Apple Pay launches in the U.K. [Getty Images]

A customer uses an Apple Inc. Apple Watch to pay via the Apple Pay system, from their Nationwide account, at the check-out till inside a Pret A Manger Ltd store this arranged photograph in London, U.K., on Tuesday, July 14, 2015. Apple Inc. is making the U.K. the first market outside the U.S. for its digital-wallet system as the company fights for a place in the electronic-payments industry. Photographer: Chris Ratcliffe/Bloomberg via Getty Images

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