Llandwrog AFB

The crew was completing a training flight in the region of Barmouth, Wales. While cruising at a height of 1,000 feet, the twin engine aircraft hit the slope of Mt Bwlch y Llan and was destroyed by impact forces. All 4 occupants were killed.
Crew (9th AFU):
P/O Frederick Roger Bullock, pilot,
P/O John Alexander McIntosh, navigator,
P/O John William Butcher, navigator,
Sgt Henry John Noy, wireless operator and air gunner.

The crew where on a daytime navigation training flight from Llandwrog near Caernarvon, during the the return leg from Shrewsbury while in cloud, and shortly before 10:30 am, the pilot saw a sheep go by beneath him. He pulled the control yoke back in an instinctive effort to climb and successfully stalled the aircraft onto the rising ground but struck a large rock which spun the aircraft so it ended up facing downhill. Fortunately for the crew the fuselage remained intact, this was shown in a photograph published in 'Legend of Llandwrog', but the wing that hit the rock was destroyed, this is shown in 'No Landing Place' on page 41. After the crash the crew were able to transmit a wireless message to Llandwrog to report that they had crashed, using the Direction Finding equipment at the airfield the Flying Control Officer was able to estimate its position somewhere in the vicinity of Tal y Fan. However before a better fix could be made the remaining life in the aircraft's battery was exhausted, though the crew were advised to fire a red flare every half hour to aid the Mountain Rescue crew who departed base at 11:00. They drove their vehicles up the track from Rowen that runs around the southern side of Tal y Fan. However this track became narrow with overhanging trees and large boulders which caused some trouble for the team. Two flares were seen from towards Llyn Dulyn, but these had been fired by an 'Army Battle Unit' who were training in the area. They were also brought into the search and after only a short time reported sighting a crashed aircraft high up on Foel Fras. The Mountain Rescue Service then proceeded up the Dulyn valley and when they reached farm at Tan y Bwlch spotted a lift raft and the five crew with the aircraft. The crash site was reached at 15:00 and the crew were quickly evacuated from the site and were taken back to the Station Sick Quarters for medical assessment.
Crew (9th AFU):
Sgt Arthur Bickerdike, pilot,
P/O Oswald Ian Hamilton Stoeckel, navigator,
Sgt Laurence Tommie, wireless operator,
Sgt G. Martin, navigator 1.
Source:
http://www.peakdistrictaircrashes.co.uk/pages/wales/walesn5371.htm

While on a night training sortie from RAF Sculthorpe, the twin engine aircraft was off course and hit the slope of a mountain near Llandwrog. All four crew members were killed.
Crew (464th Squadron):
F/Sgt J. A. Johnston, pilot,
F/Sgt E. J. E. Beaudry, navigator,
F/O L. Fullerton, wireless operator and air gunner,
F/Sgt A. S. Clegg, air gunner.

During a training sortie, while cruising off Millom, the twin engine aircraft crashed into the sea in unknown circumstances, killing both crew members.

The crew of the aircraft were on a night navigation training exercise from RAF Llandwrog near to Caernarfon, while on the return leg from Shrewsbury at 2100LT the aircraft struck the southern side of Foel Grach. All of the crew survived the initial impact though three of them were seriously injured and were unable to leave the wrecked aircraft. Pilot Officer Archer, being the least injured, was the only man able to walk out for help. Rescuers arrived on site on January 16 around 1000LT. Sgt Brocklehurst was found lying across the navigator's table, apparently as though he had fallen asleep there and died, Sgt Barnett was in the co-pilot's seat and was also found to be dead. Sgt Paterson was alive and reported to be warm.
Crew (9th AFU):
P/O Kenneth Archer, pilot,
Sgt Eric Thomas Brocklehurst, wireless operator and air gunner, †
Sgt William Henry Barnett, navigator, †
Sgt Frank Paterson, navigator.
Source:
http://www.peakdistrictaircrashes.co.uk/pages/wales/waleseg110.htm

The twin engine aircraft left RAF Llandwrog located near Caernarfon at 0124LT on a night training exercise to RAF Penrhos. The crew contacted ground at 0132LT and this was the last radio contact ever. It seems the aircraft crashed into the sea while approaching RAF Penrhos as no trace of the aircraft nor the crew was ever found.
Crew (9th AFU):
Sgt Trevor Morgan Blakemore, pilot,
P/O Keith Charman, navigator,
Sgt John George Cairns,
Sgt John Mallett,
LAC Ronald Adam Simpson.

The airplane was engaged in a local training exercise at RAF Llandwrog. On approach, it collided with a second RAF Whitley registered K9041 and carrying a crew of seven. Following the collision, both airplane dove into the ground and crashed near the airfield. All 16 crew members in both airplanes were killed.
Crew:
S/L Herbert Victor Barker, pilot,
Cpl Edwin Marcus Harding,
LAC David Noel Pearman Roger, air gunner,
LAC Ronald William Seymour, air gunner,
LAC Joseph Cromwell Smith, air gunner,
LAC William Arthur Smith-Cross, air gunner,
LAC John William Stoneham, air gunner,
LAC Charles William Stubberfield, air gunner,
LAC Bert William Tucker, air gunner.

The airplane was engaged in a local training exercise at RAF Llandwrog. On approach, it collided with a second RAF Whitley registered K7252 and carrying a crew of nine. Following the collision, both airplane dove into the ground and crashed near the airfield. All 16 crew members in both airplanes were killed.
Crew:
F/Lt Evelyn John Bentick Martin, pilot,
Sgt Charles Cullen, wireless operator,
LAC Thomas Albert Pryce,
LAC John Pollock, air gunner,
Cpl Peter Edward Purdy, air gunner,
LAC Henry William Rigley, air gunner,
LAC Raymond Bryan Roffe, air gunner.