sentences:  After disbandment in 1944, this unit became the Special Projectile Flight of the Royal Aircraft Establishment, remaining at Heston.During the war, units temporarily based at Heston included RAF Polish fighter squadrons 302, 303, 306, 308, 315, 316, 317, using mostly Spitfire Vs and Hurricanes.Other units included 515 Sqn, 129 Sqn, 116 Sqn, No.