Originally Posted by
bjorns
Assuming you're on BA in First, then you'll have access to the CCR.
If you're on AA, then the AA arrivals lounge followed by Galleries Club, or if you're OneWorld Emerald, Galleries First.
1. AA doesn't fly WAS-LON non-stop (admittedly it could be WAS-JFK-LHR-AMS etc.);
2. Even if the OP is on AA, [s]he is in First and would be connecting from a long-haul to a short-haul, with the higher class of service (in this case, the long-haul) determining the lounge access if both flights are on the same day under OW rules. As such, the correct lounge would be Galleries First, regardless of Emerald status.