Holding(s) in Company

21 Mar 2011 16:18

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi 1. Identity of the issuer or the underlying Interserve Plc issuer of existing shares to which voting rights are attached: ii 2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights An acquisition or disposal of qualifying financial instruments which

may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights Other (please Records update x specify):

3. Full name of person(s) subject to Henderson Global Investors Limited the notification obligation: iii

4. Full name of shareholder(s) (if See section 9 different from 3.):iv 5. Date of the transaction and date on which the threshold is crossed or reached: v 6. Date on which issuer notified: 18 March 2011 7. Threshold(s) that is/are crossed 5% or reached: vi, vii 8. Notified details:A: Voting rights attached to shares viii, ixClass/type of Situation previous Resulting situation after

shares to the triggering the triggering transaction transaction if possible Number Number Number Number of % of voting using of of of voting rights x

the ISIN CODE Shares Voting shares rights

Rights Direct Direct Indirect Direct Indirect xi xii ORD GBP0.1 Below 5% Below 5% 9,898,462 7.86%

GB0001528156 B: Qualifying Financial Instruments Resulting situation after the triggering transaction

Type of financial Expiration Exercise/ Number of voting % of voting

instrument date xiii Conversion Period rights that may be rights xiv acquired if the instrument is exercised/ converted.

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of Exercise Expiration Exercise/ Number of voting % of voting financial price date xvii Conversion rights instrument rights xix, xx instrument period refers to xviii Nominal Delta

Total (A+B+C)

Number of voting rights Percentage of voting rights 9,898,462 7.86%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: xxi

Lowland Investment Trust, The City of London Investment Trust, Henderson Smaller Companies Investment Trust, Witan Investment Trust and Henderson GlobalInvestors 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: The previous disclosure of 18/03/10 did

not include the amount of shares held within our managed Investment Trusts as these were reported separately at the time. This report contains our entire holding within Interserve. 14. Contact name: Mr Trevor Bradbury 15. Contact telephone number: 0118 932 0123