Holding(s) in Company

Safestore Holdings PLC 16 April 2007 TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: Safestore Holdings PLC 2. Reason for the notification (please place an X inside the appropriate bracket /s): An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached. 3. Full name of person(s) subject to the notification obligation: Henderson Global Investors Ltd 4. Full name of shareholder(s) (if different from 3.) : N/A 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 6. Date on which issuer notified: 29 March 2007 7. Threshold(s) that is/are crossed or reached: 7% 8. Notified details: A: Voting rights attached to shares Class/type of shares if possible Situation previous to the Triggering transaction using the ISIN CODE Number of shares Number of voting Rights Ordinary 1p shares 12,742,450 12,742,450 GBOOB1N7Z094 Resulting situation after the triggering transaction Class/type of shares if Number of shares Number of voting rights % of voting rights possible using the ISIN CODE Direct Direct Indirect Direct Indirect Ordinary 1p shares 13,544,450 13,544,450 7.24 GBOOB1N7Z094 B: Financial Instruments Resulting situation after the triggering transaction N/A Total (A+B) Number of voting rights % of voting rights 13,544,450 7.24 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable : 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: Stuart Beavers 15. Contact telephone number: 020 8732 1500 16 April 2007 END This information is provided by RNS The company news service from the London Stock Exchange