Avro Anson Mk.I MG804 of No.8 (Observer) Advanced Flying Unit crashed on Foel fras in the Carneddau on the 12th July 1944 while on a navigation training flight from Mona on Anglesey


Alan Biffen Flight Sergeant Pilot Survived
Albert Francis Standring Flight Sergeant Wireless Operator (Instructor) Killed
Victor Joseph Sibthorpe Pilot Officer Navigator Survived
Dalton Sergeant Air Bomber Survived
Lorrimer Sergeant Wireless Operator (Trainee) Survived


The crew of the aircraft were on a night navigation training exercise from RAF Mona on Anglesey (now a satellite to RAF Valley). At approximately 02:00 the aircraft struck Foel fras just below the top of the ridge killing Flight Sergeant Standring and injured the others to varying degrees. Luckily though the wreck did not catch fire, though the wreckage was later disposed of by burning it.

Before long a message was passed to Flying Control at Mona, as the radio equipment was still working after the crashed, they used their D/F equipment to obtain a bearing towards the crash site, this indicated the aircraft was in the Carneddau mountains. This information was passed the Mountain Rescue Unit at RAF Llandwrog

The crash site was located at about 08:30 by the Mountain Rescue Unit, their injuries were treated and then the survivors were led off the mountain. F/Sgt Biffen and Sgt Dalton were taken to Llandudno hospital while P/O Sibthorpe and Sgt Lorrimer were returned to the the Station Sick Quarters at Mona.

The crash site of Avro Anson MG804 on Foel Fras, the Carneddau
Above is the crash site of MG804 at 3000′ on Foel Fras, there are three separate burnt patches possibly one for each wing and another for the fuselage.
Undercarriage wreckage at the crash site of Avro Anson MG804, Foel Fras, the Carneddau
The aircraft’s undercarriage can still be found at the site.
Alan at the crash site of Avro Anson MG804 on Foel Fras
Alan holding up a piece from on the aircraft’s wings, as you will be able to see it is about 11′ tall.