CONCENTRIC NETWORK CORP
8-K, 2000-02-14
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>

                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549

                                   FORM 8-K

                                CURRENT REPORT


Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) January 28, 2000.
                                                 ----------------

                        CONCENTRIC NETWORK CORPORATION
      -------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)


               Delaware                       000-22575           65-0257497
      -----------------------------------------------------------------------
        (State or other jurisdiction         (Commission        (IRS Employer
            of incorporation)               File Number)     Identification No.)


               1400 Parkmoor Avenue, San Jose, California 95126
               ------------------------------------------------
             (Address of principal executive offices)     (Zip Code)


       Registrant's telephone number, including area code (408) 817-2800
                                                          --------------



                                      N/A
      ------------------------------------------------------------------
         (Former name or former address, if changed since last report)
<PAGE>

     Item 2.  ACQUISITION OR DISPOSITION OF ASSETS

     On January 28, 2000 (the "Effective Date"), Concentric Network Corporation
(the "Registrant"), acquired all of the outstanding capital stock of Internet
Technology Group ("ITG"), a public liability company organized under the laws of
Scotland (the "Acquisition"), pursuant to a Scheme of Arrangement (the "Scheme
of Arrangement") dated September 7, 1999, by and among Registrant and ITG. As a
result of the Acquisition, ITG became a wholly owned subsidiary of Registrant on
the Effective Date.

     Pursuant to the Scheme of Arrangement and on the Effective Date, Registrant
paid 71,427,189 British Pounds, which is approximately U.S. $115,354,910 in cash
and issued 4,728,130 shares of its common stock in consideration for all of the
issued and outstanding shares of capital stock of ITG.  In addition, the
Registrant issued an additional 102,500 shares of its common stock as
consideration for shares of capital stock of ITG issued upon exercise of
outstanding ITG options at the closing. The Registrant funded the cash
portion of the consideration from its working capital.

     The description contained in this Item 2 of the transactions contemplated
by the Scheme of Arrangement is qualified in its entirety by reference to the
full text of the Implementation a copy of which is attached hereto as
Exhibit 2.1.

Item 7.    FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND
           EXHIBITS

     (a)   FINANCIAL STATEMENTS

     The Registrant will provide the financial statements required by paragraph
(a) of Item 7 of Form 8-K promulgated by the Commission pursuant to the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), if any such
information is required, within 60 days of the date that this initial report on
Form 8-K must be filed with the Commission.

     (b)   PRO FORMA FINANCIAL INFORMATION

     The Registrant will provide the pro forma financial information required by
paragraph (b) of Item 7 of Form 8-K promulgated by the Commission pursuant to
the Exchange Act, if any such pro forma financial information is required,
within 60 days of the date that this initial report on Form 8-K must be filed
with the Commission.

     (c)   EXHIBITS.

           2.1   Implementation Agreement dated September 7, 1999.

           99.1  Press Release dated January 28, 2000.
<PAGE>

SIGNATURE


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

                                    CONCENTRIC NETWORK CORPORATION


                                      /s/ Michael F. Anthofer
                                    --------------------------------------
                                    Michael F. Anthofer
                                    Senior Vice President, Chief Financial
                                    Officer

                                    Date: February 14, 2000
<PAGE>

                        CONCENTRIC NETWORK CORPORATION

                          Current Report on Form 8-K

                               INDEX TO EXHIBITS


Exhibit No.          Description
- ----------           -----------

2.1                 Implementation Agreement dated September 7, 1999.

99.1                Press Release dated January 28, 2000.

<PAGE>

                                                                   EXHIBIT 2.1

                                                                  CONFORMED COPY
                                                                  --------------


                           DATED 7th September, 1999


                         INTERNET TECHNOLOGY GROUP PLC

                                      and

                         CONCENTRIC NETWORK CORPORATION

                                      and

                                  RED WAVE PLC

                                      and

                                   JAN MURRAY

                                      and

                               LAURENCE BLACKALL

                                      and

                       THE MONUMENT TRUST COMPANY LIMITED

                    ______________________________________

                            IMPLEMENTATION AGREEMENT

                    ______________________________________



                               Slaughter and May

                              35 Basinghall Street

                                London EC2V  5DB

                                   (JCXT/RRO)
<PAGE>

                                    CONTENTS

<TABLE>
<CAPTION>
                                                                   Page
<S>                                                                 <C>
1. INTERPRETATION                                                    2

2. DOCUMENTATION                                                     7

3. THE SCHEME                                                        9

4. SALE AND PURCHASE                                                11

5. CONDITIONS                                                       11

6. CONSIDERATION AND COMPLETION                                     12

7. TAX COVENANT                                                     15

8. WITHHOLDINGS                                                     17

9. GUARANTEE                                                        17

10. CONDUCT OF BUSINESS                                             18

11. THE OFFER AND THE RED WAVE OFFER                                21

12. REPRESENTATIONS, WARRANTIES AND UNDERTAKINGS                    22

13. TERMINATION                                                     26

14. FURTHER ASSURANCE                                               27

15. ANNOUNCEMENTS                                                   27

16. CONFIDENTIALITY                                                 28

17. COSTS AND EXPENSES                                              29

18. EFFECT OF COMPLETION                                            29

19. ASSIGNMENT                                                      29

20. NOTICES                                                         29

21. COUNTERPARTS                                                    30

22. TIME OF ESSENCE                                                 30

23. INVALIDITY                                                      30
</TABLE>
<PAGE>

<TABLE>
<S>                                                                 <C>
24. CHOICE OF GOVERNING LAW                                         30

25. JURISDICTION                                                    31

SCHEDULE 1 (PRESS ANNOUNCEMENT)                                     34

SCHEDULE 2 (IRREVOCABLE VOTING UNDERTAKINGS)                        35

SCHEDULE 3 (COMPLETION ARRANGEMENTS)                                37

SCHEDULE 4 (DEED OF NOVATION)                                       39

SCHEDULE 5 (SEQUENCE OF EVENTS)                                     42
</TABLE>
<PAGE>

THIS IMPLEMENTATION AGREEMENT is made 7th September 1999

BETWEEN:

1.   Internet Technology Group plc (the "Company") (incorporated in Scotland
     under no. 115367) of 24 Great King Street, Edinburgh, Lothian; and

2.   Concentric Network Corporation (a corporation incorporated in the State of
     Delaware Federal ID No. 65-0257497 of 1400 Parkmoor Avenue, San Jose,
     California 95126, United States of America (the "Offeror"); and

3.   Red Wave plc (a company registered in England and Wales under no. 3838649)
     of Kempson House, Camomile Street, London EC3A 7AN (the "Purchaser");

4.   Jan Murray of 92 Rue Vautier, Fort George, Saint Peter Port, Guernsey GY1
     2SR and Laurence Blackall of 26 Spencer Walk, London SW15 1PL (each a
     "Nominated Director"); and

5.   The Monument Trust Company Limited of 14 New Street, Saint Peter Port,
     Guernsey (the "Trustee").

WHEREAS:

(A)  The Company is the owner, directly or indirectly, of the Non-ISP Interests
     as well as certain other businesses and the Purchaser has agreed to
     purchase the Non-ISP Interests on the terms and subject to the conditions
     of this agreement.

(B)  The Purchaser was incorporated on 6th September, 1999 and is owned as to
     100 per cent. of its issued share capital of 1,250,000 ordinary shares of 1
     pence each by the Trustee.

(C)  The Nominated Directors have agreed to guarantee the obligations of the
     Purchaser hereunder and to provide certain further undertakings as set out
     herein.

(D)  The Trustee is the owner of the entire issued share capital of Global
     Internet Corporation (registered in the Island of Nevis under number 4680)
     ("GIC"). GIC is the registered owner of 14,975,605 ITG Shares. The
     beneficiaries of the Trust are Jan Murray and his family. The Trustee has
     entered into this agreement in order to give certain undertakings in its
     capacity as trustee of the Trust.

(E)  The Company has informed the Offeror of certain funding requirements to
     meet committed expenditures (and in respect of which the Company does not
     have committed funding) and the Offeror has in reliance, inter alia, on the
<PAGE>

     various undertakings of the Company set out in this agreement agreed to
     provide the Loan in advance of the Scheme becoming effective.

(F)  In reliance on the undertakings of the Nominated Directors, the Trustee,
     the Purchaser and the Company (without which the Offeror would not proceed
     with the Offer), the Offeror intends to make a takeover offer for the
     Company to be implemented by way of, and the Company has agreed to
     implement, a scheme of arrangement of the Company, substantially on the
     terms and subject to the pre-conditions and conditions set out in the Press
     Announcement.

(G)  Prior to entry into this agreement, Bear, Stearns International, financial
     adviser to the Offeror has confirmed to the Company that it will be able to
     provide the confirmation as to the availability of cash to the Offeror
     required by Rule 24.7 of the City Code.

(H)  Prior to the date of this agreement all of the holdings of Allerby of
     Redstone Shares have been transferred to the Company, the resulting charge
     to stamp duty (if any) has been paid and the transfer has been lodged with
     Redstone Telecom for registration of the transfers.

(I)  It is the intention of the parties that this document be executed as a
     deed.

