Bomb bay seats
There was a plan during confrontation (Singers) to get our groundcrew out in the Victor bomb bay but it was never used. Your friend may have heard of this
I think it unlikely this episode, if true, could have gone unreported for so long
The bomb bays of all the V's were not pressurised and so 10,0000 would be max altitude without oxygen. This would limit the aircraft range.
With regret I think your friend your errs or simply mistakes the scheme for the fact. Many are apt to collect to themselves events hear happened to others