Beeayeate
The only thing I can help you with are dates and crew details of the four Farnborough Mosquito accidents during 1944
25 January 1944.
Flt Lt Granger and Plt off Gostling Aerodynamics research flight.
12 April 1944.
Sqn Ldr Moffet and Mrs Pierce Engine research flight.
22 June 1944.
Lt Cdr Brown Aerodynamics research flight
23 August 1944
Sqn Ldr Nelson and Mr Shirley Aerodynamics research flight.
So the answer would appear to be that your man was not involved.
JF