There are many lidos around London, some heated, some unheated and some places where you can take part in open-water swimming. We have rounded up some of our favourites. London Fields Lido Located in Hackney , you will find a 50m Olympic-sized swimming pool which is heated for those of us who don’t like the cold. The lido is open all year round and also has a large deck for sunbathing on nicer days as well as a café. Parliament Hill Fields Lido This lido is a whopping 60 metr