Major Interest in Shares

RNS Number:8421N
IDMoS plc
12 February 2008



For Immediate Release                                          12 February 2008


                                   IDMoS plc



TR - 1:       NOTIFICATION OF MAJOR INTERESTS IN SHARES



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


    IDMoS Plc


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

    An acquisition or disposal of voting rights


3.  Full name of person(s) subject to the notification obligation:


    Schroder plc


4.   Full name of shareholder(s) (if different from 3.)


    n/a


5.  Date of the transaction and date on which the threshold is crossed or
    reached:


    February 8, 2008


6.  Date on which issuer notified:


    February 11, 2008


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


    From 16% - 13%



8. Notified details:

A: Voting rights attached to shares

+--------------+----------------------+--------------------------------------------------+
|Class/type of |Situation previous to |Resulting situation after the triggering          |
|shares        |the Triggering        |transaction                                       |
|              |transaction           |                                                  |
|if possible   +----------+-----------+---------+--------------------+-------------------+
|using the ISIN|Number of |Number of  |Number of|Number of voting    |% of voting rights |
|CODE          |Shares    |Voting     |shares   |rights              |                   |
|              |          |Rights     +---------+----------+---------+----------+--------+
|              |          |           |Direct   |Direct    |Indirect |Direct    |Indirect|
+--------------+----------+-----------+---------+----------+---------+----------+--------+
|GB00B035JB54  |4,026,637 |4,026,637  |N/A      |N/A       |3,226,637|N/A       |13.40%  |
+--------------+----------+-----------+---------+----------+---------+----------+--------+

Total (A+B)

Number of voting rights                % of voting rights
3,226,637                              13.40%


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


    Schroder Investment Management Limited, 3,226,637 13.40%


    Proxy Voting:


10. Name of the proxy holder:


    n/a


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


    n/a


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


    n/a


13. Additional information:

    The shares referred to in section 9 are held in portfolios managed by those
    firms on a discretionary basis for clients under investment management
    agreements.


For further information please contact:

IDMoS plc                                    01382 598440
Graham Lay, Chief Executive Officer

Buchanan Communications
Diane Stewart                                [phone]
Tim Anderson                                 [phone]
James Montgomerie                            [phone]

Nomura Code Securities
Charles Walker                               [phone]





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