The oldest airworthy Spitfire in existence is operated by the Battle of Britain Memorial Flight. Fittingly, this aircraft saw combat during the Battle of Britain in 1940, serving with 603 (City of Edinburgh) Squadron, which was then based at RAF Hornchurch. The aircraft is currently painted up to represent a Mk Ia called "Blue Peter", which was the personal mount of 603 Sqn's CO, Sqn Ldr George Denholm DFC.