WHEREBY IT IS AGREED as follows:

1.    Interpretation

1.1   In this agreement (but not in Schedules 1, 2 and 4) unless the context
otherwise requires:

"Actions"                     any action, suit, claim, or proceedings, whether
                              civil, criminal, administrative or regulatory;

"Agents"                      means, in relation to a relevant person, that
                              person's directors, officers, employees, advisers
                              and representatives;

"Aggregate Additional         means the aggregate amount of the Additional Cash
Cash Payment"                 Payments that is made or which may fall to be made
                              to ITG Shareholders and Warrantholders pursuant to
                              the terms of the Offer, the Warrant Proposals and,
                              if relevant, any proposals to be made to holders
                              of options issued pursuant to the terms of the ITG
                              Share Option Schemes;
<PAGE>

"Allerby"                     means Allerby Investments Holdings Limited, a
                              wholly owned subsidiary of the Company
                              incorporated in Guernsey;

"Base Value"                  means 50 pence per Redstone Share held by ITG and
                              38 pence per Redstone Share held by Ballynatray at
                              the Effective Date;

"Completion"                  means payment of the Consideration by the
                              Purchaser to the Company in accordance with the
                              terms of this agreement which shall be deemed to
                              have occurred to the extent of the Shareholder
                              Retained Amount and the Nominated Directors'
                              Retained Amount without more upon the Scheme
                              becoming effective;

"Conditions"                  the conditions set out in clause 5.1 and
                              "Condition" shall be construed accordingly;

"Consideration"               has the meaning given in clause 6.1;

"Costs"                       damages, liabilities, losses, compensation, costs
                              and expenses;

"Court"                       the Court of Session in Edinburgh;

"Court Meeting"               means any meeting or meetings convened by the
                              Court as referred to in clause 3.2;

"Deed of Novation"            a deed of novation substantially in the form set
                              out in schedule 4;

"Effective Date"              the date upon which the Scheme becomes effective
                              in accordance with section 425 of the Companies
                              Act 1985 following filing of the Order with the
                              Registrar;

"Escrow Completion"           shall mean completion of the sale and purchase of
                              the Non-ISP Interests in accordance with the terms
                              of this agreement subject to the Escrow Condition;

"Escrow Completion Date"      means the business day prior to the Hearing Date;

"Escrow Condition"            means that the steps taken towards, and the
                              documents delivered for the purposes of,
                              completing the sale and purchase of the Non-ISP
                              Interests are taken and/or delivered subject only
                              to the condition that if the Scheme
<PAGE>

                                   has not become effective by filing of the
                                   Order with the Registrar within 15 days after
                                   the Escrow Completion Date, those steps shall
                                   be deemed not to have been taken and all
                                   documents shall be returned and deemed never
                                   to have been delivered;

"Extraordinary General Meeting"    has the meaning given in clause 3.4;

"FSA"                              Financial Services Act 1986;

"Global Wave Debts"                the amounts (as determined from the books and
                                   records of the Company) outstanding as at the
                                   Effective Date and owed to the Company by
                                   Global Wave Limited pursuant to the
                                   agreements dated 16th July, 1997 between the
                                   Company and Wave ITG Limited;

"Hearing"                          the final hearing of the Scheme by the Court
                                   at which the Order is granted;

"Hearing Date"                     the date upon which the Hearing takes place;

"Loan"                             the advance or advances to be made pursuant
                                   to the Loan Agreement;

"Loan Agreement"                   the note purchase agreement and the secured
                                   promissory note in the form agreed between
                                   the Offeror and the Company and initialled
                                   for the purposes of identification by or on
                                   behalf of the Offeror and the Company;

"Loan Documents"                   the Loan Agreement and the Security
                                   Documents;

"Longstop Date"                    31st October, 1999 or such later date as the
                                   Offeror and the Company may, if required,
                                   with the leave of the Court, agree;

"Meetings"                         the court convened, and the extraordinary
                                   general, meetings of ITG Shareholders and
                                   Warrantholders for the purposes of approving
                                   the Scheme and the Warrant Proposals;

"Red Wave Offer"                   the offer to be made by Red Wave to ITG
                                   Shareholders and Warrantholders of rights to
                                   subscribe for Red Wave Shares, to the extent
                                   of their entitlement to Additional Cash
                                   Payments and, save to the extent of any
                                   existing holding of the Nominated Directors
                                   or the Trustee in Red
<PAGE>

                                  Wave, pro rata to their holdings, or to their
                                  subscription rights in respect of shares, in
                                  the Company;

"Nominated Directors' Retained     has the meaning given in clause 11.5;
 Amount"
"Offer Consideration"              the new Concentric Shares and cash payable to
                                   ITG Shareholders and Warrantholders as
                                   described in the Press Announcement;

"POS Regs"                         Public Offers of Securities Regulations 1995,
                                   as amended;

"Posting Date"                     the date upon which the Scheme Document is
                                   posted to ITG Shareholders and
                                   Warrantholders;

"Pre-emption Rights"               the pre-emption rights in favour of
                                   shareholders in Redstone Telecom set out in
                                   article 4 of the articles of association of
                                   Redstone Telecom;

"Press Announcement"               means the draft press announcement attached
                                   hereto in Schedule 1;

"Prospectus"                       the prospectus to be prepared by the
                                   Purchaser in respect of the Red Wave Shares
                                   and the Non-ISP Interests and making the Red
                                   Wave Offer, drawn up in compliance with the
                                   POS Regs, referred to in clause 2.1(i);

"Redstone Articles"                the articles of association of Redstone
                                   Telecom;

"Redstone Shares"                  the 2,725,344 ordinary shares of 10p in
                                   Redstone Telecom held by the Company and
                                   Ballynatray or, if applicable, such lesser
                                   number of ordinary shares in Redstone Telecom
                                   held by the Company and Ballynatray at the
                                   Effective Date;

"Redstone Telecom"                 Redstone Telecom plc

"Registrar"                        The Registrar of Companies for Scotland;

"Security Documents"               means the first fixed charge over the Non-ISP
                                   Interests and the second fixed and floating
                                   charge over the assets and undertaking of the
                                   Company in the agreed form initialled for the
                                   purposes of identification by or on behalf of
                                   the Offeror and the Company;
<PAGE>

"Scheme"                           the scheme of arrangement of the Company
                                   described in the Press Announcement and this
                                   agreement and to be implemented pursuant to
                                   section 425 of the Companies Act 1985;

"Sequence of Events"               the sequence of events set out in Schedule 5;

"Shareholder Retained Amount"      has the meaning given in clause 11.4;

"Tax"                              means:

                                   (a)  within the United Kingdom, corporation
                                        tax, advance corporation tax, income tax
                                        (including income tax required to be
                                        deducted or withheld from or accounted
                                        for in respect of any payment), capital
                                        gains tax, development land tax, capital
                                        transfer tax, inheritance tax, value
                                        added tax, national insurance
                                        contributions, capital duty, stamp duty
                                        reserve tax, duties of customs and
                                        excise, any liability arising under
                                        section 601 of the Income and
                                        Corporation Taxes Act 1988, and any
                                        other taxes, levies, duties, charges,
                                        imposts or withholdings corresponding
                                        to, similar to, replaced by or replacing
                                        any of them, together with all
                                        penalties, charges and interest relating
                                        to any of them or to any failure to file
                                        any return required for the purposes of
                                        any of them; and

                                   (b)  outside the United Kingdom, all taxes,
                                        levies, duties, imposts, charges and
                                        withholdings of any nature whatsoever,
                                        including (without limitation) taxes on
                                        gross or net income, profits or gains
                                        and taxes on receipts, sales, use,
                                        occupation, franchise, value added and
                                        personal property, together with all
                                        penalties, charges and interest relating
                                        to any of them;

"Tax Authority"                   means any taxing or other authority (whether
                                  within or outside the United Kingdom)
                                  competent to impose any Tax Liability;

"Tax Liability"                   means a liability to make actual payments of
                                  Tax (or amounts in respect of Tax); and
<PAGE>

"Trust"                           the Jan Murray-Obodynski Trust established by
                                  declaration of trust dated 18th March, 1991.

1.2  Terms used but not defined expressly herein shall, unless the context
     otherwise requires, have the meaning given to them in the Press
     Announcement.

1.3  Obligations or undertakings set out in this agreement on the part of the
     Trustee shall, wherever the context so permits, be deemed to include an
     obligation or undertaking on the part of the Trustee to procure that GIC
     does whatever is necessary to fulfil the relevant obligations or
     undertaking and, wherever the context so permits, the agreement of the
     Trustee shall be construed as the agreement of the Trustee and of GIC.

2.   Documentation

2.1  (i)   As soon as practicable following the date of this agreement:

           (a)  the Purchaser shall commence preparation of a Prospectus in
                relation to the Red Wave Shares and the Non-ISP Interests on the
                basis that it will acquire the Non-ISP Interests for cash on the
                terms of this agreement. The Prospectus shall include a
                statement to the effect that the Purchaser and/or its directors
                accept responsibility for the Prospectus and, if required by the
                Offeror, a disclaimer of responsibility for the Prospectus on
                the part of the Offeror and its Agents. The Purchaser shall
                instruct and retain appropriate professional advisers and
                registrars for the purposes of the Prospectus and the Red Wave
                Offer, at its sole cost;

           (b)  the Company shall allow the Purchaser and its advisers all
                reasonable access to its Agents, books and records and all
                reasonable assistance (but at the Purchaser's sole cost) for the
                purposes of the preparation of the Prospectus; and

           (c)  the Company shall exercise the subscription rights attaching to
                the Wave Warrants in accordance with their terms.

     (ii)  As soon as practicable following the date of this agreement, the
           Company shall, in conjunction with the Offeror, commence preparation
           of the Scheme Document in relation to the Offer and the Warrant
           Proposals and for these purposes the Offeror and the Purchaser shall
           provide to the Company all reasonable assistance and information.

     (iii) The Company, the Offeror (with respect to the Scheme Document) and
           the Purchaser shall ensure that each of the Scheme Document and the
<PAGE>

       Prospectus is finalised in sufficient time in advance of the Longstop
       Date to permit application to the Court to be made for leave to convene
       shareholder meetings and for the Scheme Document to be posted prior to
       the Longstop Date together with the Prospectus.

(iv)   Without prejudice to sub-clauses (i), (ii) or (iii), each party
       undertakes to co-operate with and to consult with the others in good
       faith in the preparation and publication by it of all documents in
       connection with this agreement and the transactions contemplated by it
       and to provide the others with such information as may be reasonably
       necessary or desirable in connection with the publication of the various
       documents required to implement this agreement.

(v)    The Purchaser shall, promptly upon finalising the Prospectus and leave to
       convene the Court Meeting being granted to the Company, file the
       Prospectus with the Registrar of the Companies for England and Wales as
       required by the Regulation 4 of the POS Regs and make the Prospectus
       available to the public in the manner required by the POS Regs.

(vi)   Promptly following lodging of the Prospectus with the Registrar of
       Companies for England and Wales as described in sub-clause (v), the
       Purchaser shall make available to the Company sufficient number of
       printed copies of the Prospectus together, if appropriate, with
       accompanying forms of election for the purposes of the Red Wave Offer to
       enable the Company or its Agents to post the Prospectus to ITG
       Shareholders and Warrantholders on behalf of the Purchaser with the
       Scheme Document, relevant proxy forms and the Form of Election.

