Our sub-editor Alice Gartland accomplished the ultimate pool swimming challenge last year - swimming the Marathon 10km swim in the London Aquatics Centre on Queen Elizabeth Olympic Park.
If you are taking part in the event this year we have attached an article that Alice has written that will help you to prepare for this fantastic event that takes place next weekend.
Good luck to everyone who has signed up.
If you enjoy reading Alice's article why not subscribe to Outdoor Swimmer and get the November, December and January copies for just £5* and stay on top of all the latest outdoor swimming
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Swim wild and free
The Outdoor Swimmer team