I have 61B LHR CPT, business. I think that's a 747 and the seat map I looked at shows that seat upstairs. I understand my 18" roll-a-board might not fit overhead. Where should I put it when I board? (I might want things from it during the flight). And is that seat a flat bed?

And am I correct that usiness entitles me to transfer lounge facilities at LHR? Anything interesting to expect? (I'm connecting to/from United, SFO LHR coach).

Sylvia