 11 Balloon Centre at RAF Pucklechurch, north of Bristol, also came under the command of the RAF Filton station commander.Squadrons stationed at RAF Filton from the beginning of the Second World War included 501 (County of Gloucester) Sqdn (Auxiliary Air Force), now flying Hawker Hurricane Ic fighters, until 10 May 1940 when the Squadron moved to France; and 263 Squadron (reformed on 2 October 1939 at Filton) taking over some of the Gloster Gladiator I biplane fighters previously with No.605 Squadron RAF and still wearing that squadron's code letter (HE).