Last week I participated in my first UK open water swim in the mighty Thames. I have always enjoyed open water swimming but up until last week the Pacific Ocean had been my venue of choice. It was therefore with great apprehension that I dove into the Thames. Sure a shark attack is unlikley, but the water is murky and you can't be certain of what is lurking (living or dead) beneath. At 3.8km, the swim was also the longest open water swim I have done. In true British style it was cold and raining, but nonetheless, we doned our wetsuits and took the plunge. And I was glad that I did. There is an unrivalled sense of freedom that comes with swimming in open water and I had forgotten how much I loved it.