Notice of Results

Inmarsat plc

Date for release of third Quarter results 2011

Inmarsat announces that Inmarsat plc will issue an interim management statement and Inmarsat Group Limited will release consolidated financial results for the third quarter ended 30 September 2011, on Wednesday, 2 November at 7:00am London time.

Inmarsat management will discuss the third quarter results and other financial and business information in a conference call on Wednesday, 2 November at 2:00pm London time, (United States, 10:00am DST). To access the call please dial +44 (0) 1452 555 566. The conference id for the call is 18369196. The call will be recorded and available for one week after the event. To access the recording, please dial +44 (0) 1452 550 000 and enter the access code 18369196. The call will also be available via a webcast accessible through our website, www.inmarsat.com.

Enquiries:

Laura Slater

Tel: +44 (0)20 7728 1206

[email protected]