Roger Deakin's seminal Waterlog provided inspiration for me to rediscover these swimming holes across the UK. Floating: A Life Regained (Duckworth, £14.99), the book about my journey, is out in April 2017.
I've included a total of 55 swims in this collection. This does not include the private stretches of water that Roger visited, in order to protect the owners.
You can read more about my journey and why Waterlog isn't truly a guidebook over on the OSS site.