Roger Deakin (born 1943) was an English writer, documentary-maker and environmentalist. He co-founded Common Ground, the arts, culture and environment organisation, and served as its trustee – but his lasting fame rests on a single book. Waterlog, the only book he published in his lifetime, topped the UK bestseller charts and founded nothing less than the wild swimming movement.
Few writers can claim to have changed national behaviour with one volume; Deakin did. He died in 2006, and his stature has only grown since – Patrick Barkham published a biography, The Swimmer, in 2023 – leaving him established as one of the quiet patron saints of British nature writing.