BA then to Lufthansa. He has flown Boeing 747-400F, Airbus 380, Boeing 757-200, Boeing 777-300ER at that time and.he said it was given or take 10 to 12 years.
I'm a great believer in "never say never" so I'll simply say that's an impressive CV given the supposed timescale and the way many airlines now don't like pilots frequently changing types (though some moves can be forced moves provoked by a fleet being phased out).
It's not clear (to me) where he flew what type but FWIW BA Mainline have never operated the 747-400F (though I have just belated remembered that
GSS operated them in BA colours) and BA's 777 fleet pilots fly both -200s and -300s..
if somebody was going around claiming to have been specifically a 777-300 pilot
at BA I really would be having my doubts.. .
Best of luck with resolving this.