Holding in Company

Senior PLC
10 December 2001




                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY

     SENIOR 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

     SHAREHOLDER NAMED IN 2 ABOVE

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

     SEE BELOW

5)   Number of shares/amount of stock acquired.

     -

6)   ( N/A %) of issued Class

7)   Number of shares/amount of stock disposed

     -

8)   ( N/A %) of issued Class

9)   Class of security

     ORDINARY SHARES OF 10p EACH

10)  Date of transaction

     -

11)  Date company informed

     10 DECEMBER 2001

12)  Total holding following this notification

     55,790,478
               
13)  Total percentage holding of issued class following this notification

     18.150%

14)  Any additional information



15)  Name of contact and telephone number for queries

     Y BARNES - 01923-714716

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

     Date of Notification 10 DEC 2001


LETTER TO:  SENIOR PLC

10p ORDINARY SHARES ('SHARES')

We write to advise you that we, Schroder Investment Management Limited, have an
interest in 51,290,478 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)  21,096,543 shares registered or to be registered in the name of our
     wholly-owned subsidiary nominee company, Schroder Nominees Limited
     (Schroder Nominees),

(ii) 13,265,579 shares held in (a) unit trust(s) operated and managed by
     another wholly-owned subsidiary, Schroder Unit Trusts Limited (SUTL), and
     registered or to be registered in the name of Chase Nominees Limited.

(iii) 16,928,356 shares neither registered nor to be registered in the name of
      Schroder Nominees Limited.  The registration details are shown on the
      schedule A.

An affiliated company, SIM North America Inc (SIMNA Inc.) is managing (a) 
portfolio(s) on a discretionary basis holding a further 4,500,000 shares which 
are registered or to be registered in the name of Chase Nominees Limited.

We believe that we and our subsidiary and affiliated companies are therefore 
interested in an overall aggregate of 55,790,478 shares,representing some 
18.150% of the total number of shares in issue, namely 307,380,913 shares.

This notification is made to you:

(a) in respect of our interest as investment managers and also by virtue of the
    fact that we are the parent company of SUTL.

(b) on behalf of SIMNA Inc. 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 and ourselves.


LETTER FROM:    ALISON DUNN
                REGULATORY REPORTING OFFICER


                                    SCHEDULE A

                            SENIOR ENGINEERING GROUP PLC

                              10p ORDINARY SHARES

REGISTRATION                                             AMOUNT

Bank of New York                                      1,871,100
British Coal Staff Superannuation a/c: P              2,177,028
Chase Nominees                                        1,344,000
Mineworkers' Pension Scheme a/c: R                      936,280
MSS Nominees Limited a/c: 809955                        402,000
MSS Nominees Limited a/c: 846435                      1,305,100
Nortrust Nominees Limited                             1,650,000
RBSTB Nominees Limited                                4,459,400
State Street Nominees Limited                           658,000
State Street Nominees Limited a/c: 5H57               1,840,500
State Street Nominees Limited a/c: JD19                 284,948
                                                     ----------
                                                     16,928,356
                                                     ==========