INVENSYS PLC

(the 'Company')

VOTING RIGHTS AND CAPITAL

In conformity with the Disclosure and Transparency Rules, we would like to notify the market of the following:

At close of business on 31 August 2009 the Company's issued capital consisted of 806,152,907 Ordinary shares of 10p each.

Therefore, the total number of current voting rights in the Company was 806,152,907.

The above figure (806,152,907 Ordinary shares) may be used by shareholders as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FSA's Disclosure and Transparency Rules.

Name of contact and telephone number for queries: Steve Devany, Head of Corporate Communications, 020 7821 3758.

Name of Company official responsible for making notification: Jessica Wildgoose, Secretarial Assistant. 

Date of notification: 16 September 2009