Holding(s) in Company

Senior PLC 15 May 2002 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) ( - %) of issued Class 7) Number of shares/amount of stock disposed - 8) ( - %) of issued Class 9) Class of security ORDINARY SHARE OF 10p EACH 10) Date of transaction - 11) Date company informed 15 MAY 2002 12) Total holding following this notification 59,407,982 13) Total percentage holding of issued class following this notification 19.327% 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 15 MAY 2002 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 54,907,982 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) 22,720,919 shares registered or to be registered in the name of our wholly-owned subsidiary nominee company, Schroder Nominees Limited (Schroder Nominees), (ii) 13,241,387 shares held in (a) unit trust(s) operated and managed by an affiliated company, Schroder Unit Trusts Limited (SUTL). 10,548,287 shares are registered or to be registered in the name of Chase Nominees Limited, while the remaining 2,693,100 shares are registered or to be registered in the name of MSS Nominees Limited a/c: 846435. (iii) 18,945,676 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 59,407,982 shares, representing some 19.327% of the total number of shares in issue, namely 307,383,211 shares. This notification is made to you: (a) in respect of our interest as investment managers, (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, SUTL and ourselves. LETTER FROM SCHRODER INVESTMENT MANAGEMENT LIMITED SCHEDULE A SENIOR PLC 10p ORDINARY SHARES REGISTRATION AMOUNT Bank of New York 2,421,100 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 Morgan Nominees Limited 2,000,000 Nortrust Nominees Limited 2,102,568 RBSTB Nominees Limited 5,064,200 State Street Nominees Limited 658,000 State Street Nominees Limited a/c: 5H57 1,840,500 ---------- 18,945,676 ========== This information is provided by RNS The company news service from the London Stock Exchange END

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