IMI PLC — Report Publication Announcement 2011

Mar 29, 2011

IMI plc Lakeside Solihull Parkway Birmingham Business Park Birmingham B37 7XZ

Registered in England and Wales No. 714275

29 March 2011

Dear Shareholder

Electronic shareholder documentation

In order to reduce both the environmental and financial cost of our mailings, we have previously asked shareholders to advise if they would like to receive hard copies of shareholder documentation. Our records indicate that you did not request to receive hard copy documentation and we are therefore writing to advise that the following documents are now available to view and download on the IMI plc website www.imi.plc.uk/investors/ (click on Annual reports):

• Annual Report 2010
• Notice of annual general meeting

The annual general meeting of IMI plc will be held at the Hilton Birmingham Metropole Hotel, National Exhibition Centre, Birmingham on Friday 6 May 2011 at 12 noon.

Proxy voting

If you are not able to attend the meeting and vote in person, you can appoint a proxy to attend and vote on your behalf. The resolutions to be proposed at the annual general meeting are as described on the proxy card enclosed with this letter. A proxy may be appointed by completing and posting back the enclosed prepaid proxy card or electronically through the Sharevote website by visiting www.sharevote.co.uk. To use the Sharevote service you will need your voting ID, task ID and shareholder reference number (all of which are printed on the enclosed proxy card). Full details of the procedure are given on the website. To be valid, proxy appointments must be received by delivery to Equiniti, the Company's Registrar, or made electronically through the Sharevote website, by 12 noon on Wednesday 4 May 2011.

If you have any questions or require support in using the Sharevote website, please call Equiniti on 0871 384 2916*. You should also contact Equiniti if you wish to change your decision on how you wish to receive shareholder documents. When contacting Equiniti you will need your shareholder reference number, which is printed on the enclosed proxy card.

Changes to voting this year

The Board has decided, in line with best practice, to move to voting on a poll at the annual general meeting, rather than a show of hands. Poll voting at the meeting will be conducted using an electronic system called VoteNow provided by Equiniti. The Board believes that this will result in a more accurate reflection of the views of shareholders by ensuring that every vote is recognised, including the votes of all shareholders who are unable to attend the meeting but who appoint a proxy for the meeting. On a poll, each shareholder has one vote for every share held. Shareholders attending the meeting will be given full instructions on how to use the VoteNow system.

Yours sincerely

Norman B M Askew Chairman IMI plc