AETHER SYSTEMS LLC
8-K, 2000-04-14
COMPUTER INTEGRATED SYSTEMS DESIGN
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<PAGE>   1

                       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) April 6, 2000  Commission File
                                Number 000-27707

                              AETHER SYSTEMS, INC.
                           (Exact name of registrant)

         Delaware                                  52-2186634
   (State of organization)            (I.R.S. Employer Identification Number)

               11460 Cronridge Drive, Owings Mills, Maryland 21117
              (Address of principal executive offices and zip code)

                                 (410) 654-6400
                         (Registrant's telephone Number)


<PAGE>   2



ITEM 3.  ACQUISITION OF DISPOSITION OF ASSETS

            Aether Systems, Inc. acquired 100% of the capital stock of IFX Group
Limited, a provider of mobile financial date in Europe, for $85 million in cash
on April 6, 2000. Aether intends to contribute IFX to its planned European
wireless data venture with Reuters, which will be owned 60% by Aether and 40%
by Reuters. Aether used proceeds of its recently completed offerings of common
stock and convertible debt to fund the purchase price.

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

            (a) Financial Statements. The required financial statements will be
filed as soon as practicable, but not later than 60 days after the date by which
this report on Form 8-K must be filed.

            (b) Pro forma financial information. The required pro forma
financial information will be filed as soon as practicable, but not later than
60 days after the date by which this report on Form 8-K must be filed.

            (c)      The following exhibits are filed with this report:

                EXHIBIT NO.

                              1     Acquisition Agreement


<PAGE>   3



                                    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 hereunto duly authorized.

                                   SCHOOL SPECIALTY, INC.

                                   BY:    /s/ David S.Oros
                                      ---------------------------
                                          David S. Oros
                                          Chief Executive Officer

Dated:  April 6, 2000








<PAGE>   1

DATED                                                    2000
- --------------------------------------------------------------------------------







                         (1)    C.I. LAW TRUSTEES LIMITED

                         (2)    WARM WOOL AND PILE LIMITED

                                      -and-

                         (3)    AETHER SYSTEMS, INC.




                    ----------------------------------------
                            SHARE PURCHASE AGREEMENT
                                 - relating to -
                                IFX Group Limited
                    ----------------------------------------







                           Wilmer, Cutler & Pickering
                                4 Carlton Gardens
                                 London SW1Y 5AA
                               +44 (20) 7872 1000





<PAGE>   2



                                      INDEX


<TABLE>
<CAPTION>
CLAUSES                                                                                          PAGE NO.
- -------                                                                                          --------

<S>                                                                                              <C>
1.     INTERPRETATION................................................................................1

2.     SALE AND PURCHASE.............................................................................7

3.     COMPLETION....................................................................................8

4.     WARRANTIES...................................................................................12

5.     WARRANTY LIMITATIONS.........................................................................14

6.     INDEMNIFICATION..............................................................................14

7.     RETENTION....................................................................................15

8.     CONFIDENTIALITY..............................................................................18

9.     ANNOUNCEMENTS, ETC...........................................................................18

10.    COSTS........................................................................................18

11.    ASSIGNMENT...................................................................................19

12.    EFFECT OF COMPLETION.........................................................................19

13.    ENTIRE AGREEMENT.............................................................................19

14.    WAIVER, AMENDMENT............................................................................19

15.    FURTHER ASSURANCES...........................................................................20

16.    PAYMENTS.....................................................................................20

17.    TRUSTEE'S UNDERTAKING........................................................................20

18.    NOTICE.......................................................................................21

19.    COUNTERPARTS.................................................................................22

20.    GOVERNING LAW AND SUBMISSION TO JURISDICTION.................................................22

21.    INVALIDITY...................................................................................22

Schedule 1  Part 1: Particulars relating to the Company.............................................24

Schedule 1  Part 2:  Particulars relating to Subsidiaries IFX (UK) Limited..........................25

Schedule 2  Part 1:  Ownership of Shares of the Company.............................................33

                 Part 2 : Ownership of Shares of the Subsidiaries and Intext........................33

Schedule 3  Warranties..............................................................................35

Schedule 4  Tax Deed................................................................................64
</TABLE>


<PAGE>   3



<TABLE>
<S>                                                                                             <C>
Schedule 5  The Properties..........................................................................76

Schedule 6  Limitations of Liability................................................................79



Exhibit A....................................................................................Option Deed
</TABLE>

<PAGE>   4


THIS AGREEMENT is made the                                     day of April 2000

BETWEEN:-

(1)      C.I. LAW TRUSTEES LIMITED, a company registered in Jersey, whose
         registered office is at Westaway Chambers, 39 Don Street, St. Helier,
         Jersey ("CILT");

(2)      WARM WOOL AND PILE LIMITED, a company registered in Belize, whose
         registered office is at 60 Market Square, Belize City, Belize ("WWP");

(each a "Seller" and together the "Sellers");

and

(3)      AETHER SYSTEMS, INC. of 1460 Cronridge Drive, Owings Mills, MD 2117,
         U.S.A. (the "Purchaser").

WHEREAS:-

(A)      IFX Group Ltd is a private limited company incorporated in England
         under the Companies Acts under number 03224875 ("the Company"), having
         an authorised and issued share capital as specified in Part 1 of
         Schedule 1.

(B)      IFX Group Ltd has direct and an indirect subsidiaries, and a
         shareholding in Intext IFX Pte Limited, as detailed in Schedule 2.

(C)      The Sellers are the registered holders, and are able to procure the
         transfer, free from all liens, charges and encumbrances, of all of the
         issued and outstanding shares in IFX Group Ltd.

(D)      The Sellers wish to sell, and the Buyer wishes to purchase, all such
         shares.

(E)      Each of CILT and WWP have made warranties to the Purchaser in the terms
         of the warranties set out in this Agreement, subject only as provided
         in this Agreement and the Disclosure Letter, with the intent that the
         Purchaser should rely, and the Purchaser does rely, on such warranties
         in entering into this Agreement.

(F)      CILT is holding those of the Shares registered in its name on behalf of
         the Trust. CILT is the trustee of the Trust.

IT IS HEREBY AGREED as follows:-

1.       INTERPRETATION

         1.1.     The following provisions shall, unless the context otherwise
                  requires, have effect for the interpretation of this
                  Agreement.







                                      -1-
<PAGE>   5


1.2.     The following words and expressions shall have the following meanings:-

<TABLE>
<S>                                     <C>
         "Accounts Date"                30 June 1999;

         "Account Holders"              has the meaning set out in Clause 7.1;

         "Accounts"                     the audited consolidated financial statements (comprising
                                        a consolidated balance sheet, profit and loss account,
                                        cash flow statement, notes and directors' report and
                                        auditors' report) of the Company and the Group, and
                                        audited financial statements (including a balance sheet
                                        and profit and loss account) of each of the Subsidiaries
                                        (other than IFX France) and Intext, in each case as at and
                                        for the financial period ended on the Accounts Date and,
                                        in each case, copies of which are attached to the
                                        Disclosure Letter;

         "agreed form"                  means in the form agreed between the parties and
                                        initialled by or on behalf the parties hereto as being "in
                                        agreed form";

         "associated company"           has the meaning set out in sections 416 et seq. T.A.;

         "Company"                      the company described in Recital (A);

         "Completion"                   the completion of the sale and purchase of the Shares in
                                        accordance with Clause 2;

         "Completion Date"              the date upon which Completion takes place or, as the
                                        context may require, is scheduled to take place;

         "connected person"             a connected person as defined in Section 839 T.A.;

         "Deed of Covenant"             a deed in the agreed form to be executed by the parties
                                        thereto at Completion;

         "Disclosure Letter"            a letter of today's date together with the attachments
                                        thereto addressed by CILT to the Purchaser disclosing
                                        exceptions to the Warranties;

         "Encumbrance"                  any mortgage, charge (whether fixed or floating), pledge,
                                        lien, security interest or other
</TABLE>




                                      -2-
<PAGE>   6

<TABLE>
<S>                                     <C>
                                        third party right or interest (legal or equitable) over or in
                                        respect of the relevant asset, security or right;

         "FA" or "F.(No.2)A"            followed by a stated year mean the Finance Act or the
                                        Finance (No. 2) Act of that year;

         "GAAP"                         generally accepted accounting principles and practices;

         "Group                         the Company and the Subsidiaries;

         "Group Company"                the Company and/or any of the Subsidiaries;

         "holding company"              a holding company as defined in Section 736 of the
                                        Companies Act 1985;

         "Intellectual Property"        patents, trade marks, service marks, rights (registered or
                                        unregistered) in any designs; applications for any of the
                                        foregoing; trade or  business names; copyright and
                                        topography rights; know-how; secret formulae and
                                        processes; lists of suppliers and customers and other
                                        confidential and proprietary knowledge and information;
                                        rights protecting goodwill and reputation; database rights
                                        and rights under licences and consents in relation to such
                                        things and all rights or forms of protection of a similar
                                        nature to any of the foregoing or having equivalent effect
                                        anywhere in the world;

         "Intellectual Property         agreements or arrangements relating in any way whether
         Agreements"                    wholly or partly to Intellectual Property;

         "Intext"                       Intext IFX Pte. Limited, a corporation incorporated in
                                        Singapore with registration number 199702893E and having
                                        its registered office at 15 Phillip Street,  08-00 Tanean
                                        Kiam Building, Singapore (048694);

         "Intext Shares"                the shares of Intext, constituting 50% of the equity (and
                                        holding 50% of the voting rights) of Intext, as listed in
                                        Schedule 2;
</TABLE>



                                      -3-
<PAGE>   7

<TABLE>
<S>                                     <C>
         "ITA"                          the Inheritance Tax Act 1984 and any reference thereto
                                        shall include any enactment replaced or modified thereby
                                        as if Section 275 I.T.A. applied in like manner to this
                                        Agreement;

         "IT Contracts"                 any agreements or arrangements with third parties relating
                                        to IT Systems or IT Services, including all hire purchase
                                        contracts or leases of Hardware owned or used by the
                                        Company, licences of Software owned or used by the
                                        Company, and other IT procurement;

         "IT Services"                  any services relating to the IT Systems or to any other
                                        aspect of the Company's data processing or data transfer
                                        requirements, including facilities management, bureau
                                        services, hardware maintenance, software development or
                                        support, consultancy, source code deposit, recovery and
                                        network services;

         "IT Systems"                   Hardware and/or Software owned or used by the Company;

         "Hardware"                     any and all computer, telecommunications and network
                                        equipment;

         "Listed Intellectual           Intellectual Property referred to in the list annexed to
         Property"                      the Disclosure Letter;

         "Listed Intellectual           Intellectual Property Agreements set out in the list
         Property Agreements"           annexed to the Disclosure Letter;

         "Management Accounts"          the unaudited financial statements of the Company and the
                                        Group for the period from the Accounts Date to the
                                        Management Accounts Date in the form enclosed with the
                                        Disclosure Letter;

         "Management Accounts Date"     29 February 2000;

         "Payment Date"                 has the meaning set out in Clause 7.2;

         "Permitted Tax Liability"      in relation to the Trust, any taxation liability arising
                                        out of the sale of the Shares registered in the name of
                                        the Trustee pursuant to this
</TABLE>



                                      -4-
<PAGE>   8
<TABLE>
<S>                                     <C>
                                        Agreement;

         "Permitted Trust Liability"    in relation to the Trust, any taxation liability or any
                                        other liability arising from the administration of the
                                        Trust (other than any liability of the Trustee as Seller
                                        or otherwise pursuant to this Agreement (including, for
                                        the avoidance of doubt pursuant to the Warranties) or the
                                        Tax Deed) and properly payable from assets of the Trust,
                                        other than a Permitted Tax Liability, provided that the
                                        aggregate of all such liabilities shall not exceed
                                        US$250,000;

         "Property" or "Properties"     the property or properties full particulars of which are
                                        set out in Schedule 5 or any part or parts thereof;

         "Purchaser's Lawyers"          Wilmer, Cutler & Pickering of 4 Carlton Gardens, London
                                        SW1Y 5AA;

         "Retention"                    has the meaning set out in Clause 7.1;

         "Retention Account"            has the meaning set out in Clause 7.1;

         "Sellers' Lawyers"             CMS Cameron McKenna of Mitre House, 160 Aldersgate Street,
                                        London EC1A 4DD;

         "Service Agreement"            the service agreement to be entered into between Bo Peter
                                        Hoegh Kroll and the Company in the agreed form;

         "Shares"                       the issued and allotted shares of the Company specified in
                                        Schedule 1;

         "Software"                     any and all computer programs in both source and object
                                        code form, including all modules, routines and
                                        sub-routines thereof and all source and other preparatory
                                        materials relating thereto, including user requirements,
                                        functional specifications and programming specifications,
                                        ideas, principles, programming languages, algorithms, flow
                                        charts, logic, logic diagrams, orthographic
                                        representations, file structures, coding sheets, coding
                                        and including any manuals or other documentation
</TABLE>




                                      -5-
<PAGE>   9

<TABLE>
<S>                                     <C>
                                        relating thereto and computer generated works;

         "subsidiary"                   a subsidiary as defined in Section 736 of the Companies
                                        Act 1983;

         "Subsidiary"                   a subsidiary of the Company;

         "T.A."                         The Income and Corporation Taxes Act 1988;

         "Tax Warranties"               Those of the Warranties set out in Part J of Schedule 3;

         "Tax Deed"                     a deed to be executed by the parties thereto at Completion
                                        in the form set out in Schedule 4;

         "T.C.G.A."                     the Taxation of Chargeable Gains Act 1992;

         "Trust Assets"                 in relation to the Trust, the aggregate of the cash sums paid to
                                        the Trustee pursuant to Clause 3.5.4, together with such assets
                                        as may result from the investment of such sums less an amount
                                        equal to any Permitted Trust Liability incurred prior to the date
                                        of this Agreement not exceeding US$100,000;

         "Trust"                        The Sherborne Trust, a trust established under the laws of
                                        the Island of Jersey;

         "Trust"                        The Sherbourne Trust;

         "Trustee"                      CILT;

         "V.A.T.A"                      the Value Added Tax Act 1994;

         "Warranties"                   the warranties set out in Schedule 3;
</TABLE>

         1.3.     Words, expressions and abbreviations defined in the Tax Deed
                  shall have the same meanings in this Agreement.

         1.4.     References to the parties hereto include their respective
                  permitted assignees and/or the respective successors in title
                  to substantially the whole of their respective undertakings
                  and, in the case of individuals, to their respective estates
                  and personal representatives.



                                      -6-
<PAGE>   10

         1.5.     References to statutes or statutory provisions include
                  references to any orders or regulations made thereunder and
                  references to any statute, provision, order or regulation
                  include references to that statute, provision, order or
                  regulation as amended, modified, re-enacted or replaced from
                  time-to-time before the date hereof (subject as otherwise
                  expressly provided in this Agreement) but provided always that
                  this sub-clause will not operate to increase the liability of
                  any of the Sellers in respect of any such modification,
                  re-enactment or replacement made after the date of this
                  Agreement.

         1.6.     References to persons shall include bodies corporate and
                  unincorporated, associations, partnerships and individuals.

         1.7.     Words denoting the singular shall include the plural and vice
                  versa and words denoting any gender shall include all genders.

         1.8.     Headings to clauses, sub-clauses and paragraphs and
                  descriptive notes in brackets relating to provisions of
                  taxation statutes are for information only and shall not form
                  part of the operative provisions of this Agreement.

         1.9.     References to Recitals, Clauses or Schedules are to recitals
                  to, clauses of and schedules to this Agreement. References to
                  Sections are to sections of the Warranties.

         1.10.    The Recitals and Schedules form part of the operative
                  provisions of this Agreement and references to this Agreement
                  shall, unless the context otherwise requires, include
                  references to the Recitals and the Schedules, but shall not,
                  for the avoidance of doubt, include the Tax Deed.

2.       SALE AND PURCHASE

         2.1.     Sale and Purchase: Subject to the terms and conditions of this
                  Agreement, the Sellers shall sell with full title guarantee,
                  and the Purchaser shall purchase, all of the Shares with
                  effect from the commencement of business on the Completion
                  Date free from all Encumbrances and together with all accrued
                  benefits and rights attaching thereto.

         2.2.     Waiver of rights of Pre-emption: Each of the Sellers hereby
                  waives any rights of pre-emption or first refusal or other
                  rights he or she may have under the articles of association of
                  the Company or otherwise.

         2.3.     Consideration:


                  2.3.1.   The consideration for such sale and purchase shall be
                           the total sum of US$85,000,000 to be satisfied as
                           follows:-

                           a)       the sum of US$5,000,000 shall be paid into
                                    the Retention Account in the manner provided
                                    in Clause 7.1 and shall be dealt with in
                                    accordance with Clause 7; and



                                      -7-
<PAGE>   11

                           b)       the balance shall be paid in cash at
                                    Completion in the manner provided in Clause
                                    3.5.4.

                  2.3.2.   No later than 90 days from the date of this
                           Agreement, CILT shall receive an Option Deed,
                           substantially similar to the one attached hereto as
                           Exhibit A, for ordinary shares of a new entity to be
                           formed ("Newco") in an amount equal to 1.5% of
                           Newco's initial capitalization on a fully diluted
                           basis with an exercise price based on a valuation of
                           Newco of US$200 million; or if Newco has not been
                           formed, then ordinary shares of the Company in an
                           amount equal to 1.5% of the capitalization on a fully
                           diluted basis of the Company on the date of this
                           Agreement with an exercise price based on a valuation
                           of the Company of US$100 million. Upon the formation
                           of Newco, CILT shall immediately forfeit the Option
                           Deed with respect to ordinary shares of the Company
                           and shall promptly receive an Option Deed with
                           respect to ordinary shares of Newco as set forth in
                           this Clause 2.3.2. The grant date for purposes of the
                           Option Deed shall be the date hereof.

