Began life in Nov 1989 as the South East Thames Air Ambulance, operating a single Twin Squirrel from Dec 1989, from Rochester. It operated the Kent service from Marden until 2007 when it became part of KSSAAT.
In Apr 2017, signed a 25 year lease to continue Surrey & Sussex operations from Redhill, despite previous announcements from KSSAA that it intended to centralise all operations at Old Hay, near Marden.