Pair complete 1,250-mile walk for whales and dolphins

They set off from Land’s End on 10 May, trekking along the Pennine Way, before crossing over the Scottish islands of Bute, Mull and Harris.

Mr Greene, 19, from Edwinstowe, said he was not aware of anyone else having hiked to John O’Groats via the same route through the Hebrides.

The pair battled torrential downpours, strong winds and – on the Scottish peninsula of Ardnamurchan – hundreds of ticks in their sleeping bags.

“Our legs were crawling with ticks,” Mr Greene said.

“We estimated between 400 and 500 ticks just on our tent and in our sleeping bag. It took us days to get rid of them.”

He added: “There were some people accusing us of calling this a holiday, but if this was a holiday, I’d want my money back.”