​Guy Martin has set off to try and beat the Guinness World Record for riding the length of the coastline of Great Britain in the shortest time.

The mechanic, Isle of Man TT legend and TV personality plans to cover the approximately 4,800 miles in 21 days.

The 35-year-old began his record attempt in his home town of Grimsby on Sunday and this morning was in Johnshaven, Aberdeenshire.

That came as something of a surprise to the owner of the hotel where Martin and his crew had breakfast – he’d watched the Channel 4 show Our Guy In China last night, so was a bit taken aback to see him in person in Scotland a few hours later.  

> Read more: Channel 4 programme documents Guy Martin’s latest cycling record attempt – crossing a desert in China

“It was a surprise because he was in China last night,” he told thecourier.co.uk.

“I knew it was him because I’d just seen him on TV the night before in the desert.

“I’m a keen cyclist myself so it was nice to see him — he was a lovely guy.”

Martin spoke about his latest record attempt in a video message uploaded to YouTube yesterday.

He said: “We’ve got a big job on. Record’s stood since 1984, I’m going to try and break it.

“I’m setting off to try to break the record of pedalling around the circumference of England, Scotland and Wales. That’s what I’m doing.

“The record, as it stands, is 22 days, I’m going to try and do it in less than that. The record’s stood since 1984. No-one’s broken it, no-one’s come near it, so, it all starts here.

“It’s further than you’d think. It’s 4,802 miles, that’s what the official record distance is, 4,802.”

Coincidentally, while Martin is someone who achieved fame on a motorbike before embracing pedal power, the current record holder, Nick Sanders, is someone who has made the opposite journey.

Twice a Guinness World Record holder for the quickest circumnavigation of the globe by bicycle, he has ridden around the world seven times on a motorbike, the quickest being in an astonishing 19 days 4 hours.

To beat the record, Martin  needs to complete the ride by 5am on Christmas morning.