclude any further exercise of that right, power or
    privilege.

11. If any obligation arising from this Undertaking shall be held unenforceable
    or illegal, in whole or in part for whatever reason, the enforceability of
    the rest of the obligations under this Undertaking shall be unaffected.

12. This Undertaking shall be governed by and construed in accordance with
    English law. The Receiving Party submits to the jurisdiction of the English
    courts.


Signed
For and on behalf of
(the "Receiving Party")
Dated:  [           ]

                                     -125-
<PAGE>

                                  SCHEDULE 11

                         Form of Syndication Agreement


THIS AGREEMENT is dated [           ], 1999 between:

(1)  [                         ] for itself and as agent for and on behalf of
     the other Obligors (the "Obligors' Agent");

(2)  BARCLAYS CAPITAL as arranger (the "Arranger");

(3)  BARCLAYS BANK PLC as existing bank (the "Existing Bank");

(4)  THE FINANCIAL INSTITUTIONS listed in Schedule 1 as the banks who wish to
     accede to the Credit Agreement as Banks (the "New Banks"); and

(5)  BARCLAYS BANK PLC as facility agent (in this capacity the "Facility Agent")
     and as security agent under the Original Credit Agreement (in this capacity
     the "Security Agent").

IT IS AGREED as follows:

1.  INTERPRETATION

1.1 Definitions

    In this Agreement, unless the contrary intention appears or the context
    otherwise requires:

    1.1.1  "Credit Agreement" means the Original Credit Agreement as amended
           pursuant to this Agreement;

    1.1.2  "Effective Date" means [                  ]; and

    1.1.3  "Original Credit Agreement" means the credit agreement dated . , 1999
           between, amongst others, the Obligors' Agent, the Arranger, the
           Facility Agent and the Security Agent.

1.2 Incorporation of Original Credit Agreement interpretations

    1.2.1  Terms defined in the Original Credit Agreement shall, unless the
           contrary intention appears or the context otherwise requires, have
           the same meaning in this Agreement.

    1.2.2  Clauses 1.2 (Construction), 1.3 (Other References), 27 (Invalidity of
           any Provision) and 33 (Counterparts) of the Original Credit Agreement
           shall apply to this Agreement as though they were set out in full in
           this Agreement, but as if references to the Original Credit Agreement
           were construed as references to this Agreement.

                                     -126-
<PAGE>

2.  CONSENT AND CONFIRMATION

    The Agent, the Arranger, the Existing Banks, the Facility Agent and the
    Security Agent each consent to:

    [(a)  [the amendments set out in Clause 3 (Amendments to the Original Credit
          Agreement) below and agree that the Original Credit Agreement shall be
          amended, with effect from the Effective Date; and

    (b)]  the New Banks becoming Banks,

    and confirm that, except as expressly provided by the terms of this
    Agreement, each of the Finance Documents shall continue in full force and
    effect.

3.  [AMENDMENTS TO THE ORIGINAL CREDIT AGREEMENT

The Obligors' Agent has requested the Banks to agree that the Original Credit
Agreement shall be amended as follows:

[                                  ] ]

4.  NOVATION

4.1 Novation of Commitments and Related Rights and Obligations

    On the Effective Date (regardless of whether a Default is then continuing):

    4.1.1  each New Bank will become a Bank under the Credit Agreement with a
           Tranche A Commitment and a Tranche B Commitment as set out opposite
           its name in Schedule 1;

    4.1.2  each Existing Bank's Tranche A Commitment and Tranche B Commitment
           shall be reduced down to the respective amounts set out opposite its
           name in Schedule 1; and

    4.1.3  each New Bank will automatically obtain and assume, and undertakes to
           perform, all of the rights and obligations of a Bank under and in
           respect of each of the Finance Documents in respect of the rights and
           obligations transferred to it under sub-clauses 4.1.1 and 4.1.2
           above, including, without limitation, its corresponding proportion of
           the rights and obligations of the Existing Banks in respect of: [list
           outstanding Advances].

4.2 Amounts Due on or Before the Effective Date

    4.2.1  All amounts (if any) payable to the Existing Banks by the Borrowers
           on or before the Effective Date (including, without limitation, all
           interest and fees payable on the Effective Date) in respect of any
           period ending prior to the Effective Date shall be for the account of
           the Existing Banks, and none of the New Banks shall have any interest
           in, or any rights in respect of, any such amounts.

