Couldn't exactly find my query but I'm thinking doing to opposite of OP now that AA is slashing earning rates and I'll be in the UK for at least the next 2.5 years/do most of my flying on BA. Two questions - are there any specific benefits to having BAEC silver vs OW sapphire on BA metal? While transitioning programmes, is it possible to use AA for extra bags/lounge access/fastrack immigration whilst crediting to BAEC (and how)? I'd need to start with tomorrow's so any quick responses would be greatly appreciate.