Today I went to the Women's Pond in Hampstead, London, UK. After my swim, as I was getting my bike, I noticed a middle-aged, long-haired, massively beer-gutted man walk out from the pond looking very pleased with himself. My overwhelming feeling was one of not being safe. The changing rooms are shut and women change in the open. I didn't know where he had been, or what he had been seeing. He didn't look as if he had been swimming.