‘Survival of the Fittest’ is just a casual 10k – made ever-so-slightly tougher by the addition of various obstacles, many of them gravity and/or mud-based. Ongoing redevelopment plans may mean the race’s Battersea Power Station-side setting is under threat, but wherever November’s event is eventually held, all 20 ‘obstacle zones’ will remain. Entrants should be prepared to get very wet. Possibly from their own tears. For full details see the website.