3.       COMPLETION

         3.1.     Location: Completion shall take place immediately following
                  the signing of this Agreement at the offices of the
                  Purchasers' Lawyers or at such other time or place as the
                  Sellers and the Purchaser may agree.

         3.2.     Sellers' Delivery: On Completion each of the Sellers shall
                  deliver to the Purchaser:-

                  3.2.1.   transfers in common form relating to those of the
                           Shares to be sold by him hereunder duly executed in
                           favour of the Purchaser or its nominee;

                  3.2.2.   share certificates relating to such Shares;

                  3.2.3.   any waivers or consents by shareholders of the
                           Company or the Subsidiaries or other person which the
                           Purchaser may reasonably require so as to enable the
                           Purchaser or its nominee to be registered as the
                           holders of the Shares;

                  3.2.4.   effective written resignations under seal of W.
                           Ahlefeldt-Laurvig as director of the Company, of
                           Nicholas St. Clair Morgan and Ian St. Clair Morgan as
                           directors of IFX Infoforex Limited, of C.I. Law
                           Services Limited as secretary of IFX Infoforex
                           Limited and of Mitre Secretaries Limited as secretary
                           of the Company and IFX (UK) Limited and from any
                           employment of or by the Company or the Subsidiaries
                           containing a confirmation that they have no claim
                           against the Company or any of the Subsidiaries for
                           compensation



                                      -8-
<PAGE>   12

                           for loss of office or termination of employment or
                           otherwise whether statutory or otherwise or for
                           unpaid remuneration;

                  3.2.5.   the common seals, certificates of incorporation,
                           statutory books, share certificate books, and all
                           copies of the memorandum and articles of association
                           of each Group Company incorporated in the United
                           Kingdom and copies of the equivalent documents (if
                           any) in respect of Group Companies incorporated
                           outside the United Kingdom;

                  3.2.6.   all books of account and other records, cheque books
                           and all insurance policies in any way relating to or
                           concerning the respective businesses of each Group
                           Company, provided that the Sellers may discharge this
                           obligation by delivering all such items into the
                           Purchaser's possession at the premises of each Group
                           Company;

                  3.2.7.   a counterpart of the Tax Deed duly executed by CILT;

                  3.2.8.   deliver to the Purchaser's Lawyers a counterpart of
                           the service agreement of Mr. Kroll with the Company
                           in the agreed form, duly executed by Mr Kroll;

                  3.2.9.   duly executed transfers of the 10 shares of 10,000
                           pesetas each held by W. Ahlefeldt-Laurvig in IFX
                           Finanzas Espania S.A. in favour of the Purchaser or
                           its nominee;

                  3.2.10.  share certificates relating to all of the issued
                           shares of each of the Subsidiaries incorporated in
                           the United Kingdom and Jersey;

                  3.2.11.  a release in the agreed form duly executed under seal
                           by Mr. Kroll, Mr. W. Ahlefeldt-Laurvig, Mr. F.
                           Ahlefeldt-Laurvig, Mr. Verlaine and the Sellers, in a
                           form satisfactory to the Purchaser, releasing the
                           Company and the Subsidiaries from any liability
                           whatsoever (actual or contingent) which may be owing
                           to any of them by the Company or any of the
                           Subsidiaries except for liabilities under specified
                           continuing service or employment, consultancy or
                           similar contracts between the Company and/or any
                           Group Company and such persons and indemnifying the
                           Purchaser's Group in respect of any claims which may
                           be brought against any of the Purchasers or any
                           member of the Purchaser's Group with respect to any
                           such liability subsisting at the Completion Date;

                  3.2.12.  the Deed of Covenant duly executed by Bo Peter Heogh
                           Kroll, William Ahlefeldt-Laurvig, Frederick
                           Ahlefeldt-Laurvig and Yvan Verlaine;



                                      -9-
<PAGE>   13

                  3.2.13.  the executed Amending Agreement and evidence of the
                           directorship of Elisabeth Mulijohardjo of Intext Pte
                           Limited as at the date of execution of the Amending
                           Agreement;

                  3.2.14.  evidence that all of the options held by Warm Wool
                           and Pile Limited over shares in the Company or any
                           Subsidiary have been exercised or cancelled; and

                  3.2.15.  releases in agreed form from each of Kirsten Kroll,
                           F. Ahlefeldt-Laurvig and Elisabeth Ahlefeldt-Laurvig
                           releasing the Company and each Subsidiary from any
                           and all liabilities which may be owing by the Company
                           or any Subsidiary to each of them or to any of their
                           respective connected persons or associated companies.

         3.3.     Board Resolutions of the Company and IFX Infoforex (UK)
                  Limited: At Completion (and prior to the taking effect of the
                  resignations of the Directors referred to in Clause 3.2.4) the
                  Sellers shall procure the passing of board resolutions of the
                  Company and IFX Infoforex (UK) Limited:-

                  3.3.1.   approving and sanctioning for registration (subject
                           where necessary to due stamping) the transfers in
                           respect of the Shares and any shares to which Clause
                           3.2.11 refers;

                  3.3.2.   appointing such persons as the Purchaser may nominate
                           to be the directors and secretary of the Company and
                           IFX Infoforex (UK) Limited;

                  3.3.3.   revoking all mandates to bankers of the Company or
                           IFX Infoforex (UK) Limited of any director or
                           secretary resigning under Clause 3.2.4 and giving
                           authority in favour of the directors appointed under
                           Clause 3.3.2 or such other persons as the Purchaser
                           may nominate to operate the bank accounts thereof;

                  3.3.4.   resolving that the registered office of the Company
                           and IFX Infoforex (UK) Limited be changed to 4
                           Carlton Gardens, London, SW1Y 5AA; and

                  3.3.5.   approving the execution of the Service Agreement.

         3.4.     Board Resolutions of Other Group Companies: At completion (and
                  prior to the taking effect of the resignations referred to in
                  Clause 3.2.4) the Sellers shall procure the passing of board
                  or shareholders resolutions of the Subsidiaries (other than
                  IFX Infoforex (UK) Limited) or the taking of such other
                  actions with respect to such Subsidiaries as are required
                  under applicable law to:-

                  3.4.1.   approve the transfers in respect of any shares of
                           such Subsidiaries to which Clause 3.2.11 refers;



                                      -10-
<PAGE>   14

                  3.4.2.   appoint such persons as the Purchaser may nominate to
                           be officers or directors (or equivalent in the
                           relevant jurisdictions) of such Subsidiaries; and

                  3.4.3.   revoke all mandates to bankers of the such
                           Subsidiaries of any director or secretary (or
                           equivalent in the relevant jurisdiction) resigning
                           under Clause 3.2 4 and giving authority in favour of
                           the persons appointed under Clause 3.4.2 or such
                           other persons as the Purchaser may nominate to
                           operate the bank accounts thereof.

         3.5.     Purchaser's Delivery: Upon compliance by the Sellers with the
                  provisions of Clauses 3.2, 3.3 and 3.4, the Purchaser shall:-

                  3.5.1.   deliver to the Sellers' Lawyers a counterpart of the
                           Tax Deed duly executed by the Purchaser;

                  3.5.2.   deliver to the Seller's Lawyers a counterpart of the
                           Service Agreement duly executed by the Company;

                  3.5.3.   pay the sum of US$5,000,000 to the Retention Account;
                           and

                  3.5.4.   pay the sum of US$77,450,000 to the following bank
                           account for and on behalf of CILT and the sum of
                           US$2,550,000 to the following bank account for and on
                           behalf of WWP:-

                                    Lloyds Bank Plc
                                    Threadneedle Street
                                    London EC2
                                    Sort Code: 30 00 09
                                    Account Number:  11880403

         3.6.     Payment Method: All sums payable by the Purchaser pursuant to
                  Clauses 3.5.3 and 3.5.4 shall be paid by wire transfer for the
                  same day value to the banks at the accounts specified, whose
                  receipt shall be an effective discharge of the Purchaser's
                  obligation to pay such sum to the Sellers. The Purchaser shall
                  not be concerned to see to the application or be answerable
                  for the loss or misapplication of such sums.

         3.7.     Waiver: The Purchaser may in its absolute discretion waive any
                  requirement contained in Clause 3.2. The Purchaser shall not
                  be obliged to complete the purchase of any of the Shares
                  unless the purchase of all the Shares is completed in
                  accordance with this Agreement and unless all of the
                  provisions of Clause 3.2 are complied with.

4.       WARRANTIES

         4.1.     Warranties; Survival:



                                      -11-
<PAGE>   15

                  4.1.1.   CILT warrants to the Purchaser in the terms of the
                           Warranties as at the date hereof; and

                  4.1.2.   WWP warrants to the Purchaser (the "WWP Warranties")
                           as at the date hereof that;

                           a)       WWP is the registered owner and the legal
                                    owner of the Shares listed with WWP's name
                                    in Part 1 of Schedule 2 and has good and
                                    valid title to such shares free and clear of
                                    all Encumbrances;

                           b)       except for this Agreement, none of the
                                    Shares registered in the name of WWP are
                                    subject to any voting trust, agreement,
                                    option or other contract, agreement,
                                    arrangement, commitment, or understanding,
                                    actual or contingent, restricting or
                                    otherwise relating to the voting, dividend
                                    rights, sale, or disposition of such Shares;

                           c)       this Agreement is a valid and binding
                                    obligation of WWP, enforceable against WWP
                                    in accordance with its terms; and

                           d)       the execution of this Agreement does not,
                                    the consummation of the transactions
                                    effected by this Agreement do not, and
                                    compliance with the terms of this Agreement
                                    will not violate, conflict with, require
                                    consent under or cause a default under any
                                    provision of any agreement, contract,
                                    arrangement, judgment, order, decree,
                                    statute, or law applicable to WWP or its
                                    property or assets;

                  and so that the remedies of the Purchaser in respect of any
                  breach of any of the Warranties or the WWP Warranties shall
                  continue to subsist notwithstanding completion of the sale and
                  purchase pursuant to this Agreement.

         4.2.     No Liability of the Company: Any information supplied by or on
                  behalf of any Group Company or by its officers, employees,
                  agents, accountants, lawyers or other advisers to the Sellers
                  or their respective officers, employees, agents, accountants,
                  lawyers or other advisers in connection with the Warranties,
                  the WWP Warranties or the Disclosure Letter or otherwise in
                  relation to the business and affairs of the Company or the
                  Subsidiaries shall not constitute a representation or warranty
                  or guarantee as to the accuracy thereof by any Group Company
                  and each of CILT and WWP hereby waives any and all claims
                  which it might otherwise have against any Group Company in
                  respect thereof. This shall not preclude either CILT and/or
                  WWP from claiming against the other or Mr. Kroll, Mr. F.
                  Ahlefeldt-Laurvig, Mr W. Ahlefeldt-Laurvig or Mr Yvan Verlaine
                  under any right of contribution or indemnity to which it may
                  be entitled.



                                      -12-
<PAGE>   16

         4.3.     CILT's Knowledge: Where any of the Warranties is qualified as
                  being made "so far as CILT is aware" or is qualified by any
                  similar expression, that statement shall be a reference to the
                  knowledge, awareness or belief of CILT having made due and
                  careful enquiry of Mr. Kroll, Mr. F. Ahlefeldt-Laurvig, Mr.
                  Yvan Verlaine and Mr Peyter Bjerregard and no other person,
                  and the knowledge (actual or constructive), awareness and
                  belief of each such person with respect to the relevant matter
                  shall be imputed to CILT.

         4.4.     Separate Obligations: Each of the Warranties and the WWP
                  Warranties shall be construed as a separate warranty and (save
                  as expressly provided to the contrary) shall not be limited by
                  the terms of any of the other Warranties or by any other term
                  of this Agreement.

         4.5.     Disclosure Letter: Subject to Clause 6.1, CILT shall be under
                  no liability under the Warranties in relation to any matter
                  forming the subject matter of a claim under the Warranties to
                  the extent that such matter or circumstances giving rise
                  thereto are fairly disclosed in the Disclosure Letter or
                  expressly provided for or stated to be exceptions under the
                  terms of this Agreement.

         4.6.     Documents: No letter, document or other communication shall be
                  deemed to constitute a disclosure for the purposes of the
                  Warranties unless the same is expressly referred to in the
                  Disclosure Letter.

         4.7.     Reliance: Each of CILT and WWP acknowledges that the Purchaser
                  has entered into this Agreement in reliance inter alia upon
                  the Warranties and the WWP Warranties.

         4.8.     Purchaser's Rights: Save as set out in this Agreement the
                  rights and remedies of the Purchaser in respect of any breach
                  of the Warranties or the WWP Warranties shall not be affected
                  by Completion, or failing to exercise or delaying the exercise
                  of any right, or remedy, or by any other event or matter,
                  except a specific and duly authorised written waiver or
                  release, and no single or partial exercise of any right or
                  remedy shall preclude any further or other exercise.

         4.9.     Waiver: Notwithstanding any rule of law or equity to the
                  contrary, any release, waiver or compromise or any other
                  arrangement of any kind whatever which the Purchaser may agree
                  to or effect in relation to one of the Sellers in connection
                  with this Agreement, and in particular the Warranties or the
                  WWP Warranties shall not affect the rights and remedies of the
                  Purchaser in relation to the other Seller.

         4.10.    Other Information: No information relating to any Group
                  Company of which the Purchaser has knowledge (actual or
                  constructive) other than that contained in or referred to in
                  this Agreement and the Disclosure Letter shall prejudice any
                  claim by the Purchaser under the Warranties or operate to
                  reduce any amount recoverable under the Warranties.



                                      -13-
<PAGE>   17

5.       WARRANTY LIMITATIONS

The provisions of Schedule 6 shall apply with respect to the liability of CILT
under the Warranties.

6.       INDEMNIFICATION

         6.1.     Indemnity: CILT shall indemnify the Purchaser against all
                  liabilities, losses, claims, damages, causes of action and
                  expenses of any kind, including legal and other professional
                  costs and interest other than legal and professional costs of
                  IFX Scandinavia incurred to date arising out of or in relation
                  to the litigation with Nihlmark as conducted in the Stockholm
                  Commercial Court and referred to in the Disclosure Letter (the
                  "Litigation") as disclosed in the Disclosure Letter PROVIDED
                  THAT the Purchaser shall allow CILT, at CILT's sole expense,
                  to take the sole conduct of the Litigation as CILT may deem
                  appropriate in connection with such Litigation in the name of
                  the Company (including, without prejudice to the generality of
                  the foregoing, the making of any agreement, settlement or
                  compromise with any third party in relation to any such claim
                  or adjudication without the prior consent of the Purchaser but
                  having first consulted with the Purchaser with regard to such
                  matters) and in connection therewith the Purchaser shall, upon
                  receiving such security for its costs as the Purchaser may
                  reasonably request, give or cause to be given to CILT such
                  assistance as CILT may reasonably require in avoiding,
                  disputing, resisting, settling, compromising, defending or
                  appealing the Litigation and shall instruct such solicitors or
                  other professional advisers as CILT may (with the Purchaser's
                  consent, such consent not to be unreasonably withheld)
                  nominate to act on behalf of IFX Scandinavia, as appropriate,
                  but to act in accordance with CILT's sole instructions and
                  PROVIDED FURTHER THAT the Purchaser shall and shall procure
                  that each Group Company shall make no admission of liability,
                  agreement, settlement or compromise with any third party in
                  relation to the Litigation without the prior written consent
                  of CILT.

         6.2.     Schedule 6: For the avoidance of doubt, the provisions of
                  Schedule 6 (other than paragraph 14 thereof) shall not apply
                  to any claim under this Clause 6.

7.       RETENTION

         7.1.     Retention: The sum referred to in Clause 2.3.1 (the
                  "Retention") shall on Completion be paid into an account (the
                  "Retention Account") at Lloyd's Bank TSB, Pall Mall, St.
                  James's Branch (Account number 3890394, sort code 30-00-08) to
                  be opened prior to Completion in the joint names of the
                  Sellers' Lawyers and the Purchaser's Lawyers (the "Account
                  Holders").

         7.2.     Initial Payment Date and Final Payment Date:

                  7.2.1.   On the date falling 6 months after Completion (the
                           "Initial Payment Date") the Account Holders shall pay
                           to CILT a sum (together with interest thereon) which
                           leaves (subject to clause



                                      -14-
<PAGE>   18

                           7.4.1) a balance in the Retention Account of
                           US$2,500,000 excluding interest but less banking
                           charges thereon (the "Initial Payment").

                  7.2.2.   On the first anniversary of Completion (the "Final
                           Payment Date") the balance of the monies standing to
                           the credit of the Retention Account after payment of
                           all Settled Claims therefrom pursuant to clause 7.5
                           (the "Final Payment") shall (subject to clause 7.4.1)
                           be paid to CILT and together the Initial Payment Date
                           and the Final Payment Date shall be "Payment Dates".

         7.3.     Payments out of Retention: The Purchaser may, from time to
                  time before a Payment Date, by notice to CILT require
                  immediate payment out of the Retention Account of the amount
                  of any claim by the Purchaser in relation to the Warranties or
                  under the Tax Deed and shall be entitled to be paid in
                  accordance with such a notice if and to the extent that:

                  7.3.1.   CILT has agreed the amount by giving written consent;
                           or

                  7.3.2.   a court of competent jurisdiction has established the
                           liability of CILT and awarded in respect of the
                           quantum of the claim and no right of appeal lies in
                           respect of such judgment or the parties are debarred
                           whether by the passage of time or otherwise from
                           exercising any such right of appeal or the other
                           party has stated in writing that it does not wish to
                           exercise its right of appeal;

                  a claim which has been finalised in accordance with 7.3.1,
                  7.3.2 and 7.3.3 and where the Purchaser has received payment
                  of any finalised amount due from CILT being a "Settled Claim".

