You're certainly not going to be blessed with brilliant weather in the UK in Winter, but don't rule Cornwall out. It's home to some incredible subtropical gardens for a start. Plus there's The Eden Project, which is definitely somewhere you can stay cosy while you learn. If you head to Bedruthan, one of the most beautiful bays in the country, you'll be rewarded with a private hot tub at The Scarlet Hotel. This is our idea of wild swimming.