Whitleys setting out from RAF Driffield on yet another leaflet raid, on April 27, 1940.

A Whitley takes off and heads out on a leaflet raid.

Lockheed Hudson I T9303 of 206 Sqn at RAF Bircham Newton on September 3, 1940, 'exactly a year to the day after Britain declared war on Germany.

Hudson I T9303, of 206 Squadron, RAF, with flaps down comes in to land at RAF Bircham Newton on September 3, 1940.

12 Lockheed Hudsons bound for Britain and the RAF, being loaded aboard ship at San Pedro, California in May 1939. All the aircraft appear to be in the N serial range.

Another view of Hudson I T9303 Littel Gel II at RAF Bircham Newton in September 1940. This Hudson went missing on a reconnaissance flight on October 16, 1940.

The crew of Hudson I T9303 pause for Flight’s camera before climbing aboard their aircraft. RAF Hudsons were initially used to keep a wary watch on German surface raiders in the North Sea. It was a Hudson of 224 Sqn that became the first RAF machine to shoot down an enemy aircraft in World War Two.