S/L Kellet and F/L Forbes both force-landed, and were wounded slightly, while Sgt Karubin bailed out wounded, S/L Krasnodebski was severely burned and three other Hurricanes were damaged.The squadron claimed five Bf 109s (of JG 27 and JG 52), a Do 17 and a Heinkel He 111.Its success in combat can be mainly attributed to the years of extensive and rigorous pre-war training many of the long-serving Polish veterans had received in their homeland, far more than many of their younger and inexperienced RAF comrades then being thrown into the battle.Tactics and skill also played a role; on one occasion, No.Just six aircraft were serviceable during the afternoon, engaging a raid of 15 Ju 88s.Two bombers were brought down before the escort intervened, and a Bf 109 was also claimed. On 5 October 1940, Polish pilots claimed five Bf 110s and four Bf 109s, though P/O Januszewicz was killed.F/O Urbanowicz claimed four German aircraft during the day. (Eprobungsgruppe 210 lost two Bf 110s Jabos and JG 3 and JG 53, a Bf 109 each).On 30 September 1940, F/O Urbanowicz once again claimed four victories, additionally a Do 17 was brought down by P/O. A fight over the Thames Estuary on 7 October saw claims for three Bf 109s of LG 2.
In a dogfight over Kent, "A" Flight claimed four confirmed and two probable victories over Messerschmitt Bf 109s, possibly of LG 2.On 11 October 1940, the squadron was transferred for a rest to Leconfield in No.12 Group, ending its participation in the Battle of Britain. 303 Squadron claimed the largest number of aircraft destroyed of the 66 Allied fighter squadrons engaged in the Battle of Britain, even though it joined the fray two months after the battle had begun.It had a distinguished combat record and was disbanded in December 1946. 303 (Polish) Squadron was from 2 August 1940 based at RAF Northolt, and became operational on 31 August.Its initial cadre was 13 Officer and 8 NCO pilots and 135 Polish ground staff.