From the BBC:
Windsurfer’s accidental crossing
A windsurfer who sailed across the Bristol Channel claims he did not intend to make the three-hour crossing.
Adam Cowles, 24, set out from Swansea Bay and realised he had gone further than planned only when he rounded a cargo ship.
Mr Cowles said he decided to press on in the direction of England after realising his starting point had all but disappeared from view.
…
“I then went past a cargo ship. I turned around and realised that I had gone too far.
…
Mr Cowles said that one of the most frightening parts of the day was having to call his wife and ask her for a lift home.
It might be time for Mr Cowles to buy one of these.
Or stick to a safer sort of surfing .

