Transaction in own shares

IMI PLC
23 September 2005



FOR IMMEDIATE RELEASE



IMI PLC



23 September 2005



IMI plc: Transaction in own shares



IMI plc announces that it has today purchased through Citigroup 90,000 ordinary
shares at a price of 429 pence per share. The purchased shares will all be held
as treasury shares. Following the above purchase, IMI plc holds 10,120,000
ordinary shares as treasury shares. The total number of ordinary shares in issue
(excluding shares held as treasury shares) is 347,446,668.



Contact:

John O'Shea                         0121 717 3780




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