(vii)  The Purchaser represents, warrants and undertakes to the Offeror and the
       Company that the Prospectus, when finalised, will comply with the POS
       Regs, the FSA and all other applicable laws and regulations and the
       Purchaser shall indemnify and hold harmless the Offeror and the Company
       and each of their respective Agents (save the Nominated Directors) with
       respect to any inaccuracy or omission, or other failure so to comply, of
       the Prospectus and in respect of and against all Costs and Actions
       (including all Costs incurred in investigating, settling or defending any
       Actions incurred by the Offeror or the Company or any of such Agents)
       resulting from or arising in any way in respect of the Prospectus, the
       making of the Red Wave Offer or the arrangements with respect to the Non-
       ISP Interests contemplated by this agreement.

(viii) None of the Nominated Directors, the Trustee or the Purchaser shall have
       any Action against the Company, any member of the ITG Group, the Offeror,
       any member of the Concentric Group, or any of their respective Agents
       with respect to any Costs or Actions resulting from
<PAGE>

          or arising in any way in respect of the Prospectus, the making of the
          Red Wave Offer or the arrangements with respect to the Non-ISP
          Interests contemplated by this agreement or any information provided
          to the Purchaser by any person upon which the Purchaser may have
          relied in the preparation of the Prospectus, the making of the Red
          Wave Offer or such arrangements.

2.2  The Offeror and the Company shall enter into and execute the Loan Documents
     immediately following signature of this agreement.

3.   The Scheme

3.1  The parties undertake to implement the Scheme in accordance with, and
     subject to the terms and conditions of, the Press Announcement and, so far
     as possible, the Sequence of Events.

3.2  The following principal commercial terms will apply to the Scheme of
     Arrangement:

     (a)  In consideration for the payment of the Offer Consideration to ITG
          Shareholders and Warrantholders, the entire issued share capital of
          the Company, at the record date for the purpose of the Scheme, will be
          transferred to the Offeror.

     (b)  The Offeror will, if required, undertake to the Court to be bound by
          the terms of the Scheme insofar as it relates to the Offeror,
          including as to payment of the Offer Consideration.

     (c)  Each of the Nominated Directors and the Trustee undertakes to give its
          separate written approval to or (where counsel has advised the Company
          and the Offeror that it is permissible) to vote their ITG Shares
          (including those ITG Shares allotted to them following the exercise of
          their holdings of Warrants in the Company) in favour of the Scheme at
          the meeting(s) of ITG Shareholders to be convened by the Court to
          approve the Scheme (the "Court Meeting") or (where counsel has so
          advised the Company that the same is not permissible) to vote their
          Iguana Shares in favour of the Scheme at any separate class meeting of
          shareholders convened for that purpose or, in the event that counsel
          advises that no separate class meeting is required, to undertake to
          the Court to be bound by the Scheme.

3.3  The Company will, and the Nominated Directors and the Trustee shall use
     their respective best endeavours to procure that the Company will take or
     cause to be taken all such steps as are within their power and necessary to
     implement the Scheme in accordance with the Sequence of Events and, in
     particular, but without limitation:
<PAGE>

     (a)  the Company will apply to the Court for leave to convene the Court
          Meeting and file such documents as may be necessary in connection
          therewith;

     (b)  upon (i) the Court making the order necessary for the purpose of
          convening the Court Meeting, (ii) the necessary documents being
          settled with the Court, and (iii) such documents (insofar as required)
          being approved by the Alternative Investment Market team of the London
          Stock Exchange, the Company shall publish the requisite documents and
          thereafter publish and/or post such other documents and information as
          the Court or the Alternative Investment Market team of the London
          Stock Exchange may approve or require from time to time in connection
          with the due implementation of the Scheme;

     (c)  following the Court Meeting and the Extraordinary General Meetings (as
          defined below), assuming the necessary resolutions are passed, the
          Company shall seek the sanction of the Court to the Scheme at the
          Hearing; and

     (d)  as soon as practicable after the sanction of the Court of the Scheme
          at the Hearing, the Company shall cause an office copy of the Order to
          be filed with the Registrar.

3.4  The Company will convene an extraordinary general meeting of ITG
     Shareholders and the holders of the First Issue Warrants and the Third
     Issue Warrants ("Extraordinary General Meetings") to be held on the same
     date as the Court Meeting to confirm special or, in the case of the
     Warrants, extraordinary resolutions to approve, inter alia, the Scheme, the
     transfer of the entire issued share capital of the Company as at the record
     date for the Scheme to the Offeror, any alteration of the Company's
     articles of association considered appropriate for the purposes of
     implementing the Scheme and the Warrant Proposals and such other matters as
     may be agreed between the Company and the Offeror necessary or desirable
     for the purposes of implementing the Scheme.

3.5  Each of the Nominated Directors and the Trustee undertakes to vote their
     ITG Shares (including those ITG Shares allotted to them following the
     exercise of their holdings of Warrants in the Company) in favour of the
     special resolutions to be proposed at the Extraordinary General Meetings.

3.6  Notwithstanding clause 3.3(c) and (d), the Company shall not proceed to
     seek the sanction of the Court at the Hearing unless either Escrow
     Completion has taken place prior to 5.00 p.m. on the business day prior to
     the Hearing Date or, Escrow Completion not having taken place by such time,
     the Offeror serves notice on the Company requiring it to proceed with
     seeking the sanction of the Court at the Hearing. If the Offeror serves
     such notice then the rights and
<PAGE>

     obligations of the Purchaser and the Company in so far as they relate
     exclusively to the sale and purchase of the Non-ISP Interests and the Red
     Wave Offer shall terminate and any elections pursuant to the Red Wave Offer
     to subscribe Red Wave shares shall not be accepted but without prejudice to
     accrued rights and liabilities.

3.7  The Company agrees with the Offeror that it will give the notice required
     by paragraph 3.7 of the terms of issue of each of the First Issue Warrants,
     the Second Issue Warrants, the Third Issue Warrants and the Fourth Issue
     Warrants and as required by paragraph 2.2 of the terms of issue of the
     Fifth Issue Warrants promptly upon the conditions therefor being satisfied
     if, in each case, any such Warrants are outstanding at such time.

4.   Sale and Purchase

4.1  Subject to the terms and conditions of this agreement, the Company agrees
     to sell (or procure the sale of) and the Purchaser agrees to purchase the
     Non-ISP Interests for the Consideration.

4.2  The Non-ISP Interests shall be sold with limited title guarantee.

4.3  The Purchaser shall be entitled to exercise and enjoy all rights attached
     or accruing to the Non-ISP Interests in respect of periods commencing on or
     after Completion.

5.   Conditions

5.1  The obligations of the Company and the Purchaser pursuant to clause 4 are
     conditional upon:

     (i)   all conditions to the Scheme having been satisfied or, where
           permissible waived, save any condition thereto relating to Escrow
           Completion and/or Completion;

     (ii)  the Prospectus having been lodged with the Registrar of Companies in
           England and Wales in accordance with the POS Regs and posted to ITG
           Shareholders, Warrantholders and, if required, participants in the
           Iguana Share Option Schemes together with the Scheme Document by no
           later than the Longstop Date; and

     (iii) none of the Non-ISP Interests being subject to any encumbrance or
           restrictions on transfer.

5.2  Each of the parties agrees to use its best endeavours to procure (and the
     Nominated Directors and the Trustee shall use their respective best
     endeavours to procure that the Company and the Purchaser use their best
<PAGE>

     endeavours to procure) that Condition (ii) is fulfilled as soon as
     practicable after the date hereof and in any case by no later than the
     Longstop Date and that Condition (iii) is fulfilled as soon as practicable
     after the date hereof and in any case prior to the Escrow Completion Date.

5.3  Condition (iii) may be waived by agreement between the Company and the
     Offeror.

5.4  Each of the parties agrees that it will not, and the Nominated Directors
     and the Trustee agree that they will use their respective best endeavours
     to procure that the Purchaser and the Company will not, take or permit to
     be taken any action which is reasonably likely to impede or prevent the
     satisfaction of any of the Conditions.

5.5  To the extent that any of the Conditions have not been satisfied or, where
     permissible, waived by the dates referred to in clause 5.2, the rights and
     obligations of the Company and the Purchaser under this agreement insofar
     as they relate exclusively to the sale and purchase of the Non-ISP
     Interests and the making of the Red Wave Offer shall terminate (with the
     effect, inter alia, that neither Escrow Completion nor Completion will take
     place) but without prejudice to accrued rights and liabilities.

5.6  Where for any reason the rights and obligations of the Company and the
     Purchaser under this agreement with respect to the sale and purchase of the
     Non-ISP Interests are terminated, the Offeror may elect (in its absolute
     discretion) by serving notice in writing on the Company and the Purchaser:
     (i) not to proceed with the Offer in which case the Company shall not seek
     the sanction of the Court to the Scheme and this agreement, save for
     clauses 16,17, 20, 24 and 25 shall terminate but without prejudice to
     accrued rights and liabilities; or (ii) to proceed with the Offer, in which
     case the Company shall proceed to seek the sanction of the Court to the
     Scheme in accordance with clause 3.

5.7  Without prejudice to any other terms of this agreement, the obligations of
     the Company and the Offeror to effect the Scheme will be subject to the
     conditions and other terms set out in Appendix I to the Press Announcement.

