Hobby Master HA7604 Supermarine Spitfire PR Mk XIX Royal Air Force PM631 No203 Squadron, Advanced Flying School, 1949

Built in November 1945 as a high altitude photo reconnaissance aircraft with a Griffon 66 engine and pressurised cockpit, Spitfire PM631 (Mk PRXIX) PM631 was too late to see operational service in WWII. She was delivered to the RAF in 1946 and issued to 203 Advanced Flying School in May 1949. Modified for meteorological work, she was leased to Short Bros and was flown by civilian pilots with the Temperature and Humidity Monitoring (THUM) Flight based at Hooton Park and Woodvale. On 11 July 1957, in formation with Spitfires PS853 and PS915, the aircraft was flown to Biggin Hill to form the Historic Aircraft Flight which later developed into the BBMF. Unlike the other two Mk XIXs that spent time as gate guardians, PM631 has remained in flying condition with the Flight and is the BBMFGÇÖs longest serving aircraft, with 2008 being her 51st year of continuous service on display duties.