A photographer donned his goggles and swimming cap on Wednesday to swim for 12 hours as part of an effort to raise £2,000 for SportsAble.
Ian Legge, of Farm Road, Maidenhead completed a 10km swim along the Jubilee River in June and a 14km down the Thames earlier this month as part of his fundraising challenge for the disability sports charity, based in Braywick Road.
He plunged into the Magnet Leisure Centre pool at 9am to begin his final and most gruelling test.
The 48-year-old swam for two hours at a time, stopping for 10 minute breaks to refuel.
He was set to keep going until 10pm and expected to swim the equivalent of the English Channel.
He said before starting: "I've got energy drinks lined up but I've got to go to the loo as well because I can't go in the pool!"
SportsAble spokeswoman Melissa Paulden said: "Ian joined early on last year as a volunteer photographer but has been a massive supporter and fundraiser ever since."
Visit justgiving.com/swimming-for-sportsable to donate.
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