Holding(s) in Company

RNS Number:3222M
AEA Technology PLC
13 June 2003

                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY
AEA TECHNOLOGY PLC


2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST
SCHRODER INVESTMENT MANAGEMENT LIMITED


3)   Please state whether notification indicates that it is in respect of 
     holding of the Shareholder named in 2 above or in respect of a 
     non-beneficial interest or in the case of an individual holder if it is a
     holding of that person's spouse or children under the age of 18
SEE 2


4)   Name of the registered holder(s) and, if more than one holder, the 
     number of shares held by each of them.
SEE LETTER BELOW


5)   Number of shares/amount of stock acquired.
NOT KNOWN


6)   ( NOT KNOWN %) of issued Class


7)   Number of shares/amount of stock disposed
 -


8)   ( - %) of issued Class


9)   Class of security
ORDINARY #0.1222P


10)  Date of transaction
NOT KNOWN


11)  Date company informed
13/6/03


12)  Total holding following this notification
14,735,828

               
13)  Total percentage holding of issued class following this notification
21.662


14)  Any additional information
SEE BELOW


15)  Name of contact and telephone number for queries
K. RUSSELL
01235 433195


16)  Name and signature of authorised company official responsible for 
     making this notification

     Date of Notification 13/6/2003


Letter to AEA Technology Plc
Dated 13 June 2003

10P ORDINARY SHARES ("SHARES")

We write to advise you that we, Schroder Investment Management Limited, have an 
interest in 13,238,837 shares which are held in portfolios managed by us on a 
discretionary basis for clients under investment management agreements.

Included in this figure are:-

(i)    982,542 shares registered or to be registered in the name of our 
       wholly-owned subsidiary nominee company, Schroder Nominees Limited 
       (Schroder Nominees),

(ii)   6,250,001 shares held in (a) unit trust(s) operated and managed by an 
       affiliated company, Schroder Unit Trusts Limited (SUTL), and registered 
       or to be registered in the name of Chase Nominees Limited.

(iii)  6,006,294 shares neither registered nor to be registered in the name of 
       Schroder Nominees Limited. The registration details are shown on enclosed 
       schedule A.

An affiliated company, Schroder Investment Management North America Inc (SIMNA 
Inc), is managing a portfolio holding a further 1,496,991 shares. These shares 
are registered or to be registered in the name of Chase Nominees Limited.

We believe that we, our subsidiary and affiliated company are therefore 
interested in an overall aggregate of 14,735,828 shares, representing some 
21.662% of the total number of shares in issue, namely 68,027,475.

This notification is made to you:-

(a) in respect of our interest as investment managers,

(b) on behalf of SIMNA Inc, SIMNA Ltd and SUTL in relation to the interests they 
    are treated as having respectively under the Companies Act 1985 (the Act), 
    and

(C) on behalf of Schroders plc., our holding company, which is treated as having 
    an interest in all of the above shares under the Act by virtue of its 
    ownership of SIMNA Inc. SUTL and ourselves.


 
                         SCHEDULE A 
                      AEA TECHNOLOGY PLC 
                     10P ORDINARY SHARES
 
REGISTRATION                                         AMOUNT

British Coal Staff Superannuation a/c: P          2,122,406 
Chase Nominees Limited                              607,689 
Chase Manhattan Bank                                209,630 
Imperial Pensions Nominees Limited                  695,454 
Mineworkers' Pension Scheme a/c: R                1,710,368 
Morgan Nominees Ltd                                  90,818 
Nortrust Nominees Ltd                               360,728 
Nutraco Nominees Ltd a/c: GWPPMPS                   119,454 
RBSTB Nominees Limited                               89,747

                                                  6,006,294
     

Letter from Schroders Investment Management Limited


                      This information is provided by RNS
            The company news service from the London Stock Exchange

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