Holding(s) in Company

Senior PLC 12 February 2008 TR-1 (i): NOTIFICATION OF MAJOR INTERESTS IN SHARES -------------------------------------------------- 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached (ii): Senior plc 2. Reason for the notification: An acquisition or disposal of Voting Rights 3. Full name of person(s) subject to the notification obligation (iii): JP Morgan Chase & Co. 4. Full name of shareholder(s) (if different from 3.) (iv): JP Morgan Investment Management Inc. JF Asset Management Limited JP Morgan Asset Management (Japan) Limited JP Morgan Asset Management (UK) Limited 5. Date of the transaction (and date on which the threshold is crossed or reached if different) (v): 8 February 2008 6. Date on which issuer notified: 12 February 2008 7. Threshold(s) that is/are crossed or reached: 5% 8. Notified details: A: Voting rights attached to shares Class/type Situation previous to the Resulting situation after the triggering of shares Triggering transaction (vi) transaction (viii) Number of Number of Number of Number of Voting % of Voting Shares Voting Rights Shares Rights Rights (viii) Direct Indirect (xi) Direct Indirect (x) GB0007958233 19,525,591 19,525,591 15,713,546 15,713,546 4.02 B: Financial Instruments Resulting situation after the triggering transaction (xii) Type of Expiration Exercise / Number of voting rights that may % of financial Date Conversion be acquired if the instrument is voting instrument (xiii) Period / Date exercised / converted. rights (xiv) TOTAL (A+B) Number of voting rights % of voting rights 15,713,546 4.02 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable (xv): Total Disclosable Holding for JP Morgan Chase & Co. : 15,713,546 (4.02%) JP Morgan Investment Management Inc. JF Asset Management Limited JP Morgan Asset Management (Japan) Limited JP Morgan Asset Management (UK) Limited Proxy Voting: 10. Name of the proxy holder: 11. Number of voting rights proxy holder will cease to hold: 12. Date on which proxy holder will cease to hold voting rights: 13. Additional information: 14. Contact name: A Bodenham, Company Secretary, Senior plc 15. Contact telephone number: 01923 714745 Annex to Notification Of Major Interests In Shares (xvi) A: Identity of the person or legal entity subject to the notification obligation Full name (including legal form for legal entities): Senior plc Contact address (registered office for legal entities): 59/61 High Street, Rickmansworth, WD3 1RH. Phone number: 01923 714745 Other useful information (at least legal representative for legal persons): B: Identity of the notifier, if applicable (xvii) Full name: A Bodenham Contact address: 59/61 High Street, Rickmansworth, WD3 1RH. Phone number: 01923 714745 Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation): C: Additional information : This information is provided by RNS The company news service from the London Stock Exchange LUUSVRWURUAAR

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