7.4.     Outstanding claims:

         7.4.1.   If prior to the Initial Payment Date the Purchaser has
                  notified CILT in writing of a duly notified claim in relation
                  to the Warranties or under the Tax Deed (a "Notified Claim")
                  which has not become a Settled Claim or become a Lapsed Claim
                  as hereinafter defined on or before the Initial Payment Date
                  then the Initial Payment shall be reduced so that there shall
                  be retained in the Retention Account after the Initial Payment
                  Date

                  either:

                  a)       the sum of US$2,500,000 and whichever is the lesser
                           of:

                           (1)      the amount of the Initial Payment but for
                                    the provisions of this clause 7.4.1; or



                                      -15-
<PAGE>   19

                           (2)      the aggregate amount of the Notified Claim
                                    or Claims which have not become Settled
                                    Claims or Lapsed Claims as hereinafter
                                    defined; or

                  b)       (if lower) the amount then remaining in the Retention
                           Account

                  and the balance (if any) shall then be paid to CILT on the
                  Initial Payment Date in accordance with clause 7.5.

         7.4.2.   If prior to the Final Payment Date the Purchaser has notified
                  CILT in writing of a Notified Claim which has not become a
                  Settled Claim or been withdrawn on or before the Final Payment
                  Date then there shall be retained in the Retention Account
                  whichever is the lesser of:

                  a)       the whole of the amount then remaining in the
                           Retention Account; and

                  b)       the aggregate amount of the Notified Claims which
                           have not (i) become Settled Claims or (ii) been
                           withdrawn or lapsed due to failure of the Purchaser
                           to institute proceedings as required by paragraph 3.2
                           of Schedule 6 or in respect of which a court of
                           competent jurisdiction has established that CILT has
                           no liability or decided that there is no claim and no
                           right of appeal lies in respect of such judgment or
                           the parties are debarred whether by the passage of
                           time or otherwise from exercising any such right of
                           appeal or the other party has stated in writing that
                           it does not wish to exercise its right of appeal (in
                           any such case a ("Lapsed Claim");

                  and the balance (if any) shall then be paid to CILT on the
                  Final Payment Date in accordance with clause 7.5.

         7.5.     As soon as possible after a Notified Claim outstanding at the
                  relevant Payment Date has become a Settled Claim or has been
                  withdrawn CILT and the Purchaser shall instruct the Account
                  Holders to make payment out of the Retention Account:

                  7.5.1.   to the Purchaser of a sum equal to the amount for
                           which the Notified Claim or Claims aforesaid shall
                           have become Settled Claims in accordance with clause
                           7.3 in favour of the Purchaser together with a
                           proportion of the total interest earned on the monies
                           deposited in the Retention Account from the date of
                           payment into the Retention Account until the date of
                           payment out (being that proportion which the sum
                           payable to the Purchaser out



                                      -16-
<PAGE>   20

                           of the Retention Account pursuant to this sub-clause
                           bears to the total sums paid into the Retention
                           Account);

                  7.5.2.   as to the balance of the monies standing to the
                           credit of the Retention Account, (subject to clause
                           7.4) to CILT together with interest calculated on the
                           basis set out in paragraph 7.5.1 above.

         7.6.     Other Rights: The payment of any sums to the Purchaser in
                  accordance with Clause 7.4 in or towards satisfaction of any
                  claim under the Warranties or the Tax Deed shall not prejudice
                  or affect any other rights or remedies of the Purchaser for
                  the purpose of recovering any additional amount due from CILT
                  pursuant to the Warranties and the Tax Deed.

         7.7.     Interest: The interest accrued on the Retention Account shall
                  belong to CILT and the Purchaser in proportion to the
                  respective amounts of the Retention released to each of them
                  from time to time.

         7.8.     Instructions to Account Holders: CILT and the Purchaser shall,
                  as and when necessary, give instructions to the Account
                  Holders to procure compliance with this Clause 7. The Account
                  Holders shall not be required to take any action with respect
                  to the Retention Account except on the written instructions of
                  CILT and the Purchaser. The Retention Account shall be used
                  only for the purpose specified in this Clause 7.

         7.9.     Discharge: Any payment out of the Retention Account to CILT
                  shall be made to an account specified in writing by CILT to
                  the Purchaser and receipt from the bank holding such account
                  shall be an effective discharge of the Purchaser's and Account
                  Holders' obligations to pay such sums to CILT. The Purchaser
                  and the Account Holders shall not be concerned to see to the
                  application, or be answerable for the loss or misapplication,
                  of such sums. Any payment out of the Retention Account to the
                  Purchaser shall be made to such bank account as the Purchaser
                  shall notify in writing to the Account Holders.

         7.10.    Tax liability: Any tax liability of the Purchaser arising on
                  interest paid on any part of the Retention released to it
                  under sub-clause 7.3 shall be for the account of the
                  Purchaser.

8.       CONFIDENTIALITY

Each of the Sellers hereby severally covenants with the Purchaser that it shall
not at any time divulge to any third party whatsoever or use for its own or
another's advantage any of the designs, formulae, inventions or improvements
relating to products or prospective products designed, manufactured or sold by
any Group Company at any time before Completion or any other trade secrets or
confidential know-how or confidential financial or trading information as to
customers or suppliers or in relation to the business, finances, dealings or
affairs of any Group Company save only (i) insofar as such Seller proves the
same has become a matter of public knowledge (otherwise than by reason of a
breach of



                                      -17-
<PAGE>   21

this Clause 8) or (ii) insofar as may be required by law, in which case the
relevant Seller or Sellers shall give all reasonable notice of such disclosure,
consult in advance with the Purchaser as to such disclosure and limit such
disclosure strictly to the extent so required by law.

9.       ANNOUNCEMENTS, ETC.

         9.1.     Neither the making of this Agreement nor its terms shall be
                  disclosed by the Purchaser prior to or at Completion without
                  the prior consent of the Sellers (such consent not to be
                  unreasonably withheld or delayed), unless such disclosure is
                  required by law, and such disclosure shall then only be made
                  to such person or persons, in the manner and to the extent
                  required by law or as otherwise agreed with the Sellers and
                  after notifying the Sellers of the terms of such disclosure.

         9.2.     Neither the making of this Agreement nor its terms shall be
                  disclosed by any of the Sellers without the prior written
                  consent of the Purchaser (such consent not to be unreasonably
                  withheld or delayed) unless such disclosure is required by law
                  and disclosure shall then only be made after prior
                  consultation with the Purchaser as to the terms of such
                  disclosure, and only to the person or persons, in the manner
                  and to the extent required by law or as otherwise agreed by
                  the Purchaser.

10.      COSTS

Save as expressly otherwise provided in this Agreement each of the parties to
this Agreement shall bear his, her or its own legal, accountancy and other
costs, charges and expenses connected with the negotiation, preparation and
implementation of this Agreement and any other agreement incidental to or
referred to in this Agreement.

11.      ASSIGNMENT

         11.1.    The benefit of this Agreement may be assigned by the Purchaser
                  to any company of which it is a subsidiary or to any other
                  company which is a subsidiary of the Purchaser or of the
                  Purchaser's holding company provided always that no such
                  assignment shall operate to increase the liability of any
                  party hereto.

         11.2.    Subject to Clause 11.1, this Agreement and all rights and
                  benefits under it are personal to the parties to this
                  Agreement and may not be assigned at law or in equity without
                  the prior written consent of the other such parties.

12.      EFFECT OF COMPLETION

The terms of this Agreement shall, insofar as not performed at Completion and
subject as specifically otherwise provided in this Agreement, continue in force
after and notwithstanding Completion.



                                      -18-
<PAGE>   22

13.      ENTIRE AGREEMENT

This Agreement (together with any documents referred to in it) constitutes the
entire agreement between the parties to this Agreement in connection with the
subject matter of this Agreement. No such party has relied upon any
representation save for any representation expressly set out in this Agreement
(or any document referred to in this Agreement).

14.      WAIVER, AMENDMENT

         14.1.    Method of Waiver: There shall be no waiver of any term,
                  provision or condition of this Agreement unless such waiver is
                  evidenced in writing and signed by the waiving party.

         14.2.    Delay; Effect of Waiver etc.: Save as expressly set out in
                  this Agreement, no omission or delay on the part of any party
                  to this Agreement in exercising any right, power or privilege
                  under this Agreement shall operate as a waiver of such right,
                  power or privilege, nor shall any single or partial exercise
                  of any such right, power or privilege preclude any other or
                  further exercise of such right, power or privilege or of any
                  other right, power or privilege. Save as expressly set out in
                  this Agreement, the rights and remedies in this Agreement
                  provided are cumulative with and not exclusive of any rights
                  or remedies provided by law.

         14.3.    Written Variation: No variation to this Agreement shall be
                  effective unless made in writing and signed by all the parties
                  to this Agreement.

15.      FURTHER ASSURANCES

At any time after Completion, the Sellers shall at the reasonable cost of the
Purchaser execute all such documents and do such acts and things as the
Purchaser may reasonably require for the purpose of vesting in the Purchaser the
full legal and beneficial title to the Shares and giving to the Purchaser the
full benefit of this Agreement.

16.      PAYMENTS

All payments to be made pursuant to this Agreement shall be effected in the
lawful currency of the United States.

17.      TRUSTEE'S UNDERTAKING

         17.1.    Undertaking: The Trustee hereby undertakes with the Purchaser
                  that it will not before the expiry of 2 years from Completion
                  make any appointment to any beneficiary or discharge any
                  liability of any beneficiary or make any payment of capital to
                  any beneficiary or otherwise make any payment out of funds of
                  the Trust or release any assets of the Trust, except as
                  provided in Clauses 17.2 and 17.3.



                                      -19-
<PAGE>   23

         17.2.    Minimum Amounts: The Trustees shall be permitted to release
                  assets from the Trust to the extent (and only to the extent)
                  that:

                  17.2.1.  during the period from Completion until the first
                           anniversary of Completion (the "Initial Period"), the
                           amount of the Trust Assets does not at any time
                           during the Initial Period fall below US$20,500,000
                           plus the Trustees' bona fide estimate of any
                           Permitted Tax Liability and Permitted Trust Liability
                           and the amount of any Notified Claim that has not
                           become a Settled Claim or a Lapsed Claim;

                  17.2.2.  during the period from the first anniversary of
                           Completion until the second anniversary of Completion
                           (the "Second Period"), the amount of the Trust Assets
                           does not at any time during the Second Period fall
                           below the lesser of (i) US$20,500,000 plus the
                           Trustees' bona fide estimate of any Permitted Tax
                           Liability and Permitted Trust Liability and (ii)
                           US$17,000,000 plus the Trustees' bona fide estimate
                           of any Permitted Tax Liability or Permitted Trust
                           Liability and the amount of any Notified Claim that
                           has not become a Settled Claim or a Lapsed Claim on
                           or before such first anniversary; and

                  17.2.3.  after the second anniversary of Completion and for so
                           long as any Notified Claim has not become a Settled
                           Claim or a Lapsed Claim, the amount of the Trust
                           Assets does not fall below the Trustee's bona fide
                           estimate of any Permitted Tax Liability and Permitted
                           Trust Liability plus the amount of all such Notified
                           Claim or Claims.

         17.3.    Permitted Releases: The Trustees shall at any time be
                  permitted to release assets from the Trust for the purpose of
                  discharging a Permitted Tax Liability or a Permitted Trust
                  Liability or for the purpose of discharging a liability to the
                  Purchaser under this Agreement or the Tax Deed, provided that
                  any such release for the purposes of disclosing a Permitted
                  Tax Liability or a Permitted Trust Liability shall only reduce
                  the Trust Assets below the minimum amount specified in Clause
                  17.2 to the extent that the balance of the Trust Funds is not
                  sufficient for such purpose.

18.      NOTICE

         18.1.    Methods of Service: Save as specifically otherwise provided in
                  this Agreement any notice, demand or other communication to be
                  served under this Agreement may be served upon any party to
                  this Agreement only by posting by first class post or
                  delivering it or sending it by confirmed facsimile
                  transmission to the party to be served at its address above,
                  or facsimile number given below, or at such other address or
                  number as he, she or it may from time to time notify in
                  writing to the other parties:-



                                      -20-
<PAGE>   24

                  The Purchaser:                      Fax No:
                  For the attention of:               Davis Oros
                  with a copy to:                     Fax No:
                  For the attention of:               David Reymann

                  C.I. Law Trustees Limited:          Fax No: 01534 733 979
                  For the attention of:               Nicholas St. Clair Morgan

                  Warm Wool and Pile Limited:         Fax No: 00 34 91 449 0510
                  For the attention of:               Mr Yvan Verlaine

         18.2.    Proof of Service: A notice or demand served by first class
                  post shall be deemed duly served forty-eight hours after
                  posting and a notice or demand sent by facsimile transmission
                  shall be deemed to have been served at the time of
                  transmission and in proving service of such notice or demand
                  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 and, in the case of a
                  facsimile transmission, that such facsimile was duly
                  transmitted to a current facsimile number of the addressee at
                  the address referred to above.

19.      COUNTERPARTS

This Agreement may be executed in any number of counterparts and by the several
of the parties on separate counterparts, each of which when so executed and
delivered shall be an original, but all the counterparts shall together
constitute one and the same instrument.

20.      GOVERNING LAW AND SUBMISSION TO JURISDICTION

         20.1.    Governing Law: This Agreement shall be governed by, and
                  construed in accordance with, English law.

         20.2.    Jurisdiction: The parties to this Agreement hereby irrevocably
                  submit to the exclusive jurisdiction of the High Court of
                  Justice in London for the purpose of hearing and determining
                  any dispute arising out of, under or in connection with this
                  Agreement and for the purpose of enforcement of any judgment
                  against their respective assets.

         20.3.    Service: The parties to this Agreement agree that service of
                  any writ, notice or other document for the purpose of any
                  proceedings in such court shall be duly served upon it if
                  delivered or sent by registered post, to the address of the
                  party set out above or such other address as may from time to
                  time have been notified by such party to all the other parties
                  for the purpose of service of notices, demands or other
                  communications under this Agreement.

21.      INVALIDITY

If at any time any one or more of the provisions of this Agreement is or becomes
invalid, illegal or unenforceable in any respect under any law, the validity,
legality and



                                      -21-
<PAGE>   25

enforceability of the remaining provisions of this Agreement shall not be in any
way affected or impaired.











                                      -22-
<PAGE>   26


AS WITNESS the hands of the parties or their duly authorised representatives the
day and year first above written.



SIGNED:
by: NICHOLAS ST. CLAIR MORGAN
For and on behalf of
C.I.Law Trustees Limited




SIGNED: ____________________________
by: YVAN VERLAINE as duly authorised attorney of
Warm Wool and Pile Limited




SIGNED: ________________________________
by: Brian W. Keane
For and on behalf of
AETHER SYSTEMS, INC.




                                      -23-
<PAGE>   27

                                   SCHEDULE 1

                   PART 1: PARTICULARS RELATING TO THE COMPANY



Authorised share capital:        200,000 Ordinary Shares of L1 each





Issued share capital:            55,832 Ordinary Shares of L1 each





Directors:                       Bo Peter Hoegh Kroll
                                 Christian William Ahlefeldt-Laurvig





Secretary:                       Mitre Secretaries Limited





Auditors:                        BDO Stoy Hayward





Accounting reference date:       30th June





Registered Office:               Mitre House
                                 Aldersgate Street
                                 London EC1A 4DD




                                      -24-
<PAGE>   28



                                   SCHEDULE 1

                  PART 2: PARTICULARS RELATING TO SUBSIDIARIES
                                IFX (UK) LIMITED



Authorised share capital:            100 Ordinary Shares of L1 each





Issued share capital:                2 Ordinary Shares of L1 each





Director:                            Bo Peter Hoegh Kroll





Secretary:                           Mitre Secretaries Limited





Auditors:                            BDO Stoy Hayward





Accounting reference date:           30th June




Registered Office:                   Mitre House
                                     Aldersgate Street
                                     London
                                     EC1A 4DD




                                      -25-
<PAGE>   29



                            B: IFX INFOFOREX LIMITED



Authorised share capital:         10,000 ordinary shares of L1 each





Issued share capital:             2 ordinary shares of L1 each





Directors:                        Nicholas St Clair Morgan
                                  Ian St Clair Morgan





Auditors:                         BDO Stoy Haywood





Accounting reference date:        30th June





Registered Office:                PO Box 302
                                  Westaway Chambers
                                  39 Don Street,
                                  St Helier,
                                  Jersey,
                                  Channel Islands




                                      -26-
<PAGE>   30


                             C: IFX Scandinavia Ap S



Authorised share capital:                 DKK 200,000




Issued share capital:                     DKK 200,000




Directors:                                Kai Vincens Frederik Ahlefeldt-Laurvig
                                          Bo Peter Hoegh Kr-ll



Management:                               Kai Vincens Frederik Ahlefeldt-Laurvig





Auditors:                                 Nielsen & Christensen





Accounting reference date:                30th June





Registered Office:                        Bredgade 20 A,2
                                          1260 Copenhagen K




                                      -27-
<PAGE>   31



                             D: IFX Deutschland GmbH



Authorised share capital:                 DM 50,000.00




Issued share capital:                     DM 50,000.00




Directors:                                Bo Peter Hoegh Kroll
                                          Kai Vincens Frederik Ahlefeldt-Laurvig
                                          Thorsten Brenneisen





Auditors:                                 Falke & Co GmbH





Accounting reference date:                30th June





Registered Office:                        Frankfurt am Main




                                      -28-
<PAGE>   32



                           E: IFX The Netherlands B.V



Authorised share capital:                   2000 shares of NLG 100 each




Issued share capital:                       400 shares of NLG 100 each




Director:                                   Bo Peter Hoegh Kroll





Auditors:                                   Paardekooper & Hoffman





Accounting reference date:                  30th June





Registered Office:                          Hoogoorddleef 9 Kamer 219,
                                            1101BA Amsterdam






                                      -29-
<PAGE>   33



                          F: IFX Finanzas Espania S.A.



