Announcement of date for first quarter results

27 April 2010

Inmarsat announces date for first quarter results

Inmarsat announces that Inmarsat plc will issue an interim management statement and Inmarsat Group Limited will release consolidated financial results for the first quarter ended 31 March 2010, on Tuesday, 11 May at 7:00am London time.

Inmarsat management will discuss the first quarter results and other financial and business information in a conference call on Tuesday, 11 May at 2:00pm London time, (United States, 9:00am EST). To access the call please dial +44 (0)20 7162 0025. The conference id for the call is 863154. The call will be recorded and available for one week after the event. To access the recording, please dial +44 (0)20 7031 4064 and enter the access code 863154. The call will also be available via a webcast accessible through our website, www.inmarsat.com .

Enquiries:

Laura Furnival

Tel: +44 (0)20 7728 1206

laura_furnival@inmarsat.com