Holding in Company

Senior PLC
21 June 2001


                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY

     SENIOR PLC

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

     SCHRODERS 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 LETTER 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

     21 JUNE 2001

12)  Total holding following this notification

     57,291,851
              
13)  Total percentage holding of issued class following this notification

     18.639%

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    21 JUNE 2001


LETTER TO SENIOR PLC - DATED 20 JUNE 2001

SENIOR PLC 
10p ORDINARY SHARES ('SHARES')

We write to advise you that we, Schroder Investment Management Limited, have an
interest in 52,340,679 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)   20,772,868 shares registered or to be registered in the name of our       
      wholly-owned subsidiary nominee company, Schroder Nominees Limited        
      (Schroder Nominees),

(ii)  14,003,906 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) 17,563,905 shares neither registered nor to be registered in the name of  
      Schroder Nominees Limited. The registration details are shown on 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.

Another affiliated company, Schroder Hermes, is managing 451,172 shares in (a)
portfolio(s) on a passive (index tracker) basis for clients under investment
management agreements. These shares 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 57,291,851 shares, representing some
18.639% 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, Schroder Hermes 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, Schroder Hermes and ourselves.


LETTER FROM SCHRODER INVESTMENT MANAGEMENT LIMITED


                           SCHEDULE A
                    SENIOR ENGINEERING GROUP PLC 
                        10p ORDINARY SHARES
                      
REGISTRATION                                          AMOUNT

Bank of New York                                     1,150,000
British Coal Staff Superannuation a/c: P             2,177,028
Chase Nominees Limited                               1,520,047
Mineworkers' Pension Scheme a/c: R                     936,280
MSS Nominees Limited a/c: 766653                     1,579,000
MSS Nominees Limited a/c: 767412                        70,000
MSS Nominees Limited a/c: 809955                       402,000
Nortrust Nominees Limited                            2,300,000
RBSTB Nominees Limited                               2,259,550
RBSTB Nominees Limited a/c: AAUKPS                     100,000
State Street Nominees Ltd a/c: 4L9Q                    500,000
State Street Nominees Limited a/c: JD19              3,250,000
State Street Nominees Limited a/c: 5H57              1,320,000

                                                    17,563,905