Authorised share capital:                   1,000 Shares of 10,000 pesatas each




Issued share capital:                       250 shares of 10,000 pesetas




Directors:                                  Bo Peter Hoegh Kroll
                                            Yvan Leon Bertha Verlaine





Auditors:                                   Gasso y Gia Auditores





Accounting reference date:                  30th June





Registered Office:                          161 Paseo de Castellana
                                            Madrid








                                      -30-
<PAGE>   34



                            G: Intext IFX Plc Limited



Authorised share capital:             100,000 shares of 2 Singapore dollars each





Issued share capital:                 20,000 shares of 1 Singpore dollar each





Directors:                            Elizabeth H Muljohardjo
                                      Bo Peter Hoegh Kroll



Secretary:                            Juliet Ang





Auditors:                             Sim Guan Seng & Co





Accounting reference date:            30th June





Registered Office:                    15 Phillip Street
                                      08-00 Tan Ean Kiam Building
                                      Singapore 048694




                                      -31-
<PAGE>   35



                              H: IFX France S.A.R.L



Authorised share capital:                   100 Shares of 100 Euros each




Issued share capital:                       100 Shares of 100 Euros each






Director:                                   Yvan Leon Bertha Verlaine





Accounting reference date:                  [June 30th]





Registered Office:                          Paris (10th), 9 Rue du Chateau d'Eau







                                      -32-
<PAGE>   36





                                   SCHEDULE 2

                   PART 1: OWNERSHIP OF SHARES OF THE COMPANY



C.I. Law Trustees Limited                    54, 176 Ordinary Shares

Warm Wool and Pile Limited                   1,656 Ordinary Shares


           PART 2 : OWNERSHIP OF SHARES OF THE SUBSIDIARIES AND INTEXT



1.       IFX (UK) Limited

         IFX Group Plc                       2 Ordinary Shares



2.       IFX SCANDIVAVIA APS

         IFX Group Plc                       DKK 200,000.00



3.       IFX The NETHERLANDS B.V


         IFX Infoforex Limited               400 shares of NLG 100 each



4.       IFX FINANXAS ESPANIA S.A

         C William Ahlefeldt-Laurvig         10 shares of 10,000 pesetas each

         IFX Group Plc                       240 shares of 10,000 pesetas each



5.       IFX Deutschland GmbH

         IFX Infoforex limited               DM 50,0000.00





                                      -33-
<PAGE>   37

6.       IFX France

         IFX Group Plc                       100 shares of 100 Euros each



7.       Intext IFX Pte Limited

         IFX Infoforex Ltd                   10,000 shares of 1 Singapore dollar
                                             each

         Intext Pte Ltd                      10,000 shares of 1 Singapore dollar
                                             each



8.       IFX Infoforex Limited

         IFX Group Plc 1 ordinary share of L1 each IFX Group Plc
         and Gary Owen 1 ordinary share of L1 each




                                      -34-
<PAGE>   38





                                   SCHEDULE 3

                                   WARRANTIES



A.       Constitution and Shares of Group Companies

B.       Accounts

C.       Business of the Group

D.       Directors, Employees and Employment matters

E.       Property

F.       Pensions

G.       Financial Facilities

H.       Intellectual Property

I.       Accuracy of Information

J.       Taxation

K.       Ownership of Shares




                                      -35-
<PAGE>   39



A.       CONSTITUTION AND SHARES OF GROUP COMPANIES

1.       Memorandum and Articles of the Company:

         The memorandum and articles of association of the Company in the form
         of the copies supplied to the Purchaser pursuant to the Disclosure
         Letter are complete and accurate in all respects and have embodied
         therein or annexed thereto copies of all resolutions and agreements
         required by law to be so attached; all amendments thereto (if any) were
         duly and properly made; and the Company has at all times carried on its
         business and affairs in all respects in accordance with its memorandum
         and articles of association and all such resolutions, agreements and
         amendments.

2.       Shares:

         There are no issued and outstanding shares, debentures or other
         securities of the Company other than the Shares All of the Shares are
         fully paid.

3.       Register of Members of the Company:

         The register of members of the Company contains true and accurate
         records of the shareholders from time to time of the Company and the
         Company has not been subject to any application for rectification of
         such register.

4.       Compliance of the Company:

         The Company has complied with the Companies Acts in all material
         respects and all such resolutions, returns and other documents required
         by the Companies Acts or any other legislation to be filed with or to
         be delivered to the Registrar of Companies or to any other authority
         whatsoever by the Company have been so filed or delivered and are true
         and accurate in all material respects. All charges in favour of the
         Company have (if appropriate) been registered in accordance with the
         provisions of Sections 395, 409, 410 and 424 Companies Act 1985.

5.       Financial Assistance:

         The Company has not at any time directly or indirectly provided any
         financial assistance for the purpose of the acquisition of shares in
         the Company or for the purpose of reducing or discharging any liability
         incurred in such an acquisition whether pursuant to Sections 155 and
         156 Companies Act 1985 or otherwise.

6.       Powers of Attorney:

         No Group Company has executed any power of attorney or conferred on any
         person other than its directors and employees any express or implied
         authority to enter into any transaction on behalf of or to bind such
         Group Company in any way.



                                      -36-
<PAGE>   40

7.       Subsidiaries and Other Operations:

(a)      No Group Company has any subsidiaries, owns any shares or stock in the
         capital of, or has any beneficial interest in, any other company or
         business organisation (other than the Subsidiaries and Intext), does
         not control or take part in the management of any other company or
         business organisation (other than the Subsidiaries and Intext) and no
         Group Company is a party to any agreement for the management or control
         of all or part of its business by any other person.

(b)      No Group Company has, nor has it ever had, any branch, office or
         permanent establishment outside the jurisdiction of its incorporation.

(c)      Each Subsidiary and so far as CILT is aware Intext is a company or
         corporation duly organised, validly existing and in good standing under
         the laws of the jurisdiction of its incorporation, with full power and
         authority to conduct its business in the manner and in the places where
         such business is conducted.

(d)      The copies of the constitutional documents of each of the Subsidiaries
         and Intext, are annexed to the Disclosure Letter and are correct and
         constitute the current version.

(e)      There are no issued and outstanding shares, debentures or other
         securities of any Group Company other than the shares held by the
         Company as set forth in the Disclosure Letter.

8.       Books and Records:

         All constituting documents, registers, certificates of incorporation,
         minute books, books of account and other corporate documents which each
         Group Company is required by applicable laws to maintain or have in its
         possession or under its control are so maintained, or are in the
         possession or under the control of the relevant Group Company, and, in
         all material respects, all such documents contain accurate records of
         the matters required by law to be recorded therein.




                                      -37-
<PAGE>   41

B.       ACCOUNTS

1.       The Accounts:

         The Accounts comply with all applicable laws, have been prepared in
         accordance with the consistent application of GAAP in the jurisdiction
         of the Group Company to which they relate and give a true and fair view
         of the assets and liabilities and of the state of affairs, financial
         position and results of the Group Company or Group Companies to which
         they relate as at the Accounts Date and its results for the period
         ended on that date.

2.       Management Accounts:

         The Management Accounts have been prepared in accordance with the same
         accounting principles and practices adopted for the Accounts and show a
         fair view of the assets and liabilities of the Company as the
         Management Accounts Date.

3.       Provision for debts:

         Reasonable provision has been made in the Accounts and Management
         Accounts in accordance with past practice and custom for bad and/or
         doubtful debts.




                                      -38-
<PAGE>   42

C.       BUSINESS OF THE GROUP

1.       Business since the Accounts Date:

         Since the Accounts Date:-

(a)      each Group Company has carried on its business in the ordinary course
         and, other than in the ordinary course of its business, no Group
         Company has acquired or disposed of or agreed to acquire or dispose of
         a substantial part of its assets, extended any credit, made any loan or
         made any other extraordinary payment;

(b)      no Group Company has declared or paid any dividend on any of its
         shares, effected any distribution of its assets or made any other
         payment to any of the Sellers or any connected person of any of the
         Sellers or any former shareholder of such Group Company;

(c)      no Group Company has entered into any agreement or arrangement with any
         customer to provide services on terms materially less favourable to the
         relevant Group Company than those on which such Group Company
         ordinarily contracts with clients;

(d)      no Group Company has released any debtor on terms that it pays less
         than the book value of its debt and no debt in excess of US$10,000
         owing to any Group Company has been deferred, subordinated or written
         off or has proved to any extent irrecoverable;

(e)      each Group Company has paid its creditors within the times agreed with
         such creditors and does not have any debts outstanding which are
         overdue for payment by more than 90 days; and

(f)      no Group Company has paid, or is under any obligation to pay, any
         management charges.

2.       Business since the Management Accounts Date:

         Since the Management Accounts Date there has been no material adverse
         change in the financial position of the Company.

3.       Acquisition and Disposal of Assets:

         No Group Company has, since the Accounts Date, acquired or agreed to
         acquire any asset for a consideration which is higher than the market
         value at the time of acquisition and has not disposed of or agreed to
         dispose of any asset for a consideration which is lower than the market
         value at the time of disposal.



                                      -39-
<PAGE>   43

4.       Charges and Title to Assets:

(a)      No Group Company has created or agreed to create, and no Group Company
         is aware of, any Encumbrance over any part of its undertaking or
         assets.

(b)      Each Group Company owns all the assets identified as being owned by
         that Group Company in the Accounts and Management Accounts and all
         assets acquired before Completion; such assets comprise all assets
         required for the proper and efficient conduct of the business of the
         relevant Group Company; and all such assets are in the possession or
         direct control of the relevant Group Company.

(c)      No Group Company has acquired or agreed to acquire any material asset
         on terms that property in that asset does not pass until payment is
         made.

5.       Onerous obligations:

(a)      No Group Company is a party to any material leasing agreement, material
         hire purchase agreement, material credit or conditional sale agreement,
         material agreement for payment on deferred terms, or any other similar
         agreement.

(b)      No Group Company is a party to any material contract, transaction,
         arrangement, or liability that:-

(i)      is outside the ordinary course of business of the relevant Group
         Company;

(ii)     is for a term of more than six months or is unlikely to have been fully
         performed, in accordance with its terms, more than six months after the
         date on which it was entered into;

(iii)    is incapable of termination in accordance with its terms, by the
         relevant Group Company, on notice of 60 days or less;

(iv)     is likely to involve an aggregate outstanding expenditure by the
         relevant Group Company of more than Pound Sterling100,000 in any one
         calendar year; or

(v)      provides for any company or other person to provide management or
         administrative services to the relevant Group Company;

(vi)     involves payment by the relevant Group Company by reference to
         fluctuations in the index of retail prices; or

(vii)    involves, or is likely to involve, the supply of goods or services, the
         aggregate sales value of which will represent in excess of 5% of the
         turnover of the Group for the preceding financial year.

6.       Contracts:

(a)      No Group Company is in default under any material agreement which would
         result or is likely to result in damages in excess of US$50,000 to
         which it is a party and



                                      -40-
<PAGE>   44

         so far as CILT is aware there are no circumstances likely to give rise
         to such a default.

(b)      So far as CILT is aware, no party with whom any Group Company has
         entered into any agreement or arrangement is in default in any material
         respect and there are no circumstances likely to give rise to such a
         default.

7.       Guarantees etc.:

(a)      No Group Company has given to any person any guarantee, indemnity,
         warranty, or bond or incurred any other similar obligation or created
         any security for or in respect of liabilities, actual or contingent, of
         any person.

(b)      No person has given any guarantee, indemnity, warranty, or bond or
         incurred any similar obligation, or given any security with respect to,
         any liability, actual or contingent, of any Group Company.

8.       Options over shares etc.:

(a)      Since the Accounts Date no share or loan capital or other securities of
         any Group Company has been created or issued nor has any agreement been
         made to create or issue any share or loan capital of any Group Company.

(b)      There are no options or other agreements outstanding that call or give
         any person the right to call (whether or not subject to conditions) for
         the issue of any share or loan capital or other securities of any Group
         Company, and the Sellers are not under any obligation of any kind
         whatsoever whether actual or contingent to sell, charge or otherwise
         dispose of any of the Shares or the Intext Shares or the shares of any
         Subsidiary or any interest in the Shares, the Intext Shares or the
         shares of any Subsidiary to any other person.

9.       Trust Deeds etc.:

         No Group Company is in breach of the terms of any trust deed, debenture
         or other document governing any borrowings, and so far as CILT is aware
         no event has occurred which will or might give any person the right to
         call for the immediate or early repayment of any stock or other
         borrowings of any Group Company or to terminate any loan facilities
         placed at the disposal of any Group Company or which would or is likely
         to cause a demand for the immediate repayment of any borrowings of any
         Group Company which are repayable on demand.

10.      Litigation:

(a)      No Group Company is engaged in any litigation, arbitration,
         prosecution, other legal proceeding, or employee or labour disputes
         (whether as plaintiff, defendant, or third party); no Group Company has
         received notice of, or been threatened with, any such proceedings in
         respect of which the relevant Group Company is or



                                      -41-
<PAGE>   45

         might be liable to indemnify any other person; so far as CILT is aware
         there are no claims, facts, or events likely to give rise to any such
         proceedings.

(b)      No Group Company is involved in, or the subject of, any proceedings,
         investigation, audit or enquiries before or by any governmental or
         municipal board of enquiry or commission or any other administrative
         body (whether judicial, quasi-judicial, or otherwise) in which any
         unfavourable judgment or decision might adversely affect the business
         of the relevant Group Company or the value of any of its assets; and so
         far as CILT is aware there are no claims, facts or events that are
         likely to give rise to any such proceedings, investigation, audit or
         enquiries.

11.      Environmental Liability:

(a)      So far as CILT is aware each Group Company is now, and has at all
         times, conducted its business in compliance with all applicable
         environmental laws. No Group Company has received any written notice,
         claim or other communication alleging any actual or potential liability
         in respect of Environmental Matters.

(b)      So far as CILT is aware there are no circumstances, activities,
         practices or actions which have occurred or are occurring or have been
         or are in existence in the conduct of the business of any Group Company
         which may give rise to any liability under applicable Environmental
         Laws.

12.      Business name:

         No Group Company carries on, or has in the past 3 years carried on, any
         business under any name other than its corporate name.

13.      Effect of Sale of the Shares:

         No Group Company is a party to any agency, distribution, marketing,
         service (other than maintenance of office equipment) licensing,
         purchasing, selling or other similar agreement, or to any agreement,
         which is capable of termination without liability for compensation by
         any other person on a change in the management, control, or
         shareholding of any Group Company or by reason of the sale of the
         Shares or the Intext Shares under this Agreement. As a result of a
         change in the management, control, or, as appropriate, the shareholding
         of any Group Company or after Completion:-

(a)      so far as CILT is aware no supplier of a Group Company will cease, or
         is likely or intends to cease or be entitled to cease, supplying the
         relevant Group Company.

(b)      so far as CILT is aware no client of a Group Company will cease, or
         become entitled to cease or is likely or intends to cease, its
         relationship with the relevant Group Company or may substantially
         reduce its existing level of business with the relevant Group Company;



                                      -42-
<PAGE>   46

(c)      so far as CILT is aware no Group Company will be in default under any
         agreement or arrangement and no Group Company will lose any benefit,
         right or privilege which it currently enjoys and no liability or
         obligation of any Group Company will be increased;

(d)      so far as CILT is aware no person will be relieved of any obligation or
         become entitled to exercise any right in respect of any Group Company;
         and

(e)      as far as CILT is aware no senior employee of any Group Company will
         leave.

14.      Insurance:

(a)      Each Group Company has produced to the Purchaser and listed and
         summarised in the Disclosure Letter all insurance policies in effect in
         relation to its business and assets, and all such policies are in full
         force and effect and not avoidable.

(b)      All premiums for policies of insurance maintained by any Group Company
         due to be paid on or before Completion have been paid.

(c)      No Group Company has filed a claim under any insurance policy, and so
         far as CILT is aware there are no circumstances likely to give rise to
         a claim, to the insurers avoiding liability under a policy, or to an
         increase in premiums.

15.      Capital Commitments:

         Since the Accounts Date no Group Company has made or agreed to make any
         capital expenditure, or incurred or agreed to incur any capital
         commitments or disposed of or realised any capital assets or any
         interest in capital assets.

16.      Compliance with Statutory Provisions:

(a)      The business of each Group Company has at all times been carried on
         within the terms of its memorandum and articles of association,
         charter, by-laws or other constitutional documents.

(b)      Each Group Company has conducted and is conducting its business in
         accordance with all applicable laws and regulations whether of its
         jurisdiction of incorporation or elsewhere the failure to comply with
         which would have a material adverse effect on the Group.

(c)      No Group Company has received notice that it or its officers, agents or
         employees (during the course of their duties in relation to it) have
         committed or omitted to do any act or thing the commission or omission
         of which is or could be in contravention of any act, order, regulation
         or the like (whether in the jurisdiction of its incorporation or
         otherwise) giving rise to any fine, penalty, default proceedings or
         other liability on its part.



                                      -43-
<PAGE>   47

17.      Licences:

(a)      Each Group Company has all licences and permissions authorities and
         consents required for the carrying on of its business effectively in
         the places and in the manner in which such businesses are now carried
         on and there is no subsisting breach by a Group Company of the terms or
         conditions of any such licences, permissions, authorities or consents
         which would have a material adverse effect on the Group.

(b)      There are no served or, so far as CILT is aware, threatened proceedings
         or any other circumstances involving or related to any Group Company
         that might lead to the suspension, revocation, or material change or
         modification of such licences or permissions and there is no other
         reason why any of them should be suspended, threatened or revoked.

18.      Grants:

         No Group Company has applied for or received any financial assistance
         from any supranational, national, or local authority or governmental
         agency.

