Awards Recognize Outstanding Achievement in the Satellite Sector

London, UK – September 10, 2009 – Inmarsat, the global leader in mobile satellite communications, has been selected as MSS Operator of the Year at the 6th Annual Awards for Excellence in Satellite Management. Presented each year at the World Satellite Business Week, the awards recognize outstanding achievement in the satellite industry and are among the industry’s highest tribute. Sponsored by Euroconsult, a global satellite research and analyst firm, award winners are selected from a jury of industry experts from Euroconsult, Space News and Satellite Finance.

“The Awards for Excellence in Satellite Management recognize companies who have made a particularly strong impact on the satellite industry through their vision,  growth, profit or innovation,” said Pacôme Revillon, CEO of Euroconsult. “This annual tradition at the World Satellite Business Week allows the industry to celebrate their accomplishments, and the overall success of the industry.”

“We thank Euroconsult for its vote of confidence in Inmarsat and our great team as we celebrate 30 years of operation,” said Perry Melton, Chief Operating Officer for Inmarsat. “Our new network is complete, as are our funding requirements. We look forward to servicing our global customers in the decades ahead where other networks cannot reach – on land, sea and air – confident in our reliability.”

About Inmarsat

Inmarsat plc (LSE: ISAT) is the leading provider of global mobile satellite communications. Since 1979, Inmarsat has been providing reliable voice and high-speed data communications to governments, enterprises and other organizations, with a range of services that can be used on land, at sea or in the air. The company’s services are delivered through a global network of more than 500 distribution partners and service providers operating in 180 countries. For the year ended 31st December 2008, Inmarsat plc had total revenue of US$996.7 million (2007: US$576.5 million) with an EBITDA of US$531.2 million (2007: US$388.1 million). For more information, please visit www.inmarsat.com.

For further information, please contact:

Suzanne Yap

Rice Communications on behalf of Inmarsat

Tel: +65 6227 1550 / +65 8522 3221

Email: suzanne.yap@ricecomms.com

Shruti Soni

Rice Communications on behalf of Inmarsat

Tel: +91 98733 54750

Email: shruti.soni@ricecomms.com