Armstrong Whitworth AW.41 Albemarle

The crew left RAF Brize Norton on a supply mission to the French Resistance. While cruising by night, the twin engine aircraft was mistakenly shot down by the pilot of a RCAF fighter and crashed in an open field. All six occupants were killed.
Crew (296th Squadron):
W/O Bruce Stenning, pilot,
F/Sgt Edwin Raymond Abell,
F/Sgt Alan Francis Elwood,
F/Sgt Charles Alfred Hammond,
F/Sgt Frederick Norman Manton,
F/Sgt Ralph Cowham.

While taxiing, the brakes failed. The aircraft veered off taxiway and collided with a transformer. Nobody was hurt while the aircraft was damaged beyond repair.

The twin engine aircraft left Bournemouth-Hurn at 2112LT on 03MAR1944 on a parachute supply mission to the French Resistance. While approaching Châteaudun by night and at low height, the aircraft was shot down and crashed in a field. All five occupants were killed.
Crew:
Flight Officer C. J. Elmer,
Flight Officer J. H. Hood,
Flight Officer T. J. Adamson,
Sergeant E. J. Atkinson,
Sergeant J. Davies.

The crew was performing a training exercise from/to Bournemouth-Hurn Airport. On final approach, the right engine failed due to a lack of oil pressure. The captain abandoned the approach and started a go around. During the second attempt to land, the aircraft turn onto its back and crashed in a field located short of runway. Three crew members were killed while the fourth occupants was injured.

The crew was performing a test flight on this second production series. 45 minutes after departure, the crew informed ground about oil pressure problem on the left engine that was feathered. On a single engine approach to RAF Hucclecote, while at a height of 100 feet in marginal weather conditions (rain falls and gusty winds), the aircraft went out of control and crashed in flames. All four crew members were killed.
Source: http://aviation-safety.net/wikibase/wiki.php?id=141412

On the leg from Hajigabul to Tbilisi of a route proving flight from Moscow-Vnukovo to Tbilisi when the crew decided to land at Yevlakh (Azerbaijan) due to an oil leak on the left engine. But the "Exactor" hydraulic control system of the propellers failed due to a design fault so that propeller pitch increased and the propeller thrust decreased, making it impossible to reach Yevlakh Airfield. The crew made a forced landing near Yevlakh and the aircraft was considered as damaged beyond repair as the tail broke off. All 4 crew members and 3 passengers were slightly injured.

The crew consisted of three members of the Soviet Air Force and a Czech interpreter. En route, the aircraft went out of control, dove into the ground and crashed north of Fearnan. All four occupants were killed.
Crew (305th FTU):
Maj Aleksandr Gruzdin, pilot,
S/Lt Aleksandr Andrejevich Aleksejev, flight engineer,
S/Lt William Dramin.
Passenger:
Sgt Francis Drahovzal.

Just after liftoff from Sverdlovsk-Koltsovo Airport, while climbing, the left engine failed. The pilot completed an emergency landing in a swampy area near the airport. While all five crew members were uninjured, the aircraft was later struck of charge as no spare parts were available.

The crew was performing a training exercise out from RAF Shawbury. En route, one of the engine failed, forcing the pilot to attempt an emergency landing. The airplane belly landed in an open field north of RAF High Ercall and was damaged beyond repair. There were no fatalities.

Shortly after takeoff from Gibraltar-North Front Airport, while climbing at night, the airplane went out of control and crashed into the sea. All six crew members were killed.
Crew:
F/O Francis Bartkiewicz,
W/O Joseph Julius De Marco,
F/Sgt Denison Charles Henderson,
F/Sgt Grant Lawrence Henning,
F/Lt Gordon Webster Thorougood,
F/Sgt Leo Clifford Webster.