19.      Relationship with directors:

(a)      After Completion, no Group Company will have any liability to or any
         contractual or other arrangements with any of the Sellers or with any
         current director of a Group Company other than pursuant to this
         Agreement or the Deed of Covenant or the Tax Deed, the service contract
         and option arrangements with Bo Kroll, the service contract of Yvan
         Verlaine and the consultancy agreement with Warm Wool and Pile Limited
         or to any spouse or associated company or connected person of any of
         them or any partnership in which any such person or company is a
         partner.

(b)      After Completion, no director of a Group Company, nor any spouse or
         associated company or connected person of any of the Sellers or any
         director of a Group Company, or any partnership in which any such
         person or company is a partner will owe any money to any Group Company.

20.      Maintenance of Assets:

(a)      Maintenance contacts are in full force and effect in respect of all
         assets of any Group Company which it is normal and prudent to have
         maintained by independent or specialist contractors and in respect of
         all assets which any Group Company is obliged to maintain or repair
         under any leasing or similar agreement.

(b)      All assets of any Group Company have been regularly maintained to a
         good technical standard and in accordance with safety regulations
         normally observed in relation to assets of that description and in
         accordance with the terms and conditions of any applicable leasing or
         similar agreement.



                                      -44-
<PAGE>   48

21.      Accounts Payable:

         No account payable of any Group Company is unpaid and outstanding
         beyond the earlier of the date (if any) on which it falls due to be
         paid contractually or the date on which it falls to be paid in
         accordance with the ordinary course of dealing between the relevant
         Group Company and the supplier in question.

22.      Accounts Receivable:

(a)      There are no debts owing to any Group Company other than trade debts
         incurred in the ordinary and usual course of business (none of which
         exceeds Pound Sterling50,000 and which do not exceed Pound
         Sterling400,000 in aggregate).

(b)      No part of the amounts included in the Accounts, or subsequently
         recorded in the books of any Group Company, as owing by any debtor is
         overdue by more than twelve weeks, or has been released on terms that
         any debtor pays less than the full book value of the debt or has been
         written off or has proved to any extent to be irrecoverable or is now
         regarded by the relevant Group Company as irrecoverable in whole or in
         part.

23.      Joint Ventures and Partnerships:

         No Group Company is, or has agreed to become, a member of any joint
         venture, consortium, partnership, other unincorporated association,
         shareholders' agreement or similar arrangement; and no Group Company
         is, nor has agreed to become, a party to any agreement or arrangement
         for sharing commission or other income.

24.      Reuters Agreements:

         Each Group Company has complied in all material respects with its
         obligations under any data feed agreements with Reuters to which it is
         a party and has incorporated into its standard subscriber agreements
         all terms required to be incorporated therein in accordance with such
         data feed agreements.



                                      -45-
<PAGE>   49



D.       DIRECTORS, EMPLOYEES AND EMPLOYMENT MATTERS

1.       The particulars of directors and officers of each Group Company shown
         in Schedule 1 are true and accurate and no person not named in Schedule
         1 is a director or officer of any Group Company.

2.       The Disclosure Letter contains accurate details of all officers,
         employees, consultants and representatives of each Group Company,
         including all remuneration payable and all other benefits provided or
         which each Group Company is bound to provide (whether now or in the
         future) to each officer, employee, consultant or representative of such
         Group Company (or to any other person with respect to the services of
         any such officer, employee, consultant or representative) and all
         profit sharing, share option incentive, bonus arrangements and medical,
         hospitalisation, disability, or other employee benefits, including
         payments in connection with termination of any office, employment or
         contract, to which such Group Company is a party, and including
         discretionary arrangements or benefits and sets out details of all
         standard forms of employment or consultancy or service agreements and
         staff handbooks.

3.       The terms of employment or engagement of all employees, agents,
         consultants, independent contractors, representatives and professional
         advisers of each Group Company permit the relevant Group Company to
         terminate them on not more than three months' notice given at any time
         without liability for payment of compensation or damages (except for
         statutory indemnities or compensation), and no Group Company has
         entered into any agreement or arrangement for the management of all or
         part of its business other than with its directors or employees.

4.       No past or present director, officer, employee, consultant, independent
         contractor or representative of any Group Company has any claim,
         including a claim for redundancy payment, against such Group Company
         for loss of office or arising out of the termination of his office or
         employment or contract, there is no event that might give rise to any
         such claim and there is no outstanding liability in respect of any such
         claim.

5.       No industrial action involving the workforce of any Group Company,
         official or unofficial, is now occurring or threatened; so far as CILT
         is aware no event has occurred which is likely to give rise to such
         action; and no Group Company has been engaged or involved in any
         dispute with any employee or any labour troubles, whether directly
         involving the relevant Group Company or not.

6.       Each Group Company has fully paid to date all contributions to maintain
         any medical, hospitalisation, disability or other employee benefit
         plan, complied with its obligations to maintain those plans or
         arrangements, and has not received any notice of an intent or threat to
         terminate or impair the plans or arrangements, and so far as CILT is
         aware there are no circumstances indicating that the plans or
         arrangements are not valid and in full force and effect.



                                      -46-
<PAGE>   50

7.       No promise or assurance of any kind, whether legally binding or not,
         has been made to any officer or employee of any Group Company or any
         consultant, independent contractor or representative of any Group
         Company with respect to any adjustment in his or her remuneration,
         emoluments or benefits of any kind from those described in the
         Disclosure Letter, and no Group Company has made any gratuitous payment
         or given any benefit or promised to do so in connection with the actual
         or proposed termination or suspension of employment or variation of any
         contract of employment or contract for services of any present or
         former director or employee.

8.       No person whose services are devoted wholly or mainly to the business
         of any Group Company is employed or engaged under any consultancy,
         contractor or other similar arrangement.

9.       No present director, officer or employee of any Group Company has given
         or received notice terminating his employment and completion of this
         Agreement will not entitle any director, officer or employee of any
         Group Company to terminate his employment or trigger any entitlement to
         any payment.

10.      Each Group Company has in relation to each of its directors, employees,
         consultants and representatives complied with all applicable laws,
         codes of conduct, guidelines, terms and conditions of employment or
         engagement, orders and awards relevant to their terms and conditions of
         service.

11.      There are no amounts owing to any present or former director, officer,
         employee, consultant or representative of any Group Company other than
         one month's arrears of remuneration accrued or due or for reimbursement
         of business expenses incurred within a period of three months preceding
         the date of this Agreement and no moneys or benefits other than in
         respect of remuneration or emoluments of employment are payable to or
         for the benefit of any present or former director, officer, employee,
         consultant or representative of any Group Company.




                                      -47-
<PAGE>   51


E.       THE PROPERTIES

1.       The Properties comprise all the properties owned, occupied or otherwise
         used in connection with its business by any Group Company, and are
         occupied, owned or used by right of ownership or under lease or
         licence, the terms of which permit the occupation or use.

2.       The information contained in Schedule 5 is complete and accurate in all
         respects.

3.       So far as CILT is aware, the buildings and other structures on the
         Properties are in good and substantial repair and fit for the purposes
         for which they are used.

4.       The leases and licences listed in Schedule 5 are the only agreements by
         which any Group Company has entered into obligations and/or has any
         financial or other entitlement relating to any real property.

5.       Each Group Company has paid the rent and observed and performed the
         obligations on the part of the tenant and the conditions contained in
         the lease under which any Property leased by it is held, and the last
         demand (or receipts for rent if issued) were unqualified and the leases
         are valid and in full force.

6.       All licences, consents and approvals required from the landlords and
         any superior landlords under the leases of any Property have been
         obtained and the obligations on the part of the tenant contained in the
         licences, consents and approvals have been duly performed and observed.

7.       There are no rent reviews under the leases of any of the Properties in
         progress.

8.       No obligation necessary to comply with any notice or other requirement
         given by the landlord under the lease of any Property is outstanding
         and unobserved or unperformed.

9.       There is no material obligation to reinstate any Property by removing
         or dismantling any alteration made to it by a Group Company or any
         predecessor in title to a Group Company.




                                      -48-
<PAGE>   52



F.       PENSIONS

1.       No Group Company operates, makes payments to or for, or has any
         obligation related to, a pension arrangement or scheme.

2.       There is no claim for and no Group Company is under any legal or moral
         obligation to pay any pension or make any other payment upon death,
         retirement, or disability to or on behalf of any person who is now or
         has been an employee, consultant, independent contractor or agent of a
         Group Company and is not a party to any scheme or arrangement having as
         its purpose or one of its purposes the making of payments or the
         provision of such benefits. No such pension or payment is now being
         paid voluntarily and no ex gratia payments have been or are proposed to
         be made by any Group Company to any current or former director,
         employee, consultant, independent contractor or representative, or
         their dependants or relatives.

3.       No promise or assurance has been made to any present or former
         director, employee, consultant, independent contractor or
         representative of any Group Company that any pension rights or
         entitlements would be continued, introduced, increased or improved.




                                      -49-
<PAGE>   53

G.       FINANCIAL FACILITIES

1.       Borrowings:

         The aggregate of all amounts borrowed by any Group Company (from
         whatever source) does not exceed any limitation on its borrowing
         contained in its constitutional documents, any debenture, or other
         instrument.

2.       Continuance of Facilities:

         Full and accurate details of each overdraft, loan, or other financial
         facility outstanding or available to each Group Company and an accurate
         copy of each such overdraft, loan, or other financial facility has been
         provided to the Purchaser. So far as CILT is aware no Group Company has
         done anything to affect adversely, impair, or prejudice the continuance
         of any such facility in full force and effect and in particular no
         Group Company has received notice from any lenders of money requiring
         repayment or intimating the enforcement of any security and so far as
         CILT is aware there are no current circumstances in existence as at the
         date of this Agreement that would reasonably be expected to give rise
         to any such notice and no Group Company has repaid or become liable to
         repay any loan or indebtedness in advance of its stated maturity date;
         and

3.       Bank Accounts:

         A statement of the credit or debit balances of each bank account of
         each Group Company as at close of business on the business day
         immediately preceding the date of this Agreement has been supplied to
         the Purchaser. No Group Company has any other bank or deposit accounts
         (whether in credit or overdrawn) not included in the statement. Since
         the statement there have been no payments out of any such accounts
         except for routine payments.




                                      -50-
<PAGE>   54



H.       INTELLECTUAL PROPERTY RIGHTS

1.       A Group Company is the sole legal and beneficial owner free from
         Encumbrances of the Listed Intellectual Property and (where such Listed
         Intellectual Property is registered) the registered proprietor thereof
         and owns no other registered or material unregistered Intellectual
         Property.

2.       Save as may appear from the Listed Intellectual Property Agreements no
         person has been authorised to make any use whatsoever of any
         Intellectual Property owned by any Group Company.

3.       Save as may appear from the Listed Intellectual Property Agreements a
         Group Company owns all the material Intellectual Property that any
         Group Company uses.

4.       All the Intellectual Property rights owned or used by any Group Company
         are valid and enforceable and nothing has been done, omitted or
         permitted whereby any of them has ceased or might cease to be valid and
         enforceable. So far as CILT is aware none of the processes or products
         of any Group Company infringes any Intellectual Property of any other
         person in circumstances which might entitle that person to make a claim
         against the relevant Group Company.

5.       So far as CILT is aware, none of the Listed Intellectual Property is
         the subject of any claims or proceedings for opposition or contested
         ownership.

6.       CILT is not aware of any infringement of the Listed Intellectual
         Property or of any rights relating to it by any person.

7.       There are no outstanding claims against any Group Company for
         infringement of any Intellectual Property used (or which have been
         used) by any Group Company and no such claims have been settled by the
         giving of any undertakings which remain in force. No Group Company has
         received any actual or threatened claim that any of the Listed
         Intellectual Property rights is invalid nor are the Sellers aware of
         any reason why any granted patents included in the Listed Intellectual
         Property should be amended.

8.       Confidential information and know-how used by any Group Company is kept
         confidential. No Group Company has disclosed (except in the ordinary
         course of its business or under the Listed Intellectual Property
         Agreements) any of its know-how, trade secrets or lists of customers to
         any other person.

9.       Such of the Listed Intellectual Property as is registered has been
         maintained and all application and renewal fees for such registered
         Intellectual Property have been duly paid on time.

10.      The Listed Intellectual Property Agreements are all the material
         Intellectual Property agreements to which any Group Company is a party;
         each of them is valid and binding; and no Group Company is in material
         breach of any of the provisions of



                                      -51-
<PAGE>   55

         such agreements.

11.      All persons retained or employed by any Group Company who, in the
         course of their work for such Group Company will or might reasonably be
         expected to bring into existence Intellectual Property or things
         protected by Intellectual Property are, so far as is reasonably
         practicable, individually bound by agreements with the relevant Group
         Company whereby all Intellectual Property which such persons may bring
         into existence during their work for a Group Company vests in the
         relevant Group Company. All such agreements contain terms which, so far
         as is reasonably practicable, prevent such persons disclosing any
         confidential information about the relevant Group Company and its
         business.

12.      None of the Intellectual Property owned by any Group Company is subject
         to compulsory licensing or the granting of any licences of right nor,
         so far as CILT is aware, will it become so by operation of law.

13.      Data Protection:

         Each Group Company is registered and has otherwise complied in all
         material respects with the requirements of all applicable data
         protection legislation.

14.      Marketing and Other Promotional Material:

         So far as the CILT is aware, all current advertising, marketing and
         sales promotions by any Group Company comply with all applicable laws,
         regulations, codes of practice and self-regulatory schemes. No Group
         Company has been disciplined under any law, regulation, scheme or code
         in respect of any such advertising, marketing or sales promotion; no
         complaint has been made against it in respect of such advertising,
         marketing or sales promotion; and there are no outstanding complaints
         or disciplinary proceedings against any Group Company in respect of
         such advertising, marketing or sales promotion.

15.      Identification and ownership of Information Technology:

    a.   Particulars of all material IT Systems and all material IT Contracts
         are disclosed in the Disclosure Letter.

    b.   Save as disclosed in the Disclosure Letter, all material IT Systems
         are controlled by the Group, and are not wholly or partly dependent on
         any facilities or services not under the exclusive control of a Group
         Company.

    c.   So far as CILT is aware, all the IT Contracts are valid and binding.
         None of the IT Contracts has been the subject of any material breach
         or default, or is liable to be terminated or otherwise adversely
         affected by the transaction contemplated by this Agreement.



                                      -52-
<PAGE>   56

    d.   The Group has in its possession or in its control the source code of
         all Software owned by any Group Company.

16.      Computer operation and maintenance:

    a.   All IT Services are being and have been provided in accordance with
         all applicable specifications.

    b.   The Group has full and unrestricted access to and use of the IT
         Systems, and no third party agreements or consents are required to
         enable the Group to continue such access and use following completion
         of the transaction contemplated by this Agreement.

    c.   So far as CILT is aware no person has had unauthorised access to the
         IT Systems or any data stored thereon. Each Group Company operates a
         documented procedure, and has taken reasonable steps to avoid
         infections by viruses and unauthorised access.

    d.   All material data processed using the IT Systems and/or the IT
         Services has been regularly archived in hard copy form. Such hard
         copies have been properly stored and catalogued.

    e.   Each Group Company has taken reasonable steps to ensure that its
         business can continue in the event of a failure of the IT Systems
         (whether due to natural disaster, power failure or otherwise).

    f.   The Group has sufficient technically competent and trained employees
         to ensure proper handling, operation, monitoring and use of the IT
         Systems.




                                      -53-
<PAGE>   57



I.       ACCURACY OF INFORMATION

1.       All information contained in this Agreement and the Disclosure Letter
         was when given and is now complete and accurate in all material
         respects and no matter or fact has not been disclosed the omission of
         which renders any such information materially untrue or misleading.




                                      -54-
<PAGE>   58



J.       TAXATION

PART 1 -TAXATION OF THE GROUP

1.       Tax Returns, etc.:

         Each Group Company has filed all Tax returns which are required to be
         filed in respect of such Group Company and has paid all Tax which has
         become due pursuant to such Tax returns or pursuant to any assessment
         which has become payable; all such Tax returns are complete and
         accurate in all material respects and disclose all Taxes required to be
         paid by the relevant Group Company.

         During the last six years no Group Company has received notice of any
         action, suit, non-routine investigation, audit, claim, lien or
         assessment pending or proposed or threatened with respect to Tax, and
         so far as CILT is aware no basis exists therefor and neither the
         Sellers nor any Group Company have waived or been requested to waive
         any statute of limitations in respect of Tax associated with such Group
         Company.

2.       Provisions:

         The Accounts make full provision or reserve for all Tax for which any
         Group Company is accountable at the Accounts Date whether or not any
         Group Company has or might have any right of reimbursement against any
         other person.

         Proper provision has been made and shown in the Accounts for deferred
         Tax in accordance with GAAP.

3.       Employees:

(a)      During the last six years each Group Company has properly deducted Tax,
         including social security and other payroll Tax, as required by
         applicable law from all payments to, or to be treated as made to, or
         benefits provided for, or to be treated as provided for, employees or
         ex-employees of such Group Company.

(b)      During the last six years each Group Company has duly accounted to the
         Tax Authorities for sums so deducted (or has made proper reserve or
         provision for such payments in the Accounts); and each Group Company
         has materially complied with all its reporting obligations to the Tax
         Authorities in connection with any such payments made or benefits
         provided.

4.       Sales at undervalue/overvalue and Deductions:

(a)      All of the transactions of each Group Company have been entered into on
         an arm's length basis, and the consideration charged or received or
         paid by the relevant Group Company on all transactions entered into by
         it has been equal to the consideration that might have been expected to
         be charged received or paid (as appropriate) between independent
         persons dealing at arm's length.



                                      -55-
<PAGE>   59

(b)      So far as CILT is aware, other than items identified in the Taxation
         Computations of any Group Company for the periods ending on the
         Accounts Date which may recur in subsequent periods no material
         payments paid or payable by any Group Company or which any Group
         Company is under an existing obligation to pay in the future are or may
         be disallowed as deductions.