6.   Consideration and Completion

6.1  Subject to clause 6.3, the Consideration payable by the Purchaser to the
     Company for the Non-ISP Interests shall be the aggregate of the following:

     (a)  (Pounds)4,422,298 with respect to the Wave Shares;

     (b)  the value of the Redstone Shares (including the Redstone Shares held
          by Ballynatray) which for this purpose shall be:
<PAGE>

          (i)  if, at the Effective Date, the Pre-emption Rights have been
               waived or the Redstone Articles have been validly amended so that
               in either case, the Redstone Shares are freely transferable or if
               the Redstone Shares are nevertheless transferable to Red Wave
               pursuant to article 4 of the Redstone Articles or if at the
               Effective Date the share capital of Redstone Telecom has been
               admitted to listing or trading or been quoted on a recognised
               investment exchange, (Pounds)1.50 per Redstone Share; or

          (ii) in any other circumstance, zero,

          provided that to the extent that any Redstone Shares held by the
          Company or Ballynatray at the date of this agreement have at the
          Effective Date been disposed of (or an unconditional agreement for
          their disposal has been entered into) by the Company or Ballynatray
          and the Company or Ballynatray has received (or is unconditionally
          entitled to receive) cash therefor, then the Consideration calculated
          in accordance with this sub-clause 6.1(b) shall be reduced in
          proportion to the number of Redstone Shares which are the subject of
          the disposal and increased by the relevant amount of cash received or
          receivable;

     (c)  (Pounds)76 (being the value agreed as payable by Red Wave to the
          Company in respect of the Global Wave Shares and the Ballynatray
          Shares, excluding the value of the Redstone Shares held by
          Ballynatray) plus an amount equal to the Global Wave Debts,

     and any amounts expressed in a currency other than sterling shall for these
     purposes be translated into sterling using the spot rate of exchange for
     the relevant currency at the close of business on the last business day
     prior to the Effective Date. Such aggregate amount shall be referred to in
     this agreement as the "Consideration". The Offeror shall procure that Bear,
     Stearns International shall certify the elements of the Consideration
     referred to above and the calculation of the Consideration. The Company
     shall supply to the Offeror for these purposes details of all disposals of
     Redstone Shares promptly after the disposal has been agreed and details of
     the Global Wave Debts, in each case certified by the finance director of
     the Company to be true and accurate. Bear, Stearns International shall be
     entitled to rely on these certificates. The certificate of Bear, Stearns
     International shall be final and binding as between the parties in the
     absence of manifest error. The Offeror shall announce the amount of the
     Aggregate Additional Cash Payment on the basis of the above as soon as
     practicable after the Scheme has become effective. For the avoidance of
     doubt, the Redstone Shares shall not be transferred to the Purchaser, shall
     not form part of the Non-ISP Interests and no value therefor shall be given
     in the calculation of the Consideration if, at the Effective Date, the Pre-
     emption Rights have not been waived, the Redstone Articles have not been
     validly amended so that the Redstone Shares are freely
<PAGE>

     transferable, the share capital of Redstone Telecom has not been admitted
     to listing or trading and is not quoted on a recognised investment exchange
     and the Redstone Shares have not become transferable to the Purchaser
     pursuant to article 4 of the Redstone Articles. In these circumstances, the
     Company undertakes to procure that Ballynatray executes a transfer of its
     legal interest in the Redstone Shares held by it to the Company prior to
     Escrow Completion.

6.2  In the event that the sale and purchase of the Non-ISP Interests pursuant
     to this agreement is terminated for any reason and the Scheme nonetheless
     becomes effective at the election of the Offeror, Concentric undertakes to
     use its best endeavours to dispose of its interest in the Wave Shares and
     (in the event that the Redstone Shares have been admitted to trading or
     listing or been quoted on a recognised investment exchange at the Effective
     Date) the Redstone Shares on or before the tenth business day following the
     Scheme becoming effective at the best price reasonably obtainable on the
     relevant day.

6.3  Subject to Escrow Completion having taken place and the Scheme becoming
     effective, the Consideration shall be payable in cash in sterling cleared
     funds and shall be paid by or on behalf of the Purchaser in the manner
     described in clauses 11.4 and 11.5 and otherwise in accordance with the
     directions of the Offeror. Receipt by the Company of the Shareholder
     Retained Amount and the Nominated Directors' Retained Amount shall
     discharge the obligation of the Purchaser to pay the Consideration to the
     extent of such receipt.

6.4  Immediately prior to Escrow Completion, the Offeror shall notify the
     Company and the Purchaser whether the conditions to the Scheme (save for
     any condition thereto relating to Escrow Completion or Completion) have
     been satisfied or waived. At Escrow Completion, the parties shall do those
     things ascribed to them in Schedule 3 subject to the Escrow Condition.

6.5  The Company hereby irrevocably appoints any director of the Offeror as its
     lawful attorney for the purposes of executing transfers in relation to the
     Non-ISP Interests in favour of the Purchaser and the Deed of Novation and
     any other documents necessary to implement Escrow Completion on the
     Company's behalf, such appointment to be by way of security for the
     Company's obligations in respect of Escrow Completion.

6.6  The Purchaser hereby irrevocably appoints any director of the Offeror as
     its lawful attorney for the purposes of executing the Deed of Novation and
     any other documents necessary to implement Escrow Completion on its behalf,
     such appointment to be by way of security for the Purchaser's obligations
     in respect of Escrow Completion.

6.7  Escrow Completion shall take place at the offices of Slaughter and May at 4
     Coleman Street London EC2V 5DB at 12.00 noon on the Escrow Completion
<PAGE>

     Date, or such other place, time and date as the parties may agree. To the
     extent that, at Escrow Completion, the Purchaser or the Company has not
     complied with its obligations under schedule 3, the Offeror shall, to the
     extent practicable, exercise its power of attorney under clauses 6.4 and
     6.5 to effect Escrow Completion.

6.8  The Purchaser undertakes promptly following Completion to pay all
     applicable stamp duty and/or transfer taxes on the transfer of the Non-ISP
     Interests.

7.   Tax Covenant

7.1  The Purchaser covenants with the Company to pay to the Company an amount
     equal to any Tax Liability of the Company or any member of the ITG Group
     arising directly or indirectly as a consequence of or by reference to the
     transfer to the Purchaser of the Non-ISP Interests.

7.2  The covenant in clause 7.1 will not apply except to the extent that such
     Tax Liability exceeds the Consideration plus where clause 6.1(b)(ii) is
     relevant, the product of the number of Redstone Shares at the Effective
     Date multiplied by the applicable Base Value, less the Aggregate Additional
     Cash Payment.

7.3  Where the Purchaser becomes liable to make any payment under this clause,
     the due date for making that payment shall be the last date on which the
     Company or member of the ITG Group would have had to have paid to the
     appropriate Tax Authority the Tax that has given rise to the Purchaser's
     liability under this clause in order to avoid incurring a liability to
     interest or a charge or penalty in respect of that Tax Liability.

7.4  If a payment required to be made by the Purchaser under this clause is not
     made by the due date for the making thereof, that payment shall carry
     interest from that due date until the date when the payment is actually
     made at the rate of two per cent. above the base rate from time to time of
     National Westminster Bank plc.

7.5  The Purchaser shall not be liable for any Tax Liability if:

     (i)  such Tax Liability would not have arisen but for any act, omission or
          transaction done, made or carried out by the Company or the Offeror
          after Completion otherwise than:

          (a)  as required by law;

          (b)  pursuant to a legally binding commitment of the Company or the
               Offeror created on or before the Effective Date; or
<PAGE>

           (c)  in the ordinary course of business of the Company or the Offeror
                as carried on immediately before the Effective Date; or

     (ii)  such Tax Liability would not have arisen but for a change in the
           accounting policies or practices of any one or more of the Company or
           Concentric introduced after the Effective Date other than a change
           which is required in order to comply with the accounting requirements
           of the Companies Act 1985, statements of standard accounting
           practice, financial reporting standards and any other accounting
           standards issued by the Accounting Standards Board Limited (including
           abstracts issued by the Urgent Issues Task Force of the Accounting
           Standards Board Limited) or any other body from time to time
           prescribed by regulations pursuant to section 256 Companies Act 1985
           and any other accounting principle observance of which by the Company
           is required in order to ensure its accounts and those of any other
           company with which its accounts are consolidated comply with
           applicable law, or

     (iii) such Tax Liability arises as a result of the failure to submit the
           returns, self-assessment and/or computations required to be made by,
           or on behalf of, the Company or the failure to submit such returns
           and computations within the appropriate time limits or otherwise than
           on a proper basis, in each case after the Effective Date.

7.6  No claim shall be brought by the Company under this agreement against the
     Purchaser unless notice of the claim has been given to the Purchaser not
     later than 7 years after the Effective Date.

7.7  The Company shall take or cause to be taken such action as the Purchaser
     may by written notice given to the Company reasonably request to dispute,
     resist, appeal against, compromise or defend the imposition of any Tax
     Liability and any determination in respect thereof or to apply to postpone
     (so far as legally possible) the payment of any Tax Liability pending the
     determination of any appeal but subject to the Company being indemnified to
     its reasonable satisfaction against all losses (including any additional
     Taxation Liability of such person), interest, costs, damages and expenses
     which may be thereby incurred by or charged against the Company or any
     member of the ITG Group, provided that:

     (a)  any request made by the Purchaser shall be made within the shorter of
          21 days from receipt of any notice of a Tax Liability from the Company
          and five days before any time limit expires; and

     (b)  the Company shall not be obliged to comply with any request of the
          Purchaser which involves contesting any Tax Liability before any court
          or any other appellate body (including any VAT tribunal or the Special
<PAGE>

          or General Commissioners) unless they have been advised in writing, at
          the expense of the Purchaser, by leading tax counsel instructed by
          agreement between the Purchaser and the Company that an appeal against
          the assessment for the Tax Liability in question will, on the balance
          of probabilities, be won by the Company.

8.   Withholdings

8.1  If any deductions or withholdings are required by law to be made from any
     sums payable by the Purchaser or the Nominated Directors or the Trustee
     under any provision of this agreement, the Purchaser, the Nominated
     Directors or the Trustee as the case may be shall be obliged to pay to the
     Company or to the Offeror, as the case may be, such sum as will, after the
     deduction or withholding has been made, leave the Company or the Offeror,
     as the case may be, with the same amount as it would have been entitled to
     recover in the absence of any such requirement to make a deduction or
     withholding.

8.2  If any sum payable by the Purchaser or the Nominated Directors or the
     Trustee to the Company or the Offeror as the case may be, under any
     provision of this agreement shall be subject to a Tax Liability in the
     hands of the Company or of the Offeror, as the case may be, the Purchaser,
     the Nominated Directors or the Trustee as the case may be shall be under
     the same obligation to make an increased payment in relation to that Tax
     Liability as if the liability were a deduction or withholding required by
     law.

