Apple Pay is on its way to the UK next month, and from launch, all the big banks except Barclays, and a quarter of a million retail outlets will support it. And yet, despite so many day-one partners, it seems we're not quite ready for it. You see, Apple Pay isn't like any other contactless payment method we use already, since you authorise transactions with a Touch ID fingerprint scan. Contactless debit and credit cards don't require any kind of authentication, which is why transactions are currently limited to a maximum of £20, though the cap is increasing to £30 in September. The whole point of the two-step Apple Pay process is that you can make purchases of any amount using your iPhone, but today we're hearing that the majority of retailers will be bound by the £20 cap at launch.