5.       Payment of Tax:

         Each Group Company has duly and punctually paid, or will prior to
         Completion so pay, all Tax to the extent that such Group Company is
         liable to pay such Tax prior to Completion and is not liable to pay any
         penalty or interest in connection with any such Tax.

6.       Sales at Book Value:

         No chargeable gain or profit would arise if any assets of any Group
         Company (other than trading stock) were to be realised for a
         consideration equal to the amount of the book value thereof as shown or
         included in the Accounts.

7.       Tax Schemes; Compliance:

         No Group Company has entered into or been a party to or otherwise
         involved in any scheme or arrangement designed wholly or partly for the
         purpose of avoiding, evading or deferring Tax which is contrary to law.

8.       Value Added Tax:

         Each Group Company:

(a)      is a registered taxable person for the purpose of applicable value
         added tax regulations [and has not at any time been treated as a member
         of a group of companies for such purpose and has not made any
         application to be so treated] and no circumstances exist whereby the
         Company would or might become liable for value added tax as an agent;

(b)      has complied in all material respects with the requirements and
         provisions of all applicable value added tax regulations and has made
         and maintained, and will pending Completion make and maintain, accurate
         and up to date records, invoices, accounts and other documents required
         by or necessary for the purposes of all applicable value added tax
         regulations and the Company has at all times without material delay
         paid and made all payments and returns required under all applicable
         value added tax regulations;

(c)      has not made any exempt supplies in consequence of which it is or will
         be unable to obtain credit for all input tax paid by it during any
         value added tax period ending after the Accounts Date.




                                      -56-
<PAGE>   60



PART II - TAXATION OF THE COMPANY-

      INFORMATION AND RETURNS

9.       Disclosures:

         All statements and disclosures made to any Tax Authority for Tax
         purposes were when made and remain complete and accurate in all
         material respects.

10.      Clearances:

         No action has been taken by the Company in respect of which any consent
         or clearance from any Tax Authority was required save in circumstances
         where such consent or clearance was validly obtained, and where any
         conditions attaching thereto were and will, immediately following
         Completion, continue to be met.

11.      Claims and Elections:

         The documents relating to Tax disclosed in the Disclosure Letter
         contain full particulars of all matters relating to Tax in respect of
         which the Company is or at Completion will be entitled:

(a)      to make any claim (including a supplementary claim), disclaimer or
         election for relief under any taxation statute;

(b)      to appeal against any assessment or determination relating to Tax;

(c)      to apply for a postponement of Tax.

PROVISION FOR AND PAYMENT OF TAX

12.      Payment of Tax:

         The Company is not liable, nor has it within six (6) years prior to the
         date hereof been liable, to pay any penalty or interest in connection
         with any such Tax.

13.      Secondary Liability:

         No transaction or event has occurred in consequence of which the
         Company is or may be held liable for any Tax or deprived of Relief
         otherwise available to it or may otherwise be held liable for or to
         indemnify any person in respect of any Tax for which some other company
         or person was primarily liable (whether by reason of any such other
         company being or having been a member of the same group of companies or
         otherwise).



                                      -57-
<PAGE>   61

CORPORATION TAX

14.      Sales at undervalue/overvalue and Deductions:

         No notice or enquiry pursuant to Section 770A T.A. has been made in
         connection with any transactions of the Company and there are no facts
         or circumstances likely to give rise to an amendment of the Company's
         return or any discovery assessment or discovery determination pursuant
         to Section 770A T.A.

CAPITAL ASSETS

15.      Capital Allowances:

(a)      No balancing charge in respect of any capital allowances claimed or
         given would arise if any assets of the Company were to be realised for
         a consideration equal to the amount of the book value thereof as shown
         or included in the Accounts.

(b)      All necessary conditions for all capital allowances (as defined in
         Section 832(1) T.A.) claimed by the Company were at all material times
         satisfied and remain satisfied and the Company has not since the
         Accounts Date become liable for any balancing charge.

16.      Finance Leases:

         The Company is not a lessee under a lease to which the provisions of
         Schedule 12 F.A. 1997 apply or could apply.

17.      Investment Grants:

         The Company has not received any investment grant or similar payment or
         allowance receivable by virtue of any statute.

18.      Short-life Assets:

         The Company has not made any election under Section 37 Capital
         Allowances Act 1990 nor is it taken to have made such an election under
         Section 37(8)(c) of that Act.

19.      Deductions:

         All rents, annual payments and other sums of an income nature paid or
         payable by the Company since the Accounts Date or which the Company is
         under an obligation to pay in the future are wholly allowable as
         deductions or charges in computing income for the purposes of
         corporation tax.

20.      Loan Relationships:

         All interest, discounts or premiums payable by the Company in respect
         of its loan relationships within the meaning of Chapter II Part IV F.A.
         1996 are capable of



                                      -58-
<PAGE>   62

         being brought into account as a debit for the purposes of that chapter
         as and to the extent that they are from time to time recognised in the
         Company's accounts (assuming that the accounting policies and methods
         adopted for the purpose of the accounts continue to be so adopted).

DISTRIBUTIONS

21.      Repayments of Share Capital:

(a)      The Company has not at any time since its incorporation repaid or
         agreed to repay or redeemed or agreed to redeem or purchased or agreed
         to purchase (or made any contingent purchase contract within the
         meaning of Section 165 Companies Act 1985) in respect of any of its
         issued share capital or any class thereof. Further, the Company has not
         (save as disclosed in the Disclosure Letter) after 6th April 1965
         capitalised or agreed to capitalise in the form of shares, debentures
         or other securities, or in paying up amounts unpaid on any shares
         debentures or other securities, any profits or reserves of any class or
         description or passed, or agreed to procure or seek the passing of, any
         resolution to do so.

(b)      The Company has not made (and will not be deemed to have made) any
         distribution within the meaning of Sections 209, 210 and 211 T.A. since
         5th April 1965 except dividends properly authorised and shown in its
         Accounts nor is the Company bound to make any such distribution.

22.      Capital Distributions:

         The Company has not received any capital distribution to which the
         provisions of Section 189 T.C.G.A. could apply.

CHARGEABLE GAINS

23.      Value shifting:

         The Company has not been involved in any scheme or effected any
         arrangements whereby the value of any asset has been or will be reduced
         such that Sections 29 and/or 30 T.C.G.A might be applicable.

24.      Valuation of Assets:

         The Company has not disposed of or acquired any asset so that Section
         17 T.C.G.A. might apply to restrict the consideration deemed to be
         given on such disposal or acquisition.

25.      Chargeable Debts:

         No gains chargeable to corporation tax on chargeable gains will accrue
         to the Company on the disposal of any debt owing to the Company.



                                      -59-
<PAGE>   63

26.      Reconstructions:

         The Company has not been involved in any share for share exchange or
         any scheme of reconstruction or amalgamation such as are mentioned in
         Sections 136 or 139 T.C.G.A. under which shares or debentures have been
         or will be issued or assets have been or will be transferred.

27.      Depreciatory transactions:

         No loss which has arisen or which may hereafter arise on a disposal by
         the Company of shares in or securities of any company is liable to be
         reduced by virtue of the application of Section 176 T.C.G.A.
         (transactions in a group) or Section 177 T.C.G.A. (dividend stripping).

ANTI-AVOIDANCE PROVISIONS

28.      Transactions in Securities:

         The Company has not:-

(a)      become liable for Tax; or

(b)      received and will not receive or be the subject of or be adversely
         affected by any Claim for Tax; arising under or imposed by or resulting
         from the operation of Sections 703-709, 776-778, 729-746, (whether
         alone or in conjunction with any other provisions of any taxation
         statutes) and which wholly or partly results or arises from or is
         computed by reference to circumstances existing or events occurring at
         any time on or before the date hereof, whether alone or in conjunction
         with other circumstances, arising before or after Completion.

29.      Sale and lease back of land:

         Since its incorporation, the Company has not entered into any
         transaction as is mentioned in Sections 34-37 or Section 780 T.A.

30.      Close Company:

         The Company has at all times been a close company as defined by
         Sections 414 and 415 T.A. but has not in any accounting period
         beginning after 31 March 1989 been a close investment-holding company
         as defined in Section 13A T.A. No distribution within the meaning of
         Section 418 T.A. has been made by the Company; since the Accounts Date
         any outstanding loans or advances made or agreed to be made by the
         Company within Sections 419 and 420 or 422 T.A. have been disclosed in
         the Disclosure Letter and the Company has not released or written off
         or agreed to release or write off the whole or any part of any such
         loans or advances.



                                      -60-
<PAGE>   64

GROUP OF COMPANIES

31.      Group Relief:

(a)      Neither the Company nor any of the Subsidiaries has made or agreed to
         make a surrender of group relief under Pt X, Chap IV T.A. or a
         surrender of any amount of surplus advance corporation tax under T.A.
         to any company other than the Company or a Subsidiary. The Company is
         not liable to make a payment for group relief or for the surrender of
         advance corporation tax to any company other than the Company or a
         Subsidiary. The Company has not received a payment for group relief
         which may be liable to be refunded in whole or in part other than the
         Company or a Subsidiary. The Company has not agreed to surrender any
         right to receive a Tax refund under Section 102 F.A. 1989.

(b)      The Company does not own an asset which was acquired within the last
         six years from another company, which was, at the time, a member of the
         same group of companies (as defined in Section 170 T.C.G.A.) as the
         Company, and which owned that asset otherwise than as trading stock
         within Section 173 T.C.G.A.

(c)      The execution or completion of this Agreement will not result in any
         profit or gain being deemed to accrue to the Company for Tax purposes,
         whether under Section 179 T.C.G.A. or otherwise.

INHERITANCE TAX

32.      Gifts:

(a)      The Company is not, and will not become, liable to be assessed to
         inheritance tax as donor or donee of any gift or transferor or
         transferee of value (actual or deemed), nor as a result of any
         disposition, chargeable transfer or transfer of value (actual or
         deemed) made by, or deemed to be made by, any other person.

(b)      The Company has not been a party to associated operations in relation
         to a transfer of value within the meaning of Section 268 I.T.A.

(c)      No asset owned by the Company is subject to any sale, mortgage or
         charge by virtue of Section 212 I.T.A.

33.      Inland Revenue Charge:

         There is no unsatisfied liability to inheritance tax attached or
         attributable to the Shares or any asset of the Company, and in
         consequence no person has the power to raise the amount of such Tax by
         sale or mortgage of, or by a terminable charge on, any of the Shares or
         assets of the Company as mentioned in Section 212 I.T.A. and none of
         the Shares or assets of the Company are subject to an Inland Revenue
         Charge within Section 237 I.T.A.



                                      -61-
<PAGE>   65

VALUE ADDED TAX

34.      The Company is and has at all times within the last six years been a
         fully taxable person within the meaning of V.A.T.A. and regulations
         thereunder.

35.      The Company has not waived exemption from VAT in respect of any of the
         Properties under Paragraph 2, Schedule 10, V.A.T.A.

36.      The Disclosure Letter contains full particulars of all claims which
         have been, or could be, made by the Company under Sections 78 or 79
         V.A.T.A. There are no circumstances by virtue of which an assessment
         under Section 78A V.A.T.A. has been, or could be, made on the Company.

37.      So far as CILT is aware there are no existing circumstances by virtue
         of which any refund of Tax obtained or claimed under Section 36
         V.A.T.A. may be required to be repaid. There are no circumstances by
         virtue of which there could be a clawback of input tax from the Company
         under Section 36(4A) V.A.T.A.

STAMP DUTY AND CAPITAL DUTY

38.      All documents in the enforcement of which the Company is or may be
         interested which are in the possession or control of the Company have
         been duly stamped; and since the Accounts Date the Company has not been
         a party to any transaction whereby the Company was or is liable to
         stamp duty reserve tax.

39.      The Company has not within the past two years made a claim for Relief
         or exemption under Section 42 F.A. 1930.




                                      -62-
<PAGE>   66



K.       OWNERSHIP OF SHARES

1.       CILT is the registered owner and the legal owner of the Shares listed
         with CILT's name in Part 1 of Schedule 2 and has good and valid title
         to such shares free and clear of all Encumbrances. The Shares
         constitute all of the issued share capital of the Company.

2.       Except for this Agreement, none of the Shares registered in the name of
         its CILT are subject to any voting trust, agreement, option or other
         contract, agreement, arrangement, commitment, or understanding, actual
         or contingent, restricting or otherwise relating to the voting,
         dividend rights, sale, or disposition of such Shares.

3.       The Company, or the Subsidiary so identified in Part 2 of Schedule 2,
         is the registered owner of the shares of each Subsidiary and Intext as
         set out in Part 2 of Schedule 2 and has good and valid title to such
         shares free and clear of all Encumbrances. Such shares of each
         Subsidiary constitute all of the issued share capital of such
         Subsidiary. Such shares of Intext constitute not more than or less than
         50% of the share capital of, and carries not more or less than 50% of
         the voting rights of, Intext.

4.       None of the shares of the Subsidiaries nor of Intext are subject to any
         voting trust, agreement, option or other contract, agreement,
         arrangement, commitment or understanding, actual or contingent,
         restricting or otherwise relating to the voting, dividend rights, sale
         or disposition of such shares.

5.       This Agreement is a valid and binding obligation of CILT, enforceable
         against CILT in accordance with its terms.

6.       The execution of this Agreement does not, the consummation of the
         transactions effected by this Agreement do not, and compliance with the
         terms of this Agreement will not violate, conflict with, require
         consent under or cause a default under any provision of any agreement,
         contract, arrangement, judgment, order, decree, statute, or law
         applicable to CILT or its property or assets.




                                      -63-
<PAGE>   67

                                   SCHEDULE 4

                                    TAX DEED

THIS DEED OF COVENANT is made the  day of                     April 2000

BETWEEN:-

(1)      C.I. Law Trustees Limited of Westaway Chambers, 39 Don Street, St.
         Helier, Jersey (the "Covenantor"); and

(2)      Aether Systems, Inc. (the "Purchaser").

WHEREAS  this Deed of Covenant is entered into pursuant to the provisions of an
         Agreement (the "Share Purchase Agreement") made on the [ ] day of [ ]
         2000 pursuant to which the Purchaser agreed to purchase the whole of
         the share capital of IFX Group plc, a public limited company
         incorporated in England and Wales under the Companies Acts under number
         03224875 ("the Company")

NOW THIS DEED WITNESSES as follows:-

1.       Interpretation:

         1.1.     Subject to Clause 1.2 and unless the context otherwise
                  indicates, words, expressions and abbreviations defined in the
                  Share Purchase Agreement shall have the same meanings in this
                  Deed and any provisions of the Share Purchase Agreement
                  concerning matters of construction or interpretation shall
                  mutatis mutandis apply to this Deed.

         1.2.     The following words, expressions and abbreviations used in
                  this Deed shall, unless the context otherwise requires, have
                  the following meanings:-

<TABLE>
<S>                                      <C>
                  "Claim for Tax"        any claim, assessment, demand, notice or other
                                         document issued  by or on behalf of any authority
                                         or body whatsoever and of whatever country which
                                         claims payment of Tax or seeks to or may deprive
                                         any Group Company of any Relief or any right to
                                         repayment of Tax which would otherwise have been
                                         available;

                  "Event"                every event, act, omission, default, occurrence,
                                         circumstance, transaction, dealing or arrangement
                                         of any kind whatsoever done, or omitted to be
</TABLE>


                                      -64-
<PAGE>   68

<TABLE>
<S>                                      <C>
                                         done, by a Group Company or which in any way
                                         concerns or affects a Group Company;

                  "Liability for Tax"    means any liability of any Group Company to make a
                                         payment of Tax and includes:-

                                         (a)      the loss or reduction of any Relief which
                                         would, but for such loss, have been available to
                                         such Group Company to the extent that the Relief
                                         has been taken into account in reducing any
                                         provision for Tax (including deferred Tax) in the
                                         Accounts; or

                                         (b)      the loss or reduction of any right of any
                                         Group Company to a repayment of Tax to the extent
                                         that that right has been taken into account as an
                                         asset in the Accounts or in reducing any provision
                                         for Tax (including deferred Tax) in the Accounts;
                                         or

                                         (c)      the setting off of any such right to
                                         repayment as is mentioned in paragraph (b) above
                                         against any Claim for Tax which would, but for
                                         such setting off, give rise to a claim under this
                                         Deed;

                  "Relief"               any allowance, credit, exemption, deduction, or
                                         relief (including, without limitation, loss
                                         relief) from, in computing, against or in respect
                                         of Tax;

                  "taxation statutes"    all statutes, and all laws, decrees, orders and
                                         regulations, including subordinate legislation, of
                                         whatever jurisdiction providing for or imposing
                                         any Tax;

                  "Tax" or "Taxes"       all forms of taxation, whether direct or indirect,
                                         duties (including stamp duty), imposts, payroll
                                         withholding, (including national insurance
                                         contributions) and levies whenever and in whatever
                                         jurisdiction imposed, including all
</TABLE>




                                      -65-
<PAGE>   69

<TABLE>
<S>                                      <C>
                                         charges, interest, fines and penalties relating
                                         thereto;

                  "Tax Authority"        the Inland Revenue, Customs & Excise, Department
                                         of Social Security and any other governmental or
                                         other authority whatsoever competent to impose any
                                         Tax, whether in the United Kingdom or elsewhere;
</TABLE>

2.       Indemnity:


         2.1.     Subject to Clause 2.2, the Covenantor hereby covenants with
                  the Purchaser to pay the Purchaser an amount equal to:-

                  2.1.1.   any Liability for Tax that arises as a consequence of
                           an Event occurring or entered into at or before
                           Completion; and

                  2.1.2.   the liability of any Group Company and/or the
                           Purchaser for all reasonable third party costs and
                           expenses reasonably and properly incurred by the
                           Purchaser or such Group Company in connection with
                           any Claim for Tax giving rise to (or which would, if
                           it were successful, give rise to) a liability covered
                           by Clauses 2.1(a) or 2.1(b), including all legal
                           proceedings relating thereto and the settlement of
                           any Claim for Tax and reasonable steps taken to avoid
                           any liability under a Claim for Tax whether actual,
                           threatened or anticipated.

