For those interested in the film 633 squadron my research shows the following aircraft were used in the making of the film and what is known to day of their whereabouts and they did indeed destroy some on purpose for the film.
'633 Squadron ' used no less than eight Mosquitoes plus a fuselage ; all were either TT.35s or T.III trainers and in the main had been bought from the then-disbanding No 3 CAACU at Exeter.
The aircraft and their last known whereabouts were as follows ; -
RS 709 - now at USAAF Museum, Ohio
RS 712 - now with Kermit Weeks, Oshkosh ( ?? sold to Canadian owner 2003 ?? )
RS 718 - deliberately burnt and destroyed during filming
TA 639 - now at RAF Museum, Cosford
TA 642 - destroyed in accident
TA 719 - now at IWM, Duxford
TA 724 - deliberately wrecked during filming
TW 117 - now at Norwegian AF Museum, Bodo
And last but not least, all the cockpit scenes were shot using the fuselage of TJ118, which is now at the MAM, London Colney where it's used for parts donations for other rebuilds.
Plenty of information about all these aircraft can be found in 'Mosquito Survivors' by Stuart Howe ( Aston, 1986 ) and Gary R Brown's article in 'Warbirds Worldwide' no. 29, April 1994.