A group of six soldiers have been braving the chilly depths of Shepperton Lake in Middlesex for the past five days, to raise money for their injured comrades.
Night and day, the five men and one woman have powered a total of 250 miles - among them, Trooper Clifford O'Farrell, who nearly lost his legs in a blast in Afghanistan.
Our reporter Sharon Thomas joined the team as they swam into the record books:
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The officer, known only as NC32, ducked for cover behind a car as eight rounds were fired directly at him.
The abuse began as the train approached Northwood. The woman carried harassing her victim until the next station.
London mayor Boris Johnson delegated the final decision to a deputy after publicly supporting the project.