Hey there,
Flying out tomorrow IAH - LHR - MAN. IAH - LHR C on UA 4, connecting to LHR - MAN Y on BD 8102 (Originally bought as a BD flight number which, not long ago got a BA number do to the recent accusation). All on ONE PNR.
A few questions:

1. Will my baggage go all the way through to MAN? Does BD have a baggage agreement with UA?
2. Landing T-4 at LHR - will I need to leave security and take the subway to T-1 or is there another way to do that without the hassle?
3. Who do I ask for a 2 hrs voucher for shower (As I am flying BF)? I know that there's some kind of arrangement with the YOTEL just don't know what it is exactly.
4. God forbid there's a major delay and I don;t make it to the connecting flight in LHR - Who is responsible for the rebooking? UA? BD? BA?

Thanks in advance!
R