Swimming in devilishly cold water is the perfect antidote to all the slobbing, sitting and scoffing that goes on at this time of year. On Christmas morning we met early on the banks of the Dart for a bracing plunge, adorned in Santa hats and tinsel, before heading back to our various families and festive traditions. Then on Boxing Day, Anna, Yaara and I had a dimpsy dip in the pouring rain. Today, there was frost on the ground and ice in the puddles as we met again at Spitchwick. As I stood in the water preparing to immerse it felt as though a thousand tiny daggers were plunging into my legs. The water was a perishing 5.1 degrees by my watch - but 3.8 by Judy's. "Why do you do it?" I hear you ask. Well it's a bit of a cliche, but like most cliches it's true:there is something so invigorating and revitalising about the cold water....it restores you to your factory settings.