    4.2.2  If any Advance falls to be made on the Effective Date:

                                     -127-
<PAGE>

           (a)  the Facility Agent will promptly notify each of the New Banks of
                that fact (and the amount of its participation in that Advance
                in accordance with sub-clause 4.2.2(b); and

           (b)  each Existing Bank and each New Bank shall participate in that
                Advance (subject to the terms of the Credit Agreement) as if the
                novation of the Commitments and rights and obligations under
                Clauses 4.1.1 and 4.1.2 (Novation of Commitments and Related
                Rights and Obligations) of this Agreement had taken effect prior
                to opening of business on the Business Day before the Effective
                Date,

          and the Obligors' Agent acknowledges that no Existing Bank will be
          obliged to participate in any such Advance to any greater extent.

4.3  Administrative Details

     Each New Bank has delivered to the Facility Agent its initial details for
     the purposes of Clause 25 (Notices) of the Credit Agreement.

5.   NATURE OF THIS AGREEMENT

     The novation of Commitments and rights and obligations contemplated by this
     Agreement shall take effect (in accordance with its terms) as a novation so
     that Clause 29.3 (Substitution Provisions) of the Credit Agreement shall
     apply to the Commitments, rights and obligations transferred, assumed and
     released under Clause 4.1 (Novation of Commitments and Related Rights and
     Obligations) of this Agreement and to the associated rights and obligations
     under the Finance Documents, as if this Agreement were a Substitution
     Certificate.

6.   GOVERNING LAW

     This Agreement is governed by English law.

This Agreement has been entered into on the date stated at the beginning of this
Agreement.

                                     -128-
<PAGE>

                                   SCHEDULE 1

                             Banks and Commitments


Banks                                                  Tranche A      Tranche B
                                                       Commitment     Commitment
                                                       ($)            ($)






                                                       -----------    ----------
Total

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                      Signatories to Syndication Agreement

Obligors' Agent
THE ASSOCIATED OCTEL COMPANY LIMITED

By: ..........................

Arranger
BARCLAYS CAPITAL

By: ..........................

Existing Bank
BARCLAYS BANK PLC

By: ..........................

New Banks
[                                  ]
By: ..........................

Facility Agent and Security Agent
BARCLAYS BANK PLC

By: ..........................

                                     -130-
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                       Signatories to Facility Agreement

The Parent
OCTEL CORP.

By:            D J Kerrison

Notice Details
Address:

Facsimile:
Attention:

The Partners
OCTEL TRADING LIMITED

By:            D J Kerrison

Notice Details
Address:       PO Box 17
               Oil Sites Road
               Ellesmere Port
               South Wirral  L65 4HF
Facsimile:     0151 356 6298

Attention:     Company Secretary

OCTEL RESOURCES LIMITED

By:            D J Kerrison

Notice Details
As for Octel Trading Limited above.

The Borrowers/Guarantors
OCTEL ASSOCIATES      D J Kerrison

By:  D J Kerrison                    By:   D J Kerrison
     For and on behalf of                  For and on behalf of
     OCTEL TRADING LIMITED                 OCTEL RESOURCES LIMITED

Notice Details
As for Octel Trading Limited above.



OCTEL CORP.

                                     -131-
<PAGE>

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

OCTEL INTERNATIONAL LIMITED

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

OCTEL DEVELOPMENTS PLC

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

OCTEL TRADING LIMITED

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

OCTEL RESOURCES LIMITED

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

THE ASSOCIATED OCTEL COMPANY LIMITED

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

ASSOCIATED OCTEL COMPANY (PLANT) LIMITED

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

                                     -132-
<PAGE>

AKC TRADING LIMITED

By:  D J Kerrison
Notice Details
As for OCTEL Trading Limited above.

The Arranger
BARCLAYS CAPITAL

By:            John Loomes

Notice Details
Address:       5 The North Colonnade
               Canary Wharf
               London E14 4BB
Facsimile:     0171 773 4894
Attention:     Karl Nolson

The Original Banks
BARCLAYS BANK PLC

By:            John Loomes

Notice Details
Address:       North West Large Corporate Banking
               PO Box 230
               15-33 Moorfields
               Liverpool  L69 2RU
Facsimile:     0151 801 3669
Attention:     Tim Rigg

The Facility Agent
BARCLAYS BANK PLC

By:            John Loomes

Notice Details
Address:       5 The North Colonnade
               Canary Wharf
               London E14 4BB
Facsimile:     0171 773 4893
Attention:    Frank Rogers

                                     -133-
<PAGE>

The Security Agent
BARCLAYS BANK PLC

By:            John Loomes

Notice Details
Address:       5 The North Colonnade
               Canary Wharf
               London E14 4BB
Facsimile:     0171 773 4893
Attention:     Frank Rogers

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