Wouldn't count in it unless BA has struck a hard bargain. Both BA and RJ have the lion's share of LHR-AMM traffic, so to take a similarly sewn-up route like LHR-HKG (op direct by OW carriers BA, QF, CX, as well as indirectly by AY), number of onward BA codeshares? Down to just HKG-AKL, HKG-SGN (am sure this is a new development) and HKG-KUL AFAIK. Even ICN seems to have bitten the dust, even though it's still shown on the ba.com routemap (after doing a little digging, it looks like BA is shifting this onward traffic to JL in anticipation of OW membership).