Air Ambulance Kent Surrey Sussex (KSS) is an organisation providing emergency medical services through the provision of a helicopter air ambulance covering the three English counties of Kent, Surrey, East Sussex and West Sussex, which are served by the South East Coast Ambulance Service. The service is funded by the Kent, Surrey & Sussex Air Ambulance Trust which is a registered charity, raising money from public and private donations in excess of £15 million every year.The charity's aircraft are based and maintained at Redhill Aerodrome in Surrey. Its headquarters and forward operating base are at Rochester Airport in Kent.