What cabin are you paying? Business/Economy/First? If economy, what booking codes?
How often do you fly? Twice per year? Twice per month?
Any flights intra-Europe?
There is no *A flight on LON-NYC, are you prepared to make a stop?
LON-SFO non-stop is only possible on UA - happy with that?
*A status does not necessarily give you access to fast track lanes at LHR. Still interested?
SmilingBoy.