Good info all, thank you. I booked this ticket a month ago using HP flight fund miles (100K each). This flight is for Nov 19th, and my routing is PHX-DFW-LGW and on the return leg on Nov 27 it is LHR-DTW-PHX (no sleeper seats on that flight!). Both US legs will be F on HP.

I assume I will not be able to utilize online checking as I have baggage to check at Phoenix at the HP counter. I also assume they will properly interline my baggage all the way to Gatwick.

The one poster mentioned manage my booking. How would I access this? I'm not sure I would even be able to using the PNR I have, as it may be HP generated and not BA.

Worst comes to worse I could call BA -23hr59min and ask about seat availability then.

One poster mentioned good luck trying to ask someone to switch an aisle in the two block to a four block and I agree--but what about the pax sitting in the seat next to the aisle in the four block? I would at least think they would be more incenticized to switch to 1. an aisle 2. a two block.

Oh by the way, does this flight arrive into N or S terminal at LGW?

Thanks!