9.   Guarantee

9.1  (i)  The Nominated Directors and the Trustee unconditionally and
          irrevocably guarantee to the Offeror and to the Company the due and
          punctual discharge and performance by the Purchaser of its obligations
          pursuant to this agreement and agree that if at any time or from time
          to time any amount payable by the Purchaser or other obligation of the
          Purchaser is not paid or performed in full on the due date therefor,
          they will promptly after being given not less than two Business Days'
          notice of the failure of the Purchaser to make such payment or perform
          such other obligation (and if such failure is not remedied by the
          Purchaser in the interim) unconditionally pay or perform or procure
          the payment or performance of the relevant amount or obligation to the
          Offeror or to the Company;

     (ii) Each of the Nominated Directors and the Trustee shall be liable under
          paragraph (i) above as if he were a primary obligor of the Purchaser's
          obligations contained in this agreement (the "Guaranteed
          Obligations");
<PAGE>

     (iii) The obligations of the Nominated Directors and the Trustee under
           paragraphs (i) and (ii) above:

           (a)  shall be continuing obligations and shall not be satisfied,
                discharged or affected by any intermediate payment or settlement
                of account or any change in the constitution or control of, or
                the insolvency of, or any liquidation, winding-up or analogous
                proceedings relating to, the Purchaser or any change in the
                terms or nature of the Guaranteed Obligations; and

           (b)  shall not be discharged, prejudiced, lessened, affected or
                impaired by any act, omission or circumstance whatsoever which
                but for this provision might operate to release or exonerate the
                Purchaser from all or any part of the Guaranteed Obligations;

     (iv)  As a separate and independent stipulation each of the Nominated
           Directors and the Trustee agrees that if any of the Guaranteed
           Obligations are not enforceable against or recoverable from the
           Purchaser by reason of any legal limitation, disability or incapacity
           or any fact or circumstances or otherwise (together "Factors"), they
           shall nevertheless be enforceable against and recoverable from him as
           though the same had been incurred by him and he were the sole or
           principal obligor in respect thereof and shall be performed or paid
           by him on demand provided that the foregoing provisions of this
           paragraph (D) shall not be construed so as to impose on Nominated
           Directors and the Trustee any liabilities or obligations in excess of
           those the Purchaser would have been under had such Factors not
           pertained;

     (v)   This guarantee shall constitute primary obligations of the Guarantor
           and the Offeror shall not be obliged to make any demand on or enforce
           any rights against the Purchaser or any other person before being
           entitled to enforce its rights against either of the Guarantor under
           this clause 9.1.

9.2  The liabilities and obligations of the Nominated Directors and the Trustee
     pursuant to this clause 9, and pursuant to any other clause of this
     agreement in which representations, warranties, undertakings or obligations
     of the Nominated Directors and the Trustee are set out, shall be joint and
     several.

10.  Conduct of Business


10.1 (A)  The Purchaser agrees that, without the prior consent of the Offeror,
          between the date of this agreement and the Effective Date, it will
<PAGE>

          conduct no business, enter into no agreements, documents or make any
          commitments or arrangements save, in each case, solely for the
          purposes of the implementation of the matters contemplated by this
          agreement and in furtherance of the Red Wave Offer.  In particular,
          but without limitation, if shall not do any of the matters referred to
          in clause 10.2, mutatis mutandis.

     (B)  The Purchaser undertakes at all times to comply with applicable law
          and regulations in the conduct its business, in the making of the Red
          Wave Offer and in the performance of its obligations pursuant to this
          agreement.

10.2 Save as may be necessary to give effect to the Scheme, the Warrant
     Proposals or the matters contemplated by this agreement, the Company agrees
     that, between this date of this agreement and the Effective Date, the
     Company and each member of the ITG Group shall conduct its business in the
     ordinary and usual course and, without limitation, shall not do or commit
     to do any of the following matters without the prior written consent of the
     Offeror (such consent not to be unnecessarily withheld or delayed):

     (a)  alter the nature or scope of its business in any material way; or

     (b)  enter into, amend to a significant extent, terminate or supplement to
          a significant extent any material agreement; or

     (c)  take any action which might materially delay or prejudice the
          implementation of the Scheme; or

     (d)  dispose of, agree to dispose of, or grant or agree to grant any option
          or licence in respect of its business or acquire or agree to acquire
          any assets, business or undertaking, in each such case except in the
          ordinary course of trading; or

     (e)  declare, make or pay any dividend or other distribution or in any way
          reduce its reserves; or

     (f)  except pursuant to the exercise of Warrants or existing share options
          under the ITG Share Options Schemes, create, allot or issue or agree
          to create, allot, or issue, or sub-divide, consolidate or redesignate
          any shares or other securities of whatsoever nature convertible into
          shares; or

     (g)  create, issue redeem or grant any option or right to subscribe in
          respect of any share capital or agree so to do; or
<PAGE>

     (h)  incur any capital expenditure (other than pursuant to binding
          commitments in existence at the date of this agreement) greater than
          (Pounds)100,000; or

     (i)  form, enter into, terminate or withdraw from any partnership,
          consortium, joint venture or similar arrangement which is or is
          reasonably likely to be material to it; or

     (j)  alter the provisions of its Memorandum or Articles of Association (or
          equivalent constitutional documents) or adopt or pass further
          regulations or resolutions inconsistent therewith or re-register as an
          unlimited company; or

     (k)  change its accounting reference date; or

     (l)  discontinue or cease to operate all or a part of its business; or

     (m)  change its residence for tax purposes or become resident in any other
          jurisdiction for tax purposes; or

     (n)  reduce its share capital or purchase or redeem its own shares; or

     (o)  pass any resolution in general meeting or by way of written resolution
          for winding-up or the appointment of an administrator, receiver or
          administrative receiver or over any part of its business or assets; or

     (p)  except as required by law or by a change in generally accepted
          accounting principles in the United Kingdom, make any material change
          to the accounting principles by reference to which would have a
          material effect on the information disclosed to the Offeror prior to
          the date hereof; or

     (q)  (except in the usual course of trading) amend the terms of employment
          or engagement of a director, other officer or senior employee who is
          proposed to be a director, officer or employee of it or employ, engage
          or terminate the employment or engagement of, such a person ("senior
          employee" for this purposes meaning an employee earning more than
          (Pounds)40,000 per annum); or

     (r)  increase borrowings or incur other indebtedness other than pursuant to
          existing arrangements and other than trade creditors in the ordinary
          and normal course of trading; or

     (s)  enter into or render itself liable for any capital commitment which
          exceeds (Pounds)100,000; or
<PAGE>

     (t)  except in the ordinary course of its trading, start any material
          litigation or arbitration proceedings; or

     (u)  except in the ordinary course of its trading, compromise, settle,
          release or discharge any material litigation or arbitration
          proceedings or a material liability, claim, action, demand or dispute
          or waive a material right in relation to any material litigation or
          arbitration proceedings; or

     (v)  dispose of any interest in any of the Non-ISP Interests; or

     (w)  increase the amount of the Global Wave Debts other than in the
          ordinary course of business; or

     (x)  pay, discharge or satisfy any material claim, liability or obligation
          other than payment, discharge or satisfaction in the ordinary course
          of business.

11.  The Offer and the Red Wave Offer

11.1 Immediately after execution of this agreement, the Nominated Directors
     shall each execute an irrevocable voting undertaking in favour of the
     Offeror and Bear, Stearns International substantially in the form set out
     in Schedule 2 Part A and the Trustee shall execute on behalf of GIC an
     irrevocable voting undertaking in favour of the Offeror and Bear, Stearns
     International substantially in the form set out in Schedule 2 Part B.

11.2 Each of the Nominated Directors and the Trustee hereby irrevocably
     undertakes not to make an election for additional cash under the Mix and
     Match Election and to elect to apply their respective entitlements to
     Additional Cash Payments in subscribing Red Wave Shares pursuant to the
     terms of the Red Wave Offer .

11.3 Subject to the rights and obligations of the Purchaser and the Company with
     respect to the sale and purchase of the Non-ISP Interests not having been
     terminated, the Purchaser agrees to make the Red Wave Offer and to allot
     and issue Red Wave Shares to ITG Shareholders and Warrantholders validly
     exercising their entitlement under the Red Wave Offer to elect to receive
     such Red Wave Shares, such allotment and issue to be effected within
     fourteen days of the Effective Date. The Red Wave Offer shall be made on
     the basis that the existing shares held in Red Wave by the Trustee shall be
     deducted from the Trustee's pro rata entitlement.

11.4 The Purchaser and the Company agree that the Offeror shall be entitled to
     retain (and the Offeror hereby agrees to retain) from the cash
     consideration payable to ITG Shareholders under the Offer and the Warrant
     Proposals upon
<PAGE>

      the Scheme becoming effective an amount equal to the aggregate amount of
      cash that ITG Shareholders and Warrantholders have elected to subscribe
      for Red Wave Shares pursuant to the Red Wave Offer (the "Shareholder
      Retained Amount"), such amount to be determined by reference to the
      certificate to be delivered by the Purchaser to the Offeror at Escrow
      Completion pursuant to schedule 3, and the Purchaser irrevocably and
      unconditionally directs the Offeror to apply such retained amount towards
      discharge of the Purchaser's obligations to the Company under this
      agreement. Application of the Shareholder Retained Amount as aforesaid
      shall discharge the Offeror's obligation to pay Additional Cash Payments
      to such electing Shareholders and Warrantholders to the extent so applied.

11.5  The Nominated Directors and the Trustee each agree with the Offeror that
      the Offeror shall be entitled to retain (and the Offeror hereby agrees to
      retain) from the cash consideration which would otherwise be payable to
      each of them respectively under the Offer and/or pursuant to the Warrant
      Proposals such amount as is necessary, taken together with the Shareholder
      Retained Amount, to discharge the Purchaser's obligations to pay the
      Consideration to the Company (the "Nominated Directors' Retained Amount").
      The Nominated Directors and the Trustee irrevocably and unconditionally
      direct the Offeror to apply the Nominated Directors' Retained Amount
      towards discharge of the Purchaser's obligations to the Company under this
      agreement. Application of the Nominated Directors' Retained Amount as
      aforesaid shall discharge the Offeror's obligations to pay cash pursuant
      to the offers to the Nominated Directors and the Trustee to the extent so
      applied.

