Image copyright Sean Conway Image caption The bearded adventurer has now travelled the length of Britain by four forms of non-mechanically powered transport

An extreme adventurer who became the first person to run, swim and cycle the length of the UK has completed the journey a fourth time - by boat.

Sean Conway, from Cheltenham, completed the "ultimate triathlon" between Land's End and John O'Groats in May.

And just before 21:00 GMT on Monday, he crossed the finish line again - in a racing yacht.

It is thought Mr Conway is the first person to complete the trek using the four different methods.

He was part of a three-man crew, with skipper Phil Sharp from Jersey and boat owner Alex Alley.

They completed the journey in just under three-and-a-half days.

The trio left Land's End in their Class 40 racing yacht at 08:55 GMT on Friday and arrived in the north of Scotland - 620 nautical miles (1,150 km) way - 83 hours and 53 minutes later.

Image copyright Sean Conway Image caption Sean Conway (left), Phil Sharp (centre) and Alex Alley (right) completed the challenge in just under three and a half days

Mr Conway said it was "amazing" to have completed the challenge.

"This was a very different experience to my previous adventures because they took weeks and months to do.

"I didn't get a lot of sleep and we were battered at sea. It was a lot harder than I thought it would be.

"I think this is it now. I think I'm done with Land's End to John O'Groats.

"No doubt I'll row it or do it on a pogo stick at some point, but for now I'm happy with my four records."

Mr Sharp said: "We are tired but feel quite ecstatic to have finished.

"It was a bit hairy towards the finish... with strong tides and big overfalls in the dark.

"Overall having done it, I think this a good course, and we have now set a benchmark which we think others will go out and challenge."