When the heat is on, the clothes come off — but how far will you go? Here are some London places where nudity is mandatory and you can let it all hang out among like-minded bare-body enthusiasts
University of London Union, every Sunday
Not too sure which bikini you prefer? Or maybe those trunks don’t look as good on you as they did on Channing Tatum. Why bother? Naturist London's Sunday Swim is a regular event with no booking or membership required, just strip off and dive in. Here naturists, or those who just fancy a skinny dipping session without having to trek to a nudist beach, can get naked and get swimming. The perfect pre-Sunday roast dip. Those who want a more leisurely bask in the sun can head to the only official naked sunbathing area in London, the banks of the men’s swimming pond on Hampstead Heath. Unfortunately it’s men-only but women can sunbathe topless at the ladies’ pond. A python was recently found in the water so naked swimming is not recommended.
More information is located here
http://www.standard.co.uk/goingout/attractions/where-to-get-naked-in-london-8711419.html
If the alleged python was small, perhaps it was just a well endowed man. It is possible.