Holding in Company

Senior PLC
19 September 2000

                  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 LETTER

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

10p ORDINARY SHARES

10)  Date of transaction



11)  Date company informed

19 SEPTEMBER 2000

12)  Total holding following this notification

59,158,606
               
              
13)  Total percentage holding of issued class following this notification

19.246%

14)  Any additional information



15)  Name of contact and telephone number for queries

L GRANT
01923 714712

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

     Date of Notification ...19.SEPTEMBER 2000........................




LETTER TO:   SENIOR PLC

10p ORDINARY SHARES ('SHARES')

We write to advise you that we, Schroder Investment Management Limited, have an
interest in 54,669,274 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)  22,412,896 shares registered or to be registered in the name of our
     wholly-owned subsidiary nominee company, Schroder Nominees Limited
     (Schroder Nominees),

(ii) 15,264,469 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) 16,991,909 shares neither registered nor to be registered in the name of
      Schroder Nominees Limited. The registration details are shown on the
      schedule A below.

An affiliated company, SIM North America Inc (SIMNA Inc), is managing (a)
portfolio(s) on a discretionary basis holding a further 4,000,000 shares which
are registered or to be registered in the name of Chase Nominees Limited. 
Another affiliated company, Schroder Hermes, is managing 489,332 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 59,158,606 shares, representing some
19.246% 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 interest
it is treated as having 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.


FROM:    PAUL MARTIN
         (COMPLIANCE MANAGER)
         SCHRODERS


                         SCHEDULE A

                 SENIOR ENGINEERING GROUP PLC

                     10p ORDINARY SHARES
   
REGISTRATION                                           AMOUNT

British Coal Staff Superannuation a/c:P               1,827,028
Chase Nominees Limited                                3,428,300
Mineworkers' Pension Scheme a/c: R                      786,280
MSS Nominees Limited a/c: 759371                         85,000
MSS Nominees Limited a/c: 766653                      2,030,000
MSS Nominees Limited a/c: 767412                         70,000
MSS Nominees Limited a/c: 809955                        402,000
MSS Nominees Limited a/c: 846435                        150,000
Nortrust Nominees Limited                             2,300,000
Nortrust Nominees Limited a/c: SRC13                    100,000
RBSTB Nominees Limited                                1,406,520
RBSTB Nominees Limited a/c: AAUKPS                      100,000
RBSTB Nominees Limited a/c: ESPSBEB                     231,781
Schroder Executor & Trustee Co Ltd                      325,000
State Street Nominees Ltd a/c: 4L9Q                     500,000
State Street Nominees Limited a/c: JD19               3,250,000

                                                     16,991,909