Had the same problem in my local Morrisons. One of the self service tills IPP350 readers refuses to accept Apple but will accept contactless. All the other readers work.Just tried using Apple Pay in my local co-op, second time and the reader doesn't pick it up. It was the same till as the first time, so I'm betting it's that reader as it picked my card up when using that instead. I know it's not my phone or watch as used them fine elsewhere. The woman at the till says it seems to work temperamentally, but I have seen her on other tills. It's annoying tho.