James
I think maybe you are correct-perhaps I should just maximise my miles with one carrier. However, I have flown with other carriers and have therefore "lost" lose miles, if you know what I mean.
quitecontrary
I had thought about getting my husband to get an Amex and me to get the companion card. We also have amex blue ( to save the fees) and now of course I have an Amex TCC! It could be a bit confusing!
It looks like a choice between yet another amex or just using the Tesco mastercard!