         2.2.     The covenant contained in Clauses 2.1(a) and 2.1(b) shall not
                  apply to any Liability for Tax to the extent that:

                  2.2.1.   a full provision or reserve in respect of the
                           Liability for Tax has been made in the Accounts or to
                           the extent that such liability was taken into account
                           in computing the amount of such provision or reserve
                           or disclosed in the Accounts; or

                  2.2.2.   it would not have arisen but for a change in
                           administrative practice or in legislation or a
                           decision of any Court made after Completion (whether
                           relating to taxation, rates of taxation or otherwise)
                           or the withdrawal of any extra-statutory concession
                           previously made by any taxing authority (whether or
                           not the change purports to be effective
                           retrospectively in whole or in part);

                  2.2.3.   it arises as a result only of any change after
                           Completion in the accountancy practice or principles,
                           accounting policy, any tax reporting practice, or the
                           length of any account period for tax purposes of any
                           Group Company;



                                      -66-
<PAGE>   70

                  2.2.4.   sums in respect of the matter giving rise to the
                           Liability for Tax have been recovered under the
                           Warranties;

                  2.2.5.   such liability is in respect of or by reference to
                           income, profits or gains earned, or arises in
                           consequence of an Event occurring, since the Accounts
                           Date in the ordinary course of business of a Group
                           Company;

                  2.2.6.   to the extent that such liability would not have
                           arisen but for an act, default, omission or
                           transaction of the Purchaser or of the Company or
                           their respective successors in title effected after
                           Completion other than in the case of the Company any
                           such act, default, omission or transaction carried
                           out or effected under a legally binding commitment
                           created on or before Completion or carried out or
                           effected in the ordinary course of business of a
                           Group Company as carried on at Completion.

                  2.2.7.

                           a)       such liability arises by virtue of any
                                    claim, election, surrender or disclaimer
                                    made or notice or consent given after
                                    Completion by a Group Company or the
                                    Purchaser (including the disclaimer of the
                                    whole or part of any industrial building or
                                    other capital allowances under the
                                    provisions of any Taxation Statute) other
                                    than where the making, giving or doing of
                                    which was taken into account in the
                                    preparation of the Accounts;

                           b)       such liability would not have arisen or
                                    would have been reduced but for a failure or
                                    omission on the part of the Purchaser or a
                                    Group Company after Completion to make any
                                    election, claim, surrender or disclaimer, or
                                    give any notice or consent or do any other
                                    thing, in relation to Taxation, the
                                    anticipated making giving or doing of which
                                    was taken into account in computing any
                                    provision or reserve for Taxation in the
                                    Accounts;

                           c)       such liability would not have arisen but for
                                    a cessation of, or any change in the nature
                                    or conduct of, any trade carried on by a
                                    Group Company, being a cessation or change
                                    occurring on or after Completion;

                  2.2.8.   such liability has been made good by insurers or
                           otherwise compensated for without cost to the
                           Purchaser or a Group Company;



                                      -67-
<PAGE>   71

                  2.2.9.   such liability is in respect of stamp duty reserve
                           tax payable on the transfer or agreement to transfer
                           the Shares pursuant to the Share Purchase Agreement;

                  2.2.10.  such liability is attributable to a Group Company
                           ceasing to be entitled to the small companies' rate
                           of corporation tax whether by virtue of an increase
                           in the level of profits for the accounting period
                           during which Completion takes place that are
                           attributable to the period following Completion or by
                           virtue of an increase in the number of associated
                           companies of a Group Company after Completion;

                  2.2.11.  such liability arises or is increased as a
                           consequence of any failure by the Purchaser to comply
                           with its obligations under this Deed including for
                           the avoidance of doubt its obligations to procure
                           that a Group Company carries out any act or does
                           anything;

                  2.2.12.  such liability could have been extinguished or
                           reduced by the use of any Relief in respect of any
                           Tax which existed at Completion and which was not
                           shown as an asset in the Accounts and was not taken
                           into account in computing any provision or reserve
                           for Taxation (including deferred Tax) in the
                           Accounts;

                  2.2.13.  any income, profits or gains to which such liability
                           is attributable were earned or received by, or
                           accrued to, a Group Company but were not reflected in
                           the Accounts;

3.       Gross-up: All sums payable by the Covenantor under this Deed shall be
         paid free and clear of all deductions or withholdings (including Tax)
         unless the deduction or withholding is required by law, in which event,
         or in the event that the Purchaser shall incur any liability for Tax
         chargeable or assessable in respect of any payment pursuant to this
         Deed, the Covenantor shall pay such additional amounts as shall be
         required to ensure that the net amount received by the Purchaser will
         equal the full amount which would have been received by it had no such
         deduction or withholding been made and/or no such liability to Tax been
         incurred and:-

         3.1.     (a)   in applying this Clause 2.3 no account shall be taken of
                  the extent to which any liability for Tax may be mitigated or
                  offset by any Relief or repayment available to the Purchaser,
                  if such Relief or repayment would otherwise have been used to
                  mitigate or offset any other liability for Tax of the
                  Purchaser or any holding company of the Purchaser or any
                  subsidiary of any such holding company; and

         3.2.     (b)   if, following the payment of an additional amount under
                  this Clause 2.3, the Purchaser subsequently obtains a saving
                  in Tax or a repayment or credit in respect of the deduction,
                  withholding or liability for Tax giving rise to such amount,
                  the Purchaser shall pay to the Covenantor a sum equal to the
                  amount of such repayment or saving (in both cases to the
                  extent only of



                                      -68-
<PAGE>   72

                  the said additional amount) such payment to be made within 10
                  days of the receipt of the repayment or the reduction of Tax
                  due and payable, as the case may be.

4.       Timing:

         4.1.     Where the Covenantor becomes liable to make any payment
                  pursuant to Clause 2, the due date for the making of that
                  payment shall be within 20 days after the date on which notice
                  setting out the amount of Tax due accompanied by reasonably
                  satisfactory evidence from the auditors of the Company that
                  the amount demanded is due and payable is received from the
                  Purchaser in accordance with Clause 4 of this Deed or, if
                  later:-

                  4.1.1.   insofar as the claim arises under Clause 2.1(a), the
                           day before the day on which a payment of Tax becomes
                           finally due under the Claim for Tax in question or
                           the day before the day on which any repayment (or
                           increased repayment) of Tax (which but for such Claim
                           for Tax would have been available) would have been
                           due;

                  4.1.2.   insofar as the claim arises under Clause 2.1(b), the
                           day before the day on which payment of Taxation would
                           have been finally due from the relevant Group Company
                           had the Liability for Tax therein mentioned been
                           satisfied by the relevant Group Company by payment
                           rather than by Utilisation of Relief and for this
                           purpose it shall be assumed that the Claim for Tax
                           would have been made and all Tax would have become
                           due at the latest date on which payment could have
                           been made without incurring interest, penalties or
                           fines for late payment; and

                  4.1.3.   insofar as the claim arises pursuant to Clause
                           2.1(c), the day before the day on which the costs and
                           expenses fall due for payment.

         4.2.     For the purpose of this Clause, no payment shall be treated as
                  having been made until it has been received by the Purchaser
                  in cleared funds.

         4.3.     If any sum due under Clause 2 is not paid by the Covenantor by
                  the due date, the same shall carry interest (from such date
                  until the date of payment) at the rate of two per cent over
                  the base rate for the time being of Lloyds Bank plc (or, in
                  the absence of such rate, at such equivalent rate as the
                  Purchaser shall select).

5.       Time Limit:

         5.1.     The liability of the Covenantor to make any payment under this
                  Deed shall cease on the second anniversary of the date of this
                  Deed except: (a) in respect of any claim of which the
                  Purchaser gives notice to the Covenantor before that date
                  specifying (in reasonable detail) the nature of the claim and




                                      -69-
<PAGE>   73

                  the amount of Tax claimed and any such claim which may be made
                  shall (if it has not previously been satisfied, settled or
                  withdrawn) be deemed to be withdrawn at the expiration of 6
                  months from the date of giving notice of such claim unless
                  legal proceedings in respect thereof have been commenced by
                  issuing and service or such proceedings against the
                  Covenantor, or (b) in respect of any Claim for Tax alleging
                  fraudulent conduct.

6.       Corresponding Benefit:

         6.1.     If the Purchaser or the relevant Group Company is or may be
                  entitled to recover from a person (including any Tax
                  authority) a sum in respect of any Claim for Tax which gives
                  rise to a liability on the part of the Covenantor under this
                  Deed, then:

                  6.1.1.   the Purchaser shall give the Covenantor details of
                           the entitlement as soon as practicable;

                  6.1.2.   the Purchaser shall at the request of the Covenantor
                           and at the Covenantor's expense having been
                           indemnified and secured to the Purchaser's
                           satisfaction take all appropriate steps to recover or
                           to procure the recovery of the sum, keeping the
                           Covenantor fully informed of the progress of any
                           action taken;

                  6.1.3.   the Purchaser shall within 14 days of recovery of any
                           sum, pay that sum to the Covenantor so far as it does
                           not exceed any payments already made by the
                           Covenantor in respect of the relevant Claim for Tax
                           and pay to the Covenantor any interest or repayment
                           supplement received in respect of that sum so far as
                           paid to the Covenantor; and

                  6.1.4.   so far as not so repaid or paid, the amount of the
                           sum recovered (including any interest or repayment
                           supplement) shall be set against the liability of the
                           Covenantor in respect of the relevant Claim for Tax.

7.       Resistance of Claims:

         7.1.     If the Purchaser becomes aware of any Claim for Tax which may
                  result in the Purchaser having a claim against the Covenantor
                  under this Deed, the Purchaser shall give or procure that
                  written notice is given to the Covenantor in the manner
                  provided in Clause 4 of this Deed as soon as is reasonably
                  practicable and no later than 10 days after becoming aware of
                  the claim and the Covenantor shall, except in the case of
                  fraud on the part of the Covenantor, be entitled at their sole
                  discretion (but after consultation with the Purchaser) to
                  resist such Claim for Tax in the name of the Purchaser or the
                  relevant Group Company or any of them but at the expense of
                  the Covenantor and to have the conduct of any appeal or
                  incidental negotiations PROVIDED THAT:-



                                      -70-
<PAGE>   74

                  7.1.1.   the relevant Group Company and the Purchaser shall be
                           kept fully informed of all matters pertaining to the
                           dispute; and

                  7.1.2.   no material communication, written or otherwise,
                           pertaining to the dispute (and in particular no
                           proposal for or consent to any settlement or
                           compromise thereof) shall be transmitted to any Tax
                           Authority or any other taxation authorities or
                           governmental body or authority without the same
                           having been submitted to, and approved by, the
                           Purchaser and the relevant Group Company; and

                  7.1.3.   no application shall be made for postponement of Tax
                           unless the Purchaser and the relevant Group Company
                           shall be provided with such security as they may
                           reasonably require in respect of sums subsequently
                           becoming payable under this Deed.

         7.2.     The Purchaser shall procure that the relevant Group Company
                  shall give the Covenantor reasonable co-operation, access and
                  assistance, technical or otherwise, for the purpose of
                  resisting such a Claim for Tax and shall provide such
                  assistance as the Covenantor may reasonably require and all
                  such information as may be available to the Purchaser at the
                  relevant Group Company for avoiding, disputing, resisting,
                  appealing or compromising or contesting any Claim for Tax
                  provided that:-

                  7.2.1.   the Covenantor shall not commence any proceedings
                           beyond a court of first instance with respect to a
                           Claim for Tax unless they have been advised by
                           specialist Tax Counsel selected by agreement between
                           the Purchaser and the Covenantor (or in default of
                           agreement, selected by the President for the time
                           being of the Law Society, after disclosure of all
                           relevant information and documents, that it is
                           reasonable to resist the Claim for Tax in the manner
                           proposed by the Covenantor; and

                  7.2.2.   the Covenantor reimburse the Purchaser an amount
                           equal to all reasonable costs and expenses which may
                           thereby be incurred.

8.       Over-provisions:

         8.1.     If the auditors for the time being of a Group Company shall
                  certify (at the request and expense of the Covenantor) that
                  any provision for Taxation in the Accounts has proved to be an
                  over-provision then the amount of such over-provision shall be
                  dealt with in accordance with clause 7.3.

         8.2.     If the auditors for the time being of a Group Company shall
                  certify (at the request and expense of the Covenantor) that
                  any Liability for Taxation which has resulted in a payment
                  having been made or becoming due from the Covenantor under
                  this Deed has given or will give rise to a corresponding
                  saving for a Group Company which would not otherwise have
                  arisen then as and when the liability of the Company to make
                  an actual payment of or in



                                      -71-
<PAGE>   75
                           respect of Taxation is reduced by reason of the
                           utilisation of that corresponding saving the amount
                           by which that liability for Taxation is so reduced
                           shall be dealt with in accordance with clause 7.3.

         8.3.     Where it is provided under clause 7.1 or 7.2 above that any
                  amount (the "Relevant Amount") is to be dealt with in
                  accordance with this clause 7.3:

                  8.3.1.   the Relevant Amount shall first be set off against
                           any payment then due from the Covenantor under this
                           Deed; and

                  8.3.2.   to the extent there is an excess refund should be
                           made to the Covenantor of any previous payment or
                           payments made by the Covenantor under this Deed and
                           not previously refunded under this clause up to the
                           amount of such excess; and

                  8.3.3.   to the extent that the excess referred in clause
                           7.3.2 above is not exhausted the remainder of that
                           excess shall be carried forward and set off against
                           any future payment or payments which become due from
                           the Covenantor under this Deed

         8.4.     Where any such certification as is mentioned in clause 7.1 or
                  7.2 above has been made the Covenantor or the Purchaser or a
                  Group Company may request the auditors of a Group Company for
                  the time being at the expense of the parties so making the
                  request to review such certification in the light of all
                  relevant circumstances including any facts which have become
                  known only since such certification and to certify whether
                  such certification remains correct or whether in the light of
                  those circumstances the amount that was the subject of such
                  certification should be amended.

         8.5.     If the auditors certify under clause 7.5 above that an amount
                  previously certified should be amended that amended amount
                  should be substituted for the purposes of clause 7.3 as the
                  Relevant Amount in respect of the certification in question in
                  place of the amount originally certified and such adjusting
                  payment (if any) as may be required by virtue of the
                  aforementioned substitution shall be made as soon as
                  practicable by the Covenantor or (as the case may be) to the
                  Covenantor.

         8.6.     The Purchaser undertakes to supply, and undertakes to procure
                  that the Company shall supply, to the Purchaser and
                  subsequently to any firm of accountants nominated to deal with
                  any such dispute in accordance with clause 7.6 (with copies to
                  the Covenantor) all documents accounts notices papers and
                  other necessary information as may be reasonably required for
                  the purpose of making any such determination as to whether
                  there is or has been any over-provision or a corresponding
                  saving for the purposes of this clause 7.



                                      -72-
<PAGE>   76

9.       Purchaser's Covenants:

         9.1.     The Purchaser hereby covenants with the Covenantor to pay to
                  the Covenantor an amount equal to:-

                  9.1.1.   any liability or increased liability to Taxation of
                           the Covenantor or any person falling within s767A(2)
                           of the Taxes Act or any person falling with s767AA(4)
                           of Taxes Act as the result of any corporation tax
                           assessed on a Group Company remaining unpaid; and

                  9.1.2.   any costs and expenses reasonably incurred by the
                           Covenantor or other relevant person in connection
                           with such liability under clause 8.1.1.

         9.2.     Clauses 6 (Resistance of claims) and 3 (timing) shall apply to
                  the covenants contained in clause 8.1 as they apply to the
                  covenants in clause 2 substituting references to the
                  Covenantor with references to the Purchaser and vice versa and
                  making any other necessary modifications.

10.      Tax Returns:

         10.1.    The Covenantor or its duly authorised agents shall prepare the
                  tax returns and computations of the Company for all accounting
                  periods ending on or prior to the Accounts Date, to the extent
                  that the same shall not have been prepared before Completion,
                  subject to such tax returns being submitted in draft form to
                  the Purchaser or its duly authorised agents for comment a
                  reasonable time before the same are due to be sent to the
                  relevant tax authority. If the U.K. Purchaser or its duly
                  authorised agents shall make any comments or suggestions and
                  communicate them to the Covenantor within a reasonable time of
                  receipt by the Purchaser of such draft tax returns, the
                  Covenantor shall not unreasonably refuse to adopt such
                  comments or suggestions.

         10.2.    The Purchaser shall procure that the returns and computations
                  mentioned in clause 9.1 shall be authorised, signed and
                  submitted to the appropriate tax authority without amendment
                  or with such amendments as the Covenantor shall approve, such
                  approval not to be unreasonably withheld or delayed, and shall
                  give the Covenantor or its agents all such reasonable
                  assistance as may be required to agree those returns and
                  computations with the appropriate authorities PROVIDED THAT
                  the Purchaser shall not be obliged to take any such action as
                  is mentioned in this clause 9.2 in relation to any return that
                  is not complete and accurate in all material respects.

         10.3.    The Covenantor or its duly authorised agents shall prepare all
                  documentation and will have conduct of all matters (including
                  correspondence) relating to the tax returns and computations
                  of a Group Company for all accounting periods ended on or
                  prior to the Balance Sheet Date provided that the



                                      -73-
<PAGE>   77

                  Covenantor shall not without the prior written consent of the
                  Purchaser (not to be unreasonably withheld or delayed)
                  transmit any communication (written or otherwise) to the
                  Inland Revenue or other relevant taxation authority or agree
                  any matter with the Inland Revenue or other relevant taxation
                  authority.

