Lido swimming in the UK

A lido is a specific thing. An outdoor pool — often unheated or barely heated, usually historic, frequently beloved by its community in a way that would seem disproportionate if you'd never swum in one. The UK's lido revival is real, and it's happening because people have discovered that swimming outdoors in a pool is, somehow, completely different from swimming outdoors in a lake. It has its own rhythms, its own regulars, its own particular cold. From Brockwell and Parliament Hill in London to the restored pools of the north — the ones in this list are worth the early start.