Swim Serpentine, the 2 mile swim in London's Serpentine lake is on a lot of runner's bucket lists for one reason... the London Classics. The London Classics comprise of the London Marathon, Ride 100 (a 100 mile bike ride looping out of London) and the Swim Serpentine. And like many others, I just have the swim to complete to earn that elusive 'Classics' medal. I've actually been signed up to swim the last two years but one year was cancelled due to the Queen's funeral, and last year algae levels were near dangerous levels and so refunds were offered (it was two weeks before Bertie was born and I was probably undertrained so I opted out). For me, a two mile swim is FAR. Like kinda scary far. My plan is to swim it next year with my friend Tam and give myself a decent amount of time to train for it! For those training for Swim Serpentine this summer, or other long distance swims including Ironman, the Henley Swim events or Swim/Run hopefully this is a helpful guide for your training......