So today I had my inaugural lunchtime swim, and I am pleased to report that while the open-air pool in Covent Garden doesn’t quite live up to Lake Huron, it’s a lot nicer than Brockwell Lido. Architecturally it’s pretty horrible, unlike the Lido, which is gorgeous, but the warm water changes everything and transforms it from a hostile environment into a welcoming one. I only managed four lengths – and, well, I had to have a rest in the middle – but it didn’t leave me cold and miserable like my Lido swim did, but rather happily invigorated, albeit with trembly knees that may not be working at all by the morning. There’s something about swimming in warm water on a cold day that is just perfect and not like anything else. I will be back.