Pretty much all of this information comes through Howard Newbould.
On 3rd April 1929 No.4 Squadron moved their twelve Bristol F.2b fighters, consisting of three flights, from Farnborough to Sutton Bridge to undertake air firing training exercises. On 18th April 1929 A and B-Flights returned to Farnborough. On the same day three aircraft of C-Flight were intending to fly to Catterick rather than head south. Unfortunately thick fog on the flight north saw the three aircraft become seperated. One of these is listed in the unit records as force landing on a high mountain near Middlesmoor, Yorkshire.
For decades an unidentified aeroplane has been rumoured to have made a forced landing on the eastern side of Great Whernside with references made to workmen building the reservoirs of Scar House and Agram assisting the crew. It is highly likely that the incident on 18th April 1929 and this are one and the same incident.
The The 4 Squadron records do not give the service number but checking through all Bristol F.2b's they had, J8271 is the only one that could fit the bill for the identity. It was taken off squadron charge in April 1929, with it returning to a new flying unit in December 1929. This suggests it was under repair during the missing months.
Pilot - F/O Charles Ivar Arthur Jackson RAF.
Passenger - Name unknown.