Notice of Results

Inmarsat plc announces date for release of preliminary full year 2009 results

Inmarsat plc announces that it will report consolidated preliminary full year 2009 results on 9 March 2010. Inmarsat management will host a presentation of the results on 9 March at Inmarsat's offices, 99 City Road, London EC1Y 1AX. The presentation will begin at 9:30am London time. A webcast recording of the presentation will be posted to our website after the event.

To register to attend the results presentation, please contact Laura Furnival at Inmarsat on +44 (0)20 7728 1206, or [email protected].

Inmarsat management will also host a results conference call at 2:00pm London time on 9 March. To access the call please dial +44 (0)20 7162 0025 and quote conference id 858360. A replay of the call will be available for one week after the event. To access the replay please dial +44 (0)20 7031 4064 and enter access code 858360. The call will also be available via a webcast accessible through our website.

For further information contact:

Inmarsat plc:

Laura Furnival +44 (0)20 7728 1206

[email protected]