Take it easy 250kts, I think it's a fair enough question considering the skies of the SE of England are pretty busy, sure nobody wants to publish timetables of B52 movements but I hardly think knowing how they integrate with commerical traffic is a national security risk.
Mind you I guess there could potentially have been suspect characters patrolling UL607 ready to pounce on the unsuspecting Yanks.....
Thanks for the common sense answer BDiONU.