12.   Representations, warranties and undertakings

      (A)  Each of the parties that are bodies corporate represent and warrant
           to each other on the date hereof and immediately prior to the Posting
           Date in the following terms:

           (i)    it is a company duly incorporated and in good standing under
                  the laws of its place of incorporation;

           (ii)   it has the legal right and the necessary corporate power and
                  authority to enter into and perform this agreement;

           (iii)  this agreement will, when executed, constitute valid and
                  binding obligations of the relevant party and neither such
                  execution, or the performance of this agreement, will result
                  in a breach of, or constitute a default under, any instrument
                  to which the relevant party is a party or by which the
                  relevant party is bound or result in a breach of any order,
                  judgment or decree by which the relevant party is bound;
<PAGE>

           (iv)   the execution and delivery of, and the performance by the
                  relevant party of its obligations under, this agreement and as
                  contemplated by the Red Wave Offer, the Offer and the Warrant
                  Proposals will not result in a breach of any provision of the
                  constitutional documents of the relevant party or require the
                  consent of its shareholders.

      (B)  (i)    Each of the Nominated Directors represent and warrant to each
                  other party on the date hereof and immediately prior to the
                  Posting Date:

                  (a)  in the terms of paragraphs (ii) and (iii) of sub-clause
                       (A); and

                  (b)  that he is not bankrupt, nor is he the subject of any
                       bankruptcy petition, or application for an interim order
                       under section 253 of the Insolvency Act 1986, he is able
                       to pay his debts when they falls due, no person has been
                       ordered by any court to prepare a report with respect to
                       him under section 273 of the Insolvency Act 1986 and no
                       interim receiver has been appointed in respect of his
                       property under section 286 of the Insolvency Act 1986.

           (ii)   Each of the Nominated Directors and the Trustee irrevocably
                  undertakes not to grant any charge, security, lien or other
                  encumbrance or third party interest over any consideration to
                  which he may become entitled pursuant to the Offer or the
                  Warrant Proposals.

           (iii)  The Purchaser represents and warrants to the Company and the
                  Offeror that it has obtained a certificate pursuant to section
                  117(1) of the Companies Act 1985.

           (iv)   The Nominated Directors and the Company hereby represent and
                  warrant to the Offeror that:

                  (i)  the Company has not provided unlawful financial
                       assistance within the meaning of section 152 of the
                       Companies Act 1985 directly or indirectly in connection
                       with this agreement, the matters contemplated by it, the
                       Scheme or the Offer and that the estimate of expenses
                       provided to the Offeror sets out all material items of
                       expense to be incurred in connection with the negotiation
                       and implementation of this agreement;
<PAGE>

                  (ii) there are no circumstances that have not been fairly
                       disclosed to the Offeror or its Agents which would, or
                       would be reasonably likely to, give rise to a breach of
                       any of the conditions set out in Part B of Appendix I to
                       the Press Announcement or which would prevent any such
                       condition from being fulfilled or satisfied or from being
                       waived.

           (v)    The Company undertakes to the Offeror:

                  (a)  to comply with all applicable law and regulations
                       including, without limitation, rules, regulations and
                       requirements from time to time of the Alternative
                       Investment Market of the London Stock Exchange; and

                  (b)  to inform the Offeror promptly upon becoming aware of any
                       matter or circumstance which would or would be reasonably
                       likely to give rise to a breach of any of the conditions
                       set out in Part B of Appendix I to the Press Announcement
                       or which would prevent any such condition from being
                       fulfilled or satisfied or from being waived

           (vi)   The Purchaser, the Company, the Trustee and the Nominated
                  Directors each severally undertake to the Offeror, not to take
                  any action outside the requirements of this agreement which
                  could commit the Offeror to any obligation under the City Code
                  without the prior written consent of the Offeror. In
                  particular, but without limitation, neither the Nominated
                  Directors nor the Trustee shall acquire any interests in ITG
                  Shares either by exercise of share options or subscription
                  rights attaching to Warrants or otherwise (other than as may
                  be required by this agreement).

           (vii)  Each of the parties undertake to each other party to comply in
                  all respects with the rules of the City Code and with the
                  determinations of the Panel with respect to the Offer and the
                  Warrant Proposals.

           (viii) The Trustee represents, warrants and undertakes that:

                  (a)  GIC is the registered owner of the number of ITG Shares
                       referred to in recital (D) to this agreement; and
<PAGE>

                  (b)  it has full power and authority to bind GIC, and to
                       ensure compliance by GIC, on the terms of this agreement.

12.2  Each of the Nominated Directors hereby undertakes to procure that
      immediately prior to the Effective Date, the Purchaser shall have
      sufficient authorised and unissued ordinary share capital, and the
      requisite authorities and disapplication under sections 80 and 89 of the
      Companies Act 1985, to permit ITG Shareholders to subscribe their maximum
      entitlement to the Red Wave Shares under the Red Wave Offer.

12.3  The Company and the Offeror agree to use their respective reasonable
      endeavours to reach agreement with 2PR Holding BV to vary the terms of the
      agreement dated 27th January, 1999 between ITG, ITG (Europe) Limited and
      2PR Holding BV (as amended) which requires the Company to issue ITG Shares
      to 2PR Holding BV on terms satisfactory to the Company and the Offeror.

12.4  Unless, in the reasonable opinion of the directors of the Company other
      than the Nominated Directors, the Company would be unable to pay its debts
      as they fall due as a result of complying with this undertaking, the
      Company undertakes to the Offeror that for the period commencing with the
      date of this agreement and ending six months after lapse of the Scheme or
      the Offer for any reason it will not, and that it will procure that no
      member of the ITG Group, or its or their respective Agents shall, solicit,
      initiate, encourage or enter into (or continue) discussions or
      negotiations relating to any proposal whereby any third party would
      acquire control of a majority of the voting rights normally exerciseable
      at a general meeting of the Company or the implementation of which would
      be inconsistent with or which would or would be reasonably likely to
      frustrate the acquisition of control of the Company by the Offeror, the
      implementation of the Scheme or any of the transactions contemplated by
      this agreement. In addition, save as may be required by law, regulation or
      the City Code, the Company shall ensure that no member of the ITG Group
      (nor any Agents of such members) discloses any information which is
      confidential to the relevant member to any third party making any such
      proposal.

12.5  The Company undertakes to keep the Offeror fully informed, subject to
      compliance with legal and regulatory requirements, with respect to any
      approaches made to it by any third party concerning an offer for the
      Company (howsoever to be implemented) or any transaction which would be
      inconsistent with or which would or would be reasonably likely to
      frustrate the acquisition of control of the Company by the Offeror, the
      implementation of the Scheme or any of the transactions contemplated by
      this agreement.
<PAGE>

12.6  In consideration of the Offeror agreeing to the release of the Press
      Announcement and to make available to the Company the Loan, the Company
      undertakes that if any other person announces a firm intention (within the
      meaning of the Code) to make an offer or proposal for the takeover of ITG,
      or merger of that person and the Company, howsoever effected, either
      without preconditions or with only such preconditions as are accepted by
      or acceptable to the Panel and the Scheme does not become effective then,
      within two business days after written demand by the Offeror, the Company
      shall pay to the Offeror the sum of (Pounds)1 million.

12.7  If the Scheme becomes effective the Company agrees to use its reasonable
      endeavours to procure the release of Jan Murray from the security given to
      Lucent Technologies in respect of the obligations of the Company.

12.8  The Company, Jan Murray and the Trustee each represent and warrant to the
      Offeror that the acquisition of ITG Shares by Jan Murray and the Trustee
      pursuant to the exercise of subscription rights attaching to any Warrants
      will not give rise to an obligation pursuant to Rule 9 of the City Code
      imposed on Jan Murray, the Trustees, Laurence Blackall or the Offeror.

13.   Termination

13.1  Without prejudice to any other provision of this agreement, if the Scheme
      Document is not posted to ITG Shareholders and Warrantholders on or before
      the Longstop Date, the Company or the Offeror shall be entitled to
      terminate this agreement by serving notice in writing upon each other
      party in which case the Offer and the Warrant Proposals, the Scheme and
      the sale of the Non-ISP Interests shall not proceed.

13.2  (i)  If, prior to the Posting Date any event, circumstance or matter
           occurs with respect to the Company or any member of the ITG Group
           which would (or would be reasonably likely to), if it were to occur
           subsequent to the Posting Date, result in any of the conditions set
           out in Part B of Appendix 1 to the Press Announcement not being
           satisfied or fulfilled or would or would be reasonably likely to
           prevent any such condition from being satisfied or fulfilled, or
           would or would be reasonably likely to give the Offeror grounds not
           to proceed with the Offer for any reason, then, with the consent of
           the Panel, the Offeror may terminate this agreement by serving notice
           in writing upon each other party.

      (ii) If, prior to the Posting Date any event, circumstance or matter
           occurs with respect to the Offeror or any member of the Concentric
           Group which would (or would be reasonably likely to), if it were to
           occur subsequent to the Posting Date and on the basis that the
           conditions set out in Part B of Appendix 1 of the Press Announcement
           were to apply
<PAGE>

           to the Offeror and the Concentric Group on the same terms as to the
           Company, mutatis mutandis, result in any of such conditions not being
           satisfied or fulfilled, or would be reasonably likely to prevent any
           such condition from being satisfied or fulfilled then, with the
           consent of the Panel, the Company may terminate this agreement by
           serving notice in writing upon each other party.

13.3  This agreement shall terminate upon lapsing of the Offer or in the event
      that the Scheme does not become effective on or before 31 January, 2000.

13.4  In the event of termination of this agreement, all the rights and
      obligations of the parties hereunder shall terminate (but without
      prejudice to accrued rights and liabilities) save that clauses 12.4 and
      12.6, 16, 17, 20 and 24 shall continue to apply.

