Holding in Company

Senior PLC
27 February 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 ATTACHED LETTER (BELOW)

5)   Number of shares/amount of stock acquired.

6)   (    %) 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

27 FEBRUARY 2001

12)  Total holding following this notification

57,908,038
               
            
13)  Total percentage holding of issued class following this notification

18.839%

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

L GRANT

     Date of Notification ...  27 FEBRUARY 2001



LETTER TO: SENIOR PLC


SENIOR PLC
10P ORDINARY SHARES ('SHARES')

We write to advise you that we, Schroder Investment Management Limited, have an
interest in 552,689,019 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)  22,615,766 shares registered or to be registered in the name of our
wholly-owned subsidiary nominee company, Schroder Nominees Limited (Schroder
Nominees).

(ii)  14,179,953 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) 15,893,300 shares neither registered nor to be registered in the name of
Schroder Nominees Limited.  The registration details are shown on schedule A
(below).

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

Another affiliated company, Schroder Hermes, is managing 719,019 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 57,908,038 shares, representing some
18.839% 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.

We shall be grateful if you will kindly let us have a copy of your notification
to the Stock Exchange and if you will also confirm the total number of shares
currently in issue.

In addition please let us know whether your company or any of its subsidiaries
is either:-

(i) authorised by any of the Financial Services Act 1986 (FSA) regulators,
namely IMRO, PIA and SFA, or by any regulator in the European Union outside the
United Kingdom, or

(ii) a listed money market institution under Section 43 FSA, or

(iii) an authorised insurance company.



LETTER FROM: SCHRODER INVESTMENT MANAGEMENT LIMITED




                              SCHEDULE A
                     
                      SENIOR ENGINEERING GROUP PLC

                         10p ORDINARY SHARES


REGISTRATION                                                      AMOUNT
 
British Coal Staff Superannuation a/c: P                       2,177,028
Chase Nominees Limited                                         2,500,000
Mineworkers' Pension Scheme a/c: R                               936,280
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                                 155,394
Nortrust Nominees Limited                                      2,300,000
Nortrust Nominees Limited a/c: SRC13                              63,500
RBSTB Nominees Limited                                         1,267,000
RBSTB Nominees Limited a/c: AAUKPS                               100,000
RBSTB Nominees Limited a/c: ESPSBEB                              142,098
State Street Nominees Ltd a/c: 4L9Q                              500,000
State Street Nominees Limited a/c: JD19                        3,250,000

                                                              15,893,300