Transaction in Own Shares

Caledonia Investments plc

Transaction in Own Shares

Caledonia Investments plc ("Caledonia") announces that on 12 May 2010 it purchased from J.P. Morgan Securities Ltd 3,000 of its own ordinary shares of 5p each at an average price of 1615.6667p per share. The purchased shares will be held as treasury shares. 

Following the above purchase, Caledonia holds 566,230 of its ordinary shares in treasury and has 58,228,551 ordinary shares in issue (excluding treasury shares).

For further information, please contact:

Graeme P Denison

Company Secretary

Caledonia Investments plc

Telephone +44 20 7802 8080

12 May 2010