14.   Further assurance

Each of the parties shall from time to time, on being required to do so by any
other party to this agreement now or at any time in the future, do or procure
the doing of all such acts and/or execute or procure the execution of all such
documents in a form reasonably satisfactory to the requesting party as the
requesting party may reasonably consider necessary for giving full effect of
this agreement and securing to the requesting party the full benefit of the
rights, powers and remedies conferred upon the requesting party in this
agreement.

15.   Announcements

15.1  Subject to sub-clause 15.2, no announcement (other than the Press
      Announcement) concerning the Offer, the Scheme, the Warrant Proposals or
      the Red Wave Offer or any ancillary matter contemplated by this agreement
      shall be made by any party hereto without the prior written approval of
      the Offeror, such approval not to be unreasonably withheld or delayed.

15.2  The Company and the Offeror may make such announcements as are required
      by:

      (i)  the law of any relevant jurisdiction; or

      (ii) any securities exchange or regulatory or governmental body to which
           either party is subject or submits, wherever situated, including
           (without limitation) the Nasdaq National Market and the London Stock
           Exchange, whether or not the requirement has the force of law,

      in which case the party concerned shall take all such steps as may be
      reasonable and practicable in the circumstances to agree the contents of
      such announcement with the other party before making such announcement.
<PAGE>

16.   Confidentiality

16.1  Subject to sub-clause 16.2 and clause 15, each party shall treat as
      strictly confidential all information received or obtained as a result of
      entering into or performing this agreement which relates to:

      (i)   the provisions of this agreement;

      (ii)  the negotiations relating to this agreement;

      (iii) the subject matter of this agreement; or

      (iv)  any other party.

16.2  Each party may disclose information which would otherwise be confidential
      if and to the extent:

      (i)   required by the law of any relevant jurisdiction;

      (ii)  required by existing contractual obligations;

      (iii) required by any securities exchange or regulatory or governmental
            body to which either party is subject or submits, wherever situated,
            including (without limitation) the Nasdaq National Market and the
            London Stock Exchange, whether or not the requirement for
            information has the force of law;

      (iv)  required to vest the full benefit of this agreement in the relevant
            party;

      (v)   disclosed to the professional advisers, auditors and bankers of each
            party;

      (vi)  the information has come into the public domain through no fault of
            that party; or

      (vii) the party which has provided the relevant information has given
            prior written approval to the disclosure,

      provided that any such information disclosed pursuant to paragraph (i),
      (ii) or (iii) of this sub-clause shall be disclosed only after
      consultation with the Offeror and the Company and if such information is
      in the form of an announcement, then the party concerned shall take all
      such steps as may be reasonable and practicable in the circumstances to
      agree the contents of such announcement with the other party before making
      such announcement.
<PAGE>

17.  Costs and Expenses

Each party shall pay its own costs and expenses in relation to the negotiation
and preparation of this agreement and the implementation of the transactions
contemplated hereby.

18.  Effect of Completion

Any provision of this agreement which is capable of being performed after but
which has not been performed at or before the Effective Date and all covenants
and other undertakings contained in or entered into pursuant to this agreement
shall remain in full force and effect notwithstanding the Effective Date.

19.  Assignment

No party shall, save with the consent of each other party, be entitled to assign
any of its rights or benefits under this agreement.

20.  Notices

20.1 Except where expressly stated otherwise, a notice or other communication
     given, or required to be given, under this agreement shall only be
     effective if it is in writing (other than writing on the screen of a visual
     display unit or other similar device which shall not be treated as writing
     for the purposes of this clause).

20.2 Notices or other communications under this agreement shall be sent to a
     party at its address set out above or number and for the attention of the
     individual or department set out below:

     Party                   Attention of:                   Facsimile no.

     The Company             L. Blackall                     (44) 181 957 1154
                             Chief Executive

     The Offeror             M. Anthofer                      (1) 408 817 2876
                             Chief Financial Officer

     The Purchaser           J. Murray                       (44) 181 957 1154

     Jan Murray                          -                   (44) 181 957 1154

     Laurence Blackall                   -                   (44) 181 957 1154

     The Trustee             William Hunter                  (44) 1481 710 091

                                       29
<PAGE>

     provided that a party may change its notice details on giving notice to
     each other party of the change in accordance with this clause. That notice
     shall only be effective on the day falling five clear Business Days after
     the notification has been deemed duly given in accordance with clause 20.3
     or such later date as may be specified in the notice.

20.3 Any notice given under this agreement shall, in the absence of earlier
     receipt, be deemed to have been duly given as follows:

     (a)  if delivered personally, on delivery;

     (b)  if sent by first class post, two (or, if sent by air mail, ten) clear
          Business Days after the date of posting;

     (c)  if sent by facsimile, on completion of its transmission if
          confirmation of good receipt is obtained by the sender.

20.4 Any notice given under this agreement outside working hours in the place to
     which it is addressed shall be deemed not to have been given until the
     start of the next period of working hours in such place.

21.  Counterparts

21.1 This agreement may be executed in any number of counterparts, and by the
     parties on separate counterparts, but shall not be effective until each
     party has executed at least one counterpart.

21.2 Each counterpart shall constitute an original of this agreement, but all
     the counterparts shall together constitute but one and the same instrument.

22.  Time of Essence

Except as otherwise expressly provided, time is of the essence of this
agreement.

23.  Invalidity

If at any time any provision of this agreement is or becomes illegal, invalid or
unenforceable in any respect under the law of any jurisdiction, that shall not
affect or impair the legality, validity or enforceability in that jurisdiction
of any other provision of this agreement.

24.  Choice of Governing Law

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

<PAGE>

25.  Jurisdiction

25.1 Each of the parties to this agreement irrevocably agrees that the courts of
     England shall have exclusive jurisdiction to settle any disputes which may
     arise out of or in connection with this agreement and that accordingly any
     proceedings may be brought in the courts of England.

25.2 Each party irrevocably waives any objection which it may have now or
     hereafter to the laying of the venue of any proceedings in the courts of
     England and any claim that any such proceedings have been brought in an
     inconvenient forum and further irrevocably agrees that a judgement in any
     proceedings brought in the courts of England shall be conclusive and
     binding upon such party and may be enforced in the courts of England.

Executed as a deed by
the Company acting by:


LAURENCE BLACKALL
 ......................................
Director


JAN MURRAY
 ......................................
Director

Executed as a deed by
the Offeror acting by:


HENRY R. NOTHHAFT
 ......................................
Director & Officer

MICHAEL ANTHOFER
 ......................................
Officer, Senior Vice President and CFO

<PAGE>

Executed as a deed by
the Purchaser acting by:


JAN MURRAY
 ......................................
Director



RICHARD BROCKSOM
 ......................................
Secretary

Executed and delivered as a deed by                 in the presence of:
Jan Murray:
                                                    EDWARD LUKINS
JAN MURRAY                                          ...........................
 ......................................              KEMPSON HSE, LONDON EC3A 7AN
                                                    ............................

                                                    (name and address of witness

Executed and delivered as a deed by                 in the presence of:
Laurence Blackall:
                                                    EDWARD LUKINS
LAURENCE BLACKALL                                   ...........................
 ......................................              KEMPSON HSE, LONDON EC3A 7AN
                                                    ...........................

                                                    (name and address of witness

<PAGE>

Executed as a deed by
the Trustee acting by


STEPHEN HARLOW
 ..........................................
Director

W. HUNTER
 ..........................................
For Consultancy & Secretarial Services Ltd.
Secretary

<PAGE>

                                  Schedule 1

                             (Press Announcement)



<PAGE>

                                  Schedule 2

                       (Irrevocable Voting Undertakings)

Part A: Nominated Directors

(Signed copies received on execution)

<PAGE>

Part B: Trustee

(Signed copy received on execution)
<PAGE>

                                  Schedule 3

                           (Completion Arrangements)

At Completion:

1.   The Company shall deliver to the Purchaser:

(A)  Duly executed transfers in respect of:

     (i)   the Wave Shares;

     (ii)  subject to clause 6.1, the Redstone Shares;

     (iii) the Ballynatray Shares;

     (iv)  the Global Wave Shares; and

     (v)   the share certificates for the above in the name of the relevant
           transferor and any power of attorney under which any transfer is
           executed;

(B)  A counterpart of the Deed of Novation executed by those parties thereto
     which are members of the ITG Group.

(C)  A deed of release in a form reasonably satisfactory to Red Wave whereunder
     the Company releases Global Wave Limited from its obligations to repay the
     Global Wave Debts to the Company in consideration of a payment by Red Wave
     of an equivalent amount to the Company as part of the Consideration.

(D)  A copy of the minutes of a duly held meeting of the directors of the
     Company authorising the execution by the Company of this agreement.

2.   The Purchaser shall deliver to each other party hereto:

     (i)  a copy of the resolution of the directors of the Purchaser authorising
          the execution by the Purchaser of this agreement; and

     (ii) a certificate from the registrars appointed for the purposes of
          administering the Red Wave Offer of the aggregate amount of cash in
          respect of which elections to subscribe Red Wave Shares pursuant to
          the Red Wave Offer have been received as at the close of business on
          the day prior to the Effective Date.

3.   The Purchaser shall deliver to the Company an executed counterpart of the
     Deed of Novation.
<PAGE>

4.   The Offeror shall deliver to each other party hereto a certified copy of
     the certificate of Bear, Stearns International referred to in clause 6.1.
<PAGE>

                                   Schedule 4
                               (Deed of Novation)

THIS DEED OF NOVATION is made the [      ] day of [      ], 1999

BETWEEN:

1.   [Red Wave plc], a company registered in England and Wales under No.
     [           ] ("Red Wave")

2.   Global Internet Limited, a company registered in England and Wales under
     No. [                  ]("Debtor 1")

3.   GX Networks Limited, a company registered in England and Wales under No.
     [         ]("Debtor 2")

AND

4.   Ballynatray Holdings plc, a company registered in England and Wales under
     No.              [                ]("Creditor")

WHEREAS:

(A)  Pursuant to an agreement dated [                ] ("Agreement 1"), Debtor 1
     owes Creditor certain amounts of principal and interest (the "First Debt")
     which at the date hereof amount to [               ].

(B)  Pursuant to an agreement dated [                ] ("Agreement 2"), Debtor 2
     owes Creditor certain amounts of principal and interest (the "Second Debt")
     which at the date hereof amount to [               ].

