Holding in Company

Senior PLC 12 October 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 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 12 OCT 2001 12) Total holding following this notification 58,360,148 13) Total percentage holding of issued class following this notification 18.986% 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 L GRANT GROUP COMPANY SECRETARY Date of Notification 12 OCT 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 53,860,148 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) 20,582,443 shares registered or to be registered in the name of our wholly-owned subsidiary nominee company, Schroder Nominees Limited (Schroder Nominees), (ii) 13,595,697 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) 19,682,008 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. We believe that we and our subsidiary and affiliated companies are therefore interested in an overall aggregate of 58,360,148 shares, representing some 18.986% 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, 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 1,871,100 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 3,667,000 State Street Nominees Limited 739,000 State Street Nominees Limited a/c: 4L9Q 500,000 State Street Nominees Limited a/c: 5H57 1,840,500 State Street Nominees Limited a/c: JD19 3,250,000 19,682,008

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