A Short Sunderland Mk 1 at its base in the UK.  Unit or location unknown. The only listing for these squadron codes I could find was a RCAF Bomber squadron which obviously this is not.  All squadron codes were changed when war was declared and the codes would have been available for reuse so this might be a pre-war photo.  The overall camouflage scheme is interesting as it differs from the familiar mainly white scheme which helped hide the aircraft from U-boat lookouts until it was too late.

Sunderland 1

Factory tests of an American-built bomber Glenn Martin Baltimore, like on the Glenn L. Martin Company’s factory at Cleveland, Ohio, before the aircraft’s ferry from United States to Mediterranean Theater via Gold Coast, today Ghana (note the glass nose still immaculate). The aircraft has already the RAF camouflage for the North African sector. The first production series of this versatile twin engine aircraft, Company’s name M-187, was for the French Air Force, but after the fall of France, the production series was diverted to Great Britain which received two other substantial batches under the Lend Lease Act. The aircraft, named Baltimore in the British service, was, de facto, employed only by the RAF and other Commonwealth’s air forces (Australia and South Africa) and only in the Mediterranean theater (North Africa and Italy). Some RAF’s Baltimore was switched to Greek Air Force and, second half 1944, to Italian co-belligerent Air Force. The picture now posted is the color cover of the Glenn Martin’s home magazine, October 1943. Victor Sierra

The Baltimore’s nose

British troops of the 6th Airborne Division unload a jeep and other equipment from a glider in Normandy. - Far cheaper than airplanes - yet almost defenseless - the gliders were invaluable to quartermasters, but could be deadly as infantry carriers.