After the outbreak of
war, No. 112 Squadron was sent to Ottawa in February 1940, and re-equipped with the
Westland Lysander, stocks of which were left behind when No. 110 Squadron was posted overseas. The squadron was likewise sent to Europe on 30 June 1940 with the intention to have No. 112 Squadron become part of the
British Expeditionary Force but the decision was made that Army Co-operation squadrons were not needed in France, and the squadron was re-deployed to coastal defence duties in England. On 11 December 1940, the squadron was re-designated
No. 2 Squadron RCAF and equipped with the
Hawker Hurricane Mk. I. Finally, in March 1941, while stationed at
RAF Digby, Lincolnshire, England the squadron was renumbered as No. 402 Squadron RCAF to comply with Article XV and re-equipped with the
Hurricane Mk. II the following May and then Hurricane Mk.IIBs in June. With these, it began training to become the first "Hurribomber" unit, commencing operations in this role in November 1941, carrying pairs of 250 lb bombs beneath the wings. In March 1942, the Squadron resumed its fighter role moving to
RAF Colerne and converting to
Supermarine Spitfire Mk.Vbs. Cross-Channel Ramrod and Rodeo
sorties from various bases followed, notably
RAF Kenley and
RAF Redhill, until August when it received
Spitfire Mk.IXs, employing these over
Dieppe on 19 August 1942. A move to
RAF Digby in March 1943, brought a return to Spitfire Mk.Vs, which were flown from a variety of airfields right up to and during the
Battle of Normandy, when it operated from a temporary airfield at
Horne, Westhampnett (now
Chichester/Goodwood Airport) and
RAF Merston. For
Operation Overlord (the Allied invasion of Normandy in June 1944) it operated as part of
Air Defence of Great Britain, though under the operational control of
RAF Second Tactical Air Force mainly in a
fighter-bomber role. Spitfire Mk.IXs were again received in July, but their stay was brief, as in early August 1944, a move was made to
Hawkinge where the Squadron re-equipped with the
Griffon-engine Spitfire Mk. XIVs and operations against the
V-1 flying bombs were commenced, with five victories confirmed. Following a change back to operations over Europe on 25 August 1944, including reconnaissance and bomber escort, 402 continued to see regular action against
Luftwaffe aircraft; 19 victories being claimed in April 1945 alone. At the end of September 1944, the Squadron was posted to the
2nd Tactical Air Force (TAF) in
Belgium, joining
No. 125 Wing RCAF. A move to
Grave in the
Netherlands followed where the first victories were claimed over
Nijmegen on 6 October 1944. In December, the Squadron joined
No. 126 Wing RCAF to fly alongside the Wing's Spitfire Mk. IXs. The ending of the hostilities found the unit on German soil at
Wunstorf with total victories for the war of 49½ aircraft. The code letters carried by the Squadron during this period were "AE". The Squadron disbanded at
RAF Fassberg, Germany on 10 July 1945. ==Wartime aircraft==