Fancy a dip? Time Out’s list of London’s best and most historic lidos should come in handy. These include Brockwell Lido in Dulwich (known as Brixton Beach, with a 50m pool), Hampstead Heath Swimming Ponds and the neighbouring Parliament Hill Lido (a chilly 1930s monument), and Tooting Bec Lido (above and below). All are open to the public.
For info, see Lidos listing.