(C)  The parties hereto have agreed that the First Debt and the Second Debt
     should be novated to Red Wave so that Debtor 1 and Debtor 2 are released
     and discharged from their obligations to the Creditor in respect of the
     First Debt and the Second Debt respectively in consideration of Red Wave
     assuming like obligations.

NOW IT IS AGREED as follows:

1.   Interpretation

     In this agreement, unless other specified:

(i)  references to clauses are to clauses of this agreement; and

(ii) headings to clauses and schedules are for convenience only and do not
     affect interpretation of this agreement.
<PAGE>

2.   Red Wave's Undertaking

     With effect from the date of this agreement and in consideration of the
     undertakings given by Debtor 1 and Debtor 2 (together the "Debtors") in
     clause 3, Red Wave hereby undertakes to observe, perform, discharge and be
     bound by Agreement 1 and Agreement 2 (together the "Agreements") as if Red
     Wave were an original party to the Agreements in place of the Debtors and
     as principal obligor in respect of the First Debt and the Second Debt.

3.   Debtors' Undertakings and Release of Creditor

     With effect from the date of this agreement and in consideration of the
     undertakings given by Red Wave in clause 2 and the Creditor in clause 4,
     the Debtors hereby release and discharge the Creditor from all obligations
     to observe, perform, discharge and be bound by the Agreements.

4.   Creditor's Undertaking and Release of Debtors

     With effect from the date of this agreement and in consideration of the
     undertakings given by Red Wave in clause 2 and the Debtors in clause 3, the
     Creditor hereby:

     (i)  releases and discharges the Debtors from all obligations to observe,
          perform, discharge and be bound by the Agreements; and

     (ii) accepts Red Wave's undertaking to observe, perform, discharge and be
          bound by  the Agreements (such undertaking being set out in clause 2).

5.   Notices

     For the purposes of all provisions in the Agreements concerning the service
     of notices, the address of Red Wave is its registered office from time to
     time.

6.   Counterparts

6.1  This agreement may be executed in any number of counterparts, and by the
     parties on separate counterparts, but shall not be effective until each
     party has executed at least one counterpart.

6.2  Each counterpart shall constitute an original of this agreement, but all
     the counterparts shall together constitute but one and the same instrument.
<PAGE>

Executed as a deed by Red Wave      )   ........................ Director
acting by a director and its        )
secretary/two                       )   ........................ [Secretary/
directors                           )                            Director]

Executed as a deed by Global        )   ........................ Director
Internet Limited
acting by a director and its        )
secretary/two                       )   ........................ [Secretary/
directors                           )                            Director

Executed as a deed by GX Networks   )   ........................ Director
Limited
acting by a director and its        )
secretary/two                       )   ........................ [Secretary/
directors                           )                            Director]

Executed as a deed by Ballynatray   )   ........................ Director
Holdings plc acting by a director
and its secretary/two directors     )
                                    )   ........................ [Secretary/
                                    )                            Director]
<PAGE>

                                   Schedule 5
                              (Sequence of Events)

                Indicative Outline timetable for Court Procedure

<TABLE>
<CAPTION>
   Indicative Timetable                                         Step
- -------------------------------------------------------------------------------------------------------
<S>                          <C>
D -32                        Preparation of Scheme Document, incorporating an explanatory note of the
                             Scheme
- -------------------------------------------------------------------------------------------------------
D -3                         Application submitted by way of Petition to the Court to convene the
                             Court Meeting and to sanction the Scheme (under S.425(1)).  (N.B.
                             finalised Scheme Document required).
- -------------------------------------------------------------------------------------------------------
D -1                         First Interlocutor (First Order) granted convening the Court Meeting, and
                             containing orders for advertisement
- -------------------------------------------------------------------------------------------------------
D Day                        Issue of Scheme Document to ITG Shareholders, incorporating the Notice of
                             the Court Meeting (N.B. minimum of 21 days' notice required)
- -------------------------------------------------------------------------------------------------------
D Day to D +6                Advertisements (of Court Meeting) made in newspapers, usually FT,
                             Edinburgh Gazette and The Herald or Scotsman (21 days' notice from day of
                             advertisement is required prior to meeting)
- -------------------------------------------------------------------------------------------------------
D +29                        Court Meeting (N.B. may be held in Scotland or England)
- -------------------------------------------------------------------------------------------------------
D +30                        Motion enrolled at Court for the Second Order - to order advertisement of
                             the Scheme and giving a period for the lodging of answers
- -------------------------------------------------------------------------------------------------------
D +56                        Last day for lodging of answers (21 days' notice after advertisement)
- -------------------------------------------------------------------------------------------------------
D +56 to D +66               Motion enrolled for Third Order - to appoint Reporter to prepare a Report
                             on the terms of the Petition (generally this takes  approximately 3-4
                             weeks, but the timescale may be minimised if the Reporter is instructed
                             before his formal appointment (e.g. on or about D Day))
- -------------------------------------------------------------------------------------------------------
D +66 to D +68               Motion enrolled for Final Order
- -------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>

<TABLE>
<S>                          <C>
- -------------------------------------------------------------------------------------------------------
D +70                        Application to Court to grant the Final Order requested in the Petition
                             (i.e. to sanction the resolution of the Court Meeting in terms of
                             S.425(2))
- -------------------------------------------------------------------------------------------------------
D +72                        Delivery to Registrar of a certified copy Interlocutor (i.e. of the Court
                             Order)
- -------------------------------------------------------------------------------------------------------
D +72                        Effective Date
- -------------------------------------------------------------------------------------------------------
</TABLE>



<PAGE>

                                                                  EXHIBIT 99.1

Concentric Network Closes Internet Technology Group PLC Acquisition

Completed Acquisition Positions Concentric as a Significant Global E-Business
Service Provider For Small- and Medium-sized Companies

SAN JOSE, Calif. (January 28, 2000) - Concentric Network Corp. (NASDAQ: CNCX), a
leading provider of e-business services for growing companies, announced today
the closing of its acquisition of Internet Technology Group plc (AIM: ITH), a
leading provider of Internet access and hosting for businesses in the UK and
Europe. With the completion of the acquisition, Concentric gains a solid base of
operations in the UK and the Netherlands - in addition to trans-Atlantic
capacity - enabling Concentric to effectively deliver e-business solutions
worldwide.

"The completion of this deal marks a pivotal turning point for Concentric," said
Henry R. Nothhaft, chairman, president and CEO of Concentric Network. "We now
have network capacity and hosting facilities extending from the UK into Europe,
providing us with the means to rapidly expand throughout the European
marketplace. This gives Concentric the opportunity to extend its market reach
worldwide, and more importantly, allows us to provide our customers more cost
effective access to the European market - an increasingly critical factor for
businesses today."

The acquisition of ITG strengthens Concentric's leadership position as a
worldwide provider of Web hosting and e-commerce. Through the finalized
acquisition, Concentric gains approximately 110,000 full registered domain names
throughout Europe, increasing the number of Concentric's worldwide registered
domains to approximately 390,000. The acquisition also adds approximately
563,000 dial users, including approximately 490,000 from various free services,
and increases the number of hosted Web sites to more than 200,000, including
approximately 57,000 from various free services. The Company believes that the
acquisition solidifies Concentric's position as the second largest shared Web
hosting provider for businesses.

Concentric garners an extensive European network with connectivity via secure
routing, data centers, or through one of 35 other physical Points of Presence
(POPs) located in the UK. These POPs provide coverage to all of the main UK
metropolitan areas, and additional Internet facilities in the Netherlands offer
Concentric direct expansion into mainland Europe. Concentric gains approximately
1Gb/s of international connectivity through ITG's resilient trans-Atlantic and
trans-European network. Furthermore, Concentric strengthens its Tier 1 peering
relationships with major European telecom providers.

Concentric also obtains two additional data centers, one in Harbour Exchange in
the heart of London's Docklands, and the other in Almere near Amsterdam in the
Netherlands, giving the company a total of six telco-grade hosting facilities.
Moreover, Concentric benefits from ITG's strong brand awareness and exceptional
reputation for quality customer support. Laurence Blackall, CEO of ITG, will
remain in this position and report to Mr. Nothhaft. "We are excited about
combining together our collective resources and expertise to provide high-
performance Internet services to business customers with mission-critical
applications," commented Mr. Blackall.

<PAGE>

"We are pleased about adding ITG's talented staff to the Concentric team. Their
supplementary expertise will continue to enhance Concentric's leadership
position in e-business solutions," added Nothhaft.

About Concentric Network Corporation

Concentric Network Corporation provides complete Internet business solutions for
small- and medium-sized enterprises, including DSL access, Web hosting and e-
commerce. The company also offers data center services, virtual private
networks, dedicated access, and application infrastructure services for
delivering applications over the Internet or a VPN. Concentric's services are
offered through a nationwide network of data centers and a private, nationwide
ATM network. All Concentric services are backed by 24/7 customer care and most
include service level agreements. Publicly traded (NASDAQ: CNCX), Concentric is
headquartered in San Jose, CA with operations in Irvine, CA, Chicago, IL, St.
Louis, MO, and Saginaw, MI. For more information, visit
http://www.concentric.net/ or contact Public Relations at
[email protected].

This press release contains forward looking statements regarding Concentric's
acquisition of Internet Technology Group plc (ITG), and the potential benefits
to be realized by the combined companies, including, but not limited to,
expansion of Internet services into Europe, and the anticipated growth of e-
commerce in Europe, that are subject to risks and uncertainties. Actual results
may differ materially from those described in the forward looking statements as
a result of a number of factors. These factors include, but are not limited to,
the combined companies' ability to successfully market its products and services
to current and new customers in a competitive marketplace, the rate of growth of
e-commerce and adoption of the Internet by businesses in Europe, and the
companies' ability to successfully integrate their operations, products and
services.

Concentric Network Corporation and the Concentric logo are all trademarks of
Concentric Network Corporation. Other product names mentioned herein may be
trademarks and/or registered trademarks of their respective companies.

Leslie Johnson
Wilson McHenry Co.
510.723.6200
[email protected]

Concentric Network Contact:
Rachel Brant
Public Relations Associate
Concentric Network
408.794.2119
[email protected]


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