"American Aircraft in Royal Air Force Service 1939-1945- Douglas Db-7 Havoc." Havoc Mark I (Intruder), BJ496, in flight off the Irish coast after conducting experimental night camouflage trials with the Royal Aircraft Establishment, flying from Aldergrove, County Antrim. BJ496 had briefly served in the intruder role with No. 23 Squadron RAF the previous February, and was subsequently modified as a Turbinlite aircraft, flying with Nos. 1422, 1451 and 1454 Flights, before crashing during a searchlight practice at Colerne on 23 October 1941.