         10.4.    The Purchaser shall procure that a Group Company affords such
                  access to its books, accounts and records as is necessary and
                  reasonable to enable the Covenantor or its duly authorised
                  agents to prepare the tax returns and computations of a Group
                  Company for all accounting periods ended on or before the
                  Accounts Date and conduct matters relating to them in
                  accordance with this clause 9.

         10.5.    The Purchaser or its duly authorised agents shall prepare the
                  tax returns and computations of a Group Company for the
                  accounting period in which Completion falls, subject to all
                  such computations and replies to enquires from the Inland
                  Revenue or other relevant taxation authority being submitted
                  in draft form to the Covenantor for comment, and the Purchaser
                  or its duly authorised agents shall not unreasonably refuse to
                  adopt such comments.

11.      The provisions of clause 11 (Assignment), clause 13 (Entire Agreement),
         clause 14 (Waiver, Amendment), clause 16 (Payments), clause 18
         (Notice), clause 19 (Counterparts), clause 20 (Governing Law and
         Submission to Jurisdiction) clause 21 (Invalidity) , and Schedule 6 of
         the Share Purchase Agreement (to the extent expressly so stated
         therein) shall apply to this Deed as if the same were incorporated in
         this Deed.

12.      Payments to the Purchaser under this Deed, excluding any amounts the
         Purchaser repays to the Covenantor under this Deed, shall be treated
         for all purposes as a reduction in the purchase price of the Shares
         paid pursuant to the Share Purchase Agreement.




                                      -74-
<PAGE>   78




IN WITNESS whereof the parties hereto have duly executed this Deed the day and
year first before written.

EXECUTED AS A                                    )
DEED BY                                          ) ___________________
C.I. LAW TRUSTEES LIMITED                        ) Director
acting by                                        )
                                                   ___________________
                                                   Director/Secretary






EXECUTED as a                                    )
DEED BY                                          )
AETHER SYSTEMS, INC.                             )




                                      -75-
<PAGE>   79



                                   SCHEDULE 5

                                 THE PROPERTIES



1.       Lessor:           EjendomsSelskabet Narden A/S



         Lessee:           IFX Scandinavia ApS



         Premises:         Bredgade 20 (rear premises)
                           2nd Floor
                           DK-1260 Copenhagen K





2.       Lessor:           Gamla Livforsakringgsaktiebolaget SEB Trygg Liv



         Lessee:           IFX Scandinavia Aps



         Premises:         Kungsgatan 24, Stockholm



3.       Lessor:           A/S Kongensgate 7



         Lessee:           The Association of Norwegian Stockbroking
                           Companies

                           (IFX Scandinavia ApS)

         Premises:         Two of the following Rooms 501, 502, 503, 504, 505,
                           506, 515, 516 and 517 Kongensgate 7



4.       Lessor:           Menta Real Estate Ltd



         Lessee:           IFX Scandinavia ApS,





                                      -76-
<PAGE>   80

         Premises:         Room 439, 4th Floorm, World Trade Centre, Helsinki,
                           AlekSanterinkatu 17


5.       Lessor:           Otto Lenz



         Lessee:           IFX Deutschland GmbH



         Premises:         App. 101, Schillerstra(beta)e 18, Frankfurt M



6.       Lessor:           Regus Amsterdam B.V.



         Lessee:           IFX Scandinavian



         Premises:         Hoorgoorddreef 9, 1101 BA, Amsterdam SE



7.       Lessor:           Modesto Saiz Gabaldon



         Lessee:           IFX Finanzas Espana SA



         Premises:         No. 48 Calle Capitan Hoya, Madrid



8.       Lessor:           SCI



         Lessee:           IFX France S.A.R.L.



         Premises:         5th Floor, 9 Rue du Chateau d'Eau, 75010 Paris





                                      -77-
<PAGE>   81

9.       Lessor:           Bruno Emanuel Lages Serejo



         Lessee:           IFX Finanzos S.A. - Branch in Portugal



         Premises:         3rd Floor, B, Rua de Viriato No. 27, Lisbon



10.      Lessor:           Golden Shoe Holdings (Pte) Ltd



         Lessee:           Intext [IFX] Pte Ltd



         Premises:         15 Phillip Street #08-00, Tan Ean Kiam Building,
                           Singapore 048694




                                      -78-
<PAGE>   82



                                   SCHEDULE 6

                            LIMITATIONS OF LIABILITY


1.       APPLICABILITY OF THIS SCHEDULE

         The provisions of this Schedule shall apply with respect to the
         Warranties and (only to the extent expressly so stated in this
         Schedule) to the other provisions of this Agreement and to the Tax Deed
         (in addition to the limitations (if any) set out in those documents
         respectively).

2.       WARRANTIES

         Notwithstanding anything in this Agreement to the contrary, the
         provisions of this Schedule shall operate to limit the liability of
         CILT in respect of any claim under the Warranties by the Purchaser (a
         "Warranty Claim").

3.       LIMITATIONS OF LIABILITY UNDER THE WARRANTIES AND THE TAX DEED

         3.1.     Limitation on quantum:

                  3.1.1.   Save in the event of fraud on the part of CILT:

                           a)       The total liability of CILT under or
                                    pursuant to this Agreement (whether for
                                    breach of the Warranties (other than the Tax
                                    Warranties and the Tax Deed) shall not
                                    exceed the lesser of:-

                                    (1)      US$17,000,000; and

                                    (2)      after the first anniversary of
                                             Completion, US$8,500,000 plus a sum
                                             equal to any liability of CILT in
                                             respect of any such claims notified
                                             in accordance with paragraph C2 by
                                             the Purchaser to CILT on or prior
                                             to the first anniversary of
                                             Completion.

                           b)       The total liability of CILT under or
                                    pursuant to the Tax Warranties and the Tax
                                    Deed shall not exceed US$8,500,000.

                           c)       CILT shall not be liable in respect of any
                                    individual claim under the Warranties (other
                                    than Warranties C1(b) and D7 or the Tax
                                    Warranties) unless (and then only to the
                                    extent that) the amount that would otherwise
                                    be recoverable from CILT in respect of such
                                    claim exceeds US$20,000. For the avoidance
                                    of doubt, amounts for which the CILT has no
                                    liability, or by which the CILT's liability
                                    is reduced as a consequence of the operation
                                    of this clause shall not be capable of
                                    constituting a claim



                                      -79-
<PAGE>   83

                                    or increasing the amount thereof for the
                                    purpose of paragraph 3.1.1(d).

                           d)       CILT shall not be liable in respect of any
                                    claim or claims under the Warranties other
                                    than the Tax Warranties unless and until
                                    (and then in respect of all such claims) the
                                    aggregate amount that would otherwise be
                                    recoverable from CILT in respect of all such
                                    claims (after disregarding such part of such
                                    claims as is necessary to comply with
                                    paragraph 3.1.1(c) shall exceed US$250,000.

                           e)       CILT shall not be liable in respect of any
                                    claim or claims under the Tax Warranties or
                                    the Tax Deed unless and until (and then in
                                    respect of all such claims) the aggregate
                                    amount that would otherwise be recoverable
                                    from CILT in respect of all such claims
                                    shall exceed US$75,000

                  3.1.2.   For the purpose of paragraph 3.1.1, where a claim
                           relates to more than one event, circumstance, act or
                           omission which event, circumstance, act or omission
                           would separately constitute a breach of or give rise
                           to a Warranty Claim or a claim under the Tax Deed,
                           such claim shall be treated as a separate claim in
                           respect of each such event, circumstance, act or
                           omission.

                  3.1.3.   The amount of any claim(s) under the Warranties in
                           respect of any particular matter or circumstance
                           shall be counted only once, so that the Purchaser
                           shall not be entitled to aggregate any claims which
                           it may make (or be entitled to make) under this
                           Agreement and/or the Tax Deed.

                  3.1.4.   Nothing in this Schedule shall in any way restrict or
                           limit the general obligation of the Purchaser to
                           mitigate any loss or damage which it may suffer in
                           consequence of any breach by CILT of the Warranties.

                  3.1.5.   the avoidance of doubt, in determining the amount of
                           any claim for the purposes of the limits set out in
                           this Schedule, the amount of such claim shall be the
                           net amount after giving effect to all the provisions
                           of this Schedule.

         3.2.     Time limits for bringing claim:

                  No claim shall be brought against CILT in respect of any
                  breach of the Warranties or the Tax Deed unless the Purchaser
                  shall have given to CILT written notice of such claim
                  specifying (in reasonable detail) the matter which gives rise
                  to the breach or claim, the nature of the breach or claim and
                  the Purchaser's good faith estimate of the amount claimed in
                  respect thereof on or before the date of the second
                  anniversary of Completion;



                                      -80-
<PAGE>   84

                  PROVIDED that the liability of CILT under this sub-paragraph
                  shall absolutely determine (if such claim has not been
                  previously satisfied, settled or withdrawn) if legal
                  proceedings in respect of such claim shall not have been
                  commenced within six months of the service of such notice and
                  for this purpose proceedings shall not be deemed to have been
                  commenced unless they shall have been properly issued and
                  validly served upon CILT.

         3.3.     Conduct of litigation:

                  3.3.1.   If the Purchaser considers that it will or may make a
                           claim against CILT for breach of Warranty, it shall
                           as soon as practicable notify CILT in writing, giving
                           such particulars thereof as are then available, and
                           for a period of 30 days after such notification shall
                           afford CILT the opportunity to take steps to remedy
                           the matter giving rise to such claim. To the extent
                           that the matter giving rise to such claim is remedied
                           within such 30 days period, the Purchaser shall not
                           be entitled to any compensation in respect thereof.

                  3.3.2.   Upon the Purchaser becoming aware of any claim,
                           action or demand against it or matter likely to give
                           rise to any of these in respect of the Warranties,
                           the Purchaser shall, subject to paragraph 15 of this
                           Schedule:-

                           a)       forthwith notify CILT by written notice as
                                    soon as it appears to the Purchaser that any
                                    assessment or claim of a third party
                                    received by or coming to the notice of the
                                    Purchaser may result in a claim under the
                                    Warranties;

                           b)       take such action and give such information
                                    and access to personnel, premises, chattels,
                                    documents and records to CILT and its
                                    professional advisers as CILT may reasonably
                                    request;

                           c)       at the request of CILT, allow CILT, at
                                    CILT's sole expense, to take the sole
                                    conduct of such actions as CILT may deem
                                    appropriate in connection with any such
                                    assessment or claim in the name of the
                                    Purchaser and in that connection the
                                    Purchaser shall, upon receiving such
                                    security for its costs as the Purchaser may
                                    reasonably request, give or cause to be
                                    given to CILT such assistance as CILT may
                                    reasonably require in avoiding, disputing,
                                    resisting, settling, compromises, defending
                                    or appealing any such claim and shall
                                    instruct such solicitors or other
                                    professional advisers as CILT may (with the
                                    Purchaser's consent, such consent not to be
                                    unreasonably withheld) nominate to act on
                                    behalf of the Purchaser, as appropriate, but
                                    to act in accordance with CILT's sole
                                    instructions; or



                                      -81-
<PAGE>   85

                           d)       make no admission of liability, agreement,
                                    settlement or compromise with any third
                                    party in relation to any such claim or
                                    adjudication without the prior written
                                    consent of CILT.

                  3.3.3.   In any event, CILT shall be entitled at any stage and
                           at their sole discretion to settle any such third
                           party assessment or claim and shall notify any such
                           decision to settle such assessment or claim to the
                           Purchaser as soon as practicable thereafter.

4.       Acts of the Purchaser:

         No claim shall lie against CILT under the Warranties if such claim is
         wholly or partly attributable to:-

         4.1.     any voluntary act, omission, transaction or arrangement
                  carried out at the written request of or with the written
                  consent of the Purchaser before Completion;

         4.2.     any voluntary act, omission, transaction or arrangement
                  outside the ordinary course of business carried out by the
                  Purchaser or on its behalf or by persons deriving title from
                  the Purchaser under this Agreement on or after Completion;

         4.3.     any admission of liability made without CILT's consent after
                  the date hereof by the Purchaser or on its behalf or by
                  persons deriving title from the Purchaser under this Agreement
                  on or after Completion;

         4.4.     directly or indirectly the cessation of any business carried
                  on by the Company or the Purchaser or any holding company or
                  subsidiary of the Purchaser or any subsidiary of the holding
                  company or the Purchaser (the Purchaser's Group) following
                  Completion.

5.       Allowance, provision or reserve in the Accounts and/or the Management
         Accounts:

         No matter shall be the subject of a claim for breach of any of the
         Warranties to the extent that allowance, provision or reserve in
         respect of such matter shall have been made in the Accounts and/or the
         Management Accounts or has been included in calculating creditors or
         deducted in calculating debtors in the Accounts and/or the Management
         Accounts or shall have been otherwise taken account of in calculating
         any sum or sums shown in the Accounts and/or the Management Accounts.

6.       Recovery from third parties:

         Subject to paragraph 15 of this Schedule,

         6.1.     In the event that the Purchaser shall recover any amount from
                  some other person any sum in respect of any matter giving rise
                  to a claim under the Warranties, the amount of the claim
                  against CILT shall be reduced by the



                                      -82-
<PAGE>   86

                  amount recovered, less all reasonable costs, charges and
                  expenses incurred by the Purchaser recovering that sum from
                  such other person.

         6.2.     If CILT pays at any time to the Purchaser an amount pursuant
                  to a claim in respect of the Warranties and the Purchaser
                  subsequently recovers from some other person any sum in
                  respect of any matter giving rise to such claim, the Purchaser
                  shall forthwith repay to CILT so much of the amount paid to
                  the Purchaser as does not exceed the sum recovered from such
                  other person less all reasonable costs, charges and expenses
                  incurred by the Purchaser in recovering that sum from such
                  other person.

7.       Retrospective legislation:

         No liability shall arise in respect of any breach of any of the
         Warranties to the extent that liability for such breach occurs or is
         increased wholly or partly as a result of any legislation not in force
         at the date hereof which takes effectively retrospectively.

8.       Taxation:

         8.1.     CILT shall have no liability in respect of a Warranty Claim if
                  such breach or claim would not have occurred or arisen but for
                  any change in the basis of, method of calculation of, or
                  increase in the rate or rates of taxation or changes in the
                  practice of the Inland Revenue made or coming into effect
                  after the date hereof or the withdrawal after the date hereof
                  of any extra-statutory concession currently granted by any tax
                  authority.

         8.2.     CILT shall have no liability in respect of a Warranty Claim to
                  the extent that such claim, or the subject matter thereof
                  occurs or arises, or such claim otherwise has arisen, or is
                  increased as a result of any change made after the date hereof
                  in any accounting or taxation policies or practice of the
                  Company, the Purchaser or the Purchaser's Group.

         8.3.     If any specific provision or reserve for Taxation shall at the
                  date of any payment required to be made by CILT have proved to
                  have been an over-provision or over-reserve the amount of such
                  over-provision or over-reserve shall be set off against any
                  actual liability of CILT in respect of any claim(s) for breach
                  of the Warranties.

9.       No liability for contingent or non-quantifiable claims:

         If any breach of the Warranties arises by reason of some liability
         which, at the time such breach or claim is notified to CILT, is
         contingent only or otherwise not capable of being quantified, then CILT
         shall not be under any obligation to make any payment in respect of
         such breach or claim unless and until such liability ceases to be
         contingent or becomes capable of being quantified, as the case may be.
         So long as such claim shall have been notified to CILT in accordance
         with paragraph 2 above, as appropriate, then the proviso to the
         relevant paragraph shall be amended in relation to such claim so as to
         require that legal proceedings be commenced within six months from the
         date on which the said liability ceases to be contingent or becomes
         capable of being quantified, as the case may be, in order for the
         liability of CILT not to determine.



                                      -83-
<PAGE>   87

10.      Information of the Purchaser:

         The Purchaser acknowledges and declares that in entering into this
         agreement it has not relied and is not relying on any warranties,
         representations, covenants, undertakings, indemnities, promises,
         forecast or other statements whatsoever whether written or oral (and
         whether implied or otherwise) (collectively "Representations"), other
         than those expressly set out in this Agreement and in the Tax Deed, and
         the Purchaser hereby irrevocably and unconditionally waives any right
         it may have to claim damage for, or to rescind this agreement by reason
         of, any Representation not expressly set out or referred to in this
         Agreement or the Tax Deed unless such representation was made
         fraudulently.

11.      Payment of claim to be reduction in purchase price:

         Any payment made by CILT in respect of any claim under the Warranties
         or the Tax Deed shall be deemed to be a reduction in that total
         consideration payable under this Agreement.

12.      Insurance:

         No claim shall lie against CILT under the Warranties to the extent such
         claim is recoverable by the Purchaser or the Company or any member of
         the Purchaser's Group under the terms of any insurance policy of the
         Purchaser or the Company or any member of the Purchaser's Group (or
         would have been so recoverable but for any change in the terms of any
         such policy after Completion).

13.      Rescission:

         Save in the event of fraud, no right of rescission shall be available
         after Completion to the Purchaser by reason of any breach of the
         Warranties or any other provision of this Agreement or the Tax Deed.

14.      Trustee's Liability:

         Without prejudice to the foregoing the liability of the Trustee for all
         and any claims under this Agreement and/or the Tax Deed shall not
         exceed the value for the time being of the Trust Assets less an amount
         equal to the Trustee's bona fide estimate of any Permitted Tax
         Liability or Permitted Trust Liability properly payable out of the
         Trust Assets.

15.      No prejudice to Business:

         Nothing in paragraphs 3 or 6 of this Schedule shall require the
         Purchaser to do or omit to do any act or thing which would or may, in
         the Purchaser's judgment, prejudice the business or interests of the
         Company or any member of the Purchasers' Group and which would not be
         required of the Purchaser to discharge its common law duty to mitigate
         loss.




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