<hi style=afpcap>The Lockheed produced Hudson was supplied to the Royal Air Force during the early stages of World War Two. The design proved to be highly succesful enabling Lockheed to refine the aircraft in line with the requirements of the RAF. The Hudson had been based on the Lockheed model 14, with the manufacturer producing the model 18 as the Ventura. The new aircraft became part of the Lend-Lease programme with the US designation B-34 assigned. The first order for 200 was supplied to Britain, but the second batch of 250 which were subcontracted to the Lockheed Vega production line were retained by the Army for coastal patrols. The B-34B was produced as a navigational trainer. A version powered by Wright engines was designated the O-56 with 550 being ordered, although only 18 were delivered, with these using the revised designation B-37.</hi>
