Are BA happy to give their pax to those 3 airlines you mentioned? I know they are in ONE WORLD, but surely some revenue must be lost giving a US pax to Etihad,Sri Lankan or Malaysian in LHR when they originated with you in USA? As another thread has said, “where do you start?” BA was once the KING of airlines, and one was proud to fly in the F or J cabin. It was the same as SQ now. Only F or J revenue flew in the cabin, and upgrades in the 60s were unheard of. SQ do not offer reduced F or J fares, although it appears now they are suffering, so “specials” are being offered. Even the CONCORDE was special, and it was great to fly it, even if only for a few years!