Holding(s) in Company

Gresham Computing PLC
23 July 2007


TR-1:               Notification of major interests in shares


1. Identity of the issuer or the underlying issuer of existing            GRESHAM COMPUTING PLC
shares to which voting rights are attached:


2. Reason for the notification     (please tick the appropriate box or boxes)

An acquisition or disposal of voting rights                                                       X

An acquisition or disposal of financial instruments which may result in the acquisition of
shares already issued to which voting rights are attached

An event changing the breakdown of voting rights

Other (please specify):


3. Full name of person(s) subject to the notification            THE NORTHWESTERN MUTUAL LIFE INSURANCE
obligation:                                                      COMPANY FOR ITS GENERAL ACCOUNT
                                                                 NORTHWESTERN MUTUAL SERIES FUND INC -
                                                                 ASSET ALLOCATION FUND
                                                                 NORTHWESTERN MUTUAL SERIES FUND INC -
                                                                 BALANCED FUND
                                                                 NORTHWESTERN MUTUAL SERIES FUND INC -
                                                                 INTERNATIONAL GROWTH FUND
                                                                 MASON STREET ADVISORS LLC


4. Full name of shareholder(s) (if different from 3.):           THE NORTHWESTERN MUTUAL LIFE INSURANCE
                                                                 COMPANY FOR ITS GENERAL ACCOUNT
                                                                 NORTHWESTERN MUTUAL SERIES FUND INC -
                                                                 ASSET ALLOCATION FUND
                                                                 NORTHWESTERN MUTUAL SERIES FUND INC -
                                                                 BALANCED FUND
                                                                 NORTHWESTERN MUTUAL SERIES FUND INC -
                                                                 INTERNATIONAL GROWTH FUND


5. Date of the transaction (and date on which the threshold is                 16 July 2007
crossed or reached if different):


6. Date on which issuer notified:                                              20 July 2007


7. Threshold(s) that is/are crossed or reached:                                     4%


8. Notified details:


A: Voting rights attached to shares

Class/type of     Situation previous to   Resulting situation after the triggering transaction
shares            the Triggering
                  transaction

 if possible      Number of   Number of   Number of     Number of voting rights   % of voting rights
using the ISIN    Shares      Voting      shares
CODE                          Rights                    Direct       Indirect     Direct       Indirect

GB0008808825      2,032,704   2,032,704   2,007,004                  2,007,004                 3.99%



B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial    Expiration date Exercise/ Conversion      Number of voting rights    % of voting
instrument                           Period/ Date              that may be acquired if    rights
                                                               the instrument is
                                                               exercised/ converted.



Total (A+B)

Number of voting rights                            % of voting rights

2,007,004                                          3.99%


9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively
held, if applicable:

MASON STREET ADVISORS LLC, A LIMITED LIABILITY COMPANY ORGANIZED UNDER THE LAWS OF DELAWARE, IS A REGISTERED INVESTMENT
ADVISER UNDER THE INVESTMENT COMPANY ACT 1940 AND IS A WHOLLY OWNED SUBSIDIARY OF THE NORTHWESTERN MUTUAL LIFE
INSURANCE COMPANY.  MASON STREET ADVISORS LLC HAS ENTERED INTO INVESTMENT ADVISORY AGREEMENTS WITH THE SHAREHOLDERS
LISTED BELOW, PURSUANT TO WHICH IT VOTES (OR INSTRUCTS THE CUSTODIAN HOW TO VOTE) THE SHARES OF THE ISSUER.

THE SHAREHOLDERS AND THE NUMBER OF SHARES OF THE ISSUER HELD BY EACH, RESPECTIVELY, AFTER GIVING EFFECT TO THE
TRIGGERING TRANSACTION, ARE:

1.        THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY FOR ITS GENERAL ACCOUNT: 1,645,067

2.        NORTHWESTERN MUTUAL SERIES FUND INC - ASSET ALLOCATION FUND: 38,450

3.        NORTHWESTERN MUTUAL SERIES FUND INC - BALANCED FUND: 197,485

4.        NORTHWESTERN MUTUAL SERIES FUND INC - INTERNATIONAL GROWTH FUND: 126,002


Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

14. Contact name:                            CHRIS ERRINGTON, COMPANY SECRETARY

15. Contact telephone number:                01489 555500




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