[Symbiote]

It took the UK a few years since contactless cards were launched around 2010. Everyone already had chip+pin terminals, and at first it was mostly coffee shops in London, but now many merchants have upgraded to contactless ones. It's not just national chains, but local shops too. It's much faster paying by contactless in a busy pub than paying cash.

It's possible there's pressure/support from Visa and MasterCard for small, local retailers to accept contactless payments. It's part of their advertising that you can buy a newspaper using the system, and most newsagents are local, independent shops.

A basic chip+pin (not contactless) terminal is available for £100 (or £3/month), I can't find a price for a contactless one.