Transaction in own shares

IMI PLC
21 September 2005

FOR IMMEDIATE RELEASE


IMI PLC


21 September 2005


IMI plc: Transaction in own shares

IMI plc announces that it has today purchased through Citigroup 200,000 ordinary
shares at a price of 430.87 pence per share. The purchased shares will all be
held as treasury shares. Following the above purchase, IMI plc holds 9,930,000
ordinary shares as treasury shares. The total number of ordinary shares in issue
(excluding shares held as treasury shares) is 347,628,655.


Contact:
John O'Shea                         0121 717 3780




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