Democritus
Can't id the registration you flew on but its one of the following I would think.
G-AOVT, at Duxford, was operated by British Eagle from 13.09.63 to 10.05.74.
G-AOVF at Cosford now purporting to be a RAF Brit was also with Eagle as a freighter
G-ANCF at Speke, was with Eagle from 16.01.64 but converted to freighter between that date and going to Monarch 08.12.68
The Brit at Kemble XM497? is ex RAF so not likely.
Other Brits in use with Eagle in August 65 were G-AOVA, VH, VC,VG, VL,VM,VN,VR,VS -possibly, G-APPY, G-ARKB
Hope that help.