Tony Phoenix-Morrison, the fundraiser who carries a 42kg fridge, has been forced to abandon his latest challenge - which he had said would be his last - because of sickness.
Tony, known as 'The Fridge', was trying to run four marathons within 24 hours, starting with the London Marathon.
However, he has suffered sunstroke and sickness overnight, including fainting. He called the race off after his second marathon.
Tony the Fridge has 'just a few miles to go' and is hoping to complete his challenge of four marathons in 24 hours within the hour.
As Tony the Fridge attempts to complete the challenge of four marathons in 24 hours, his supporters are tweeting him messages of good luck.
Tony 'The Fridge' Morrison says he has been overwhelmed by the support from people across the country.
The fundraiser, who is on his last charity run with a fridge on his back, says the London Marathon was harder than he thought. He spoke to Kenny Toal after crossing the finish line.
Tony 'the Fridge' Morrison has finished the first part of his gruelling challenge. He completed the London Marathon at around 4.30pm.
The fundraiser, from South Tyneside, will have a short break before starting again on his second of four marathons.
Tony 'The Fridge' Morrison has spent the past few years raising thousands of pounds for cancer charities running the length and breadth of the country with a 42kg fridge on his back.
His efforts have taken their toll on his body and today he's embarking on his final challenge.
Tony, from South Tyneside, is running four marathons in one day. His first was with thousands of others as he took part in the London Marathon.
But while the other runners will be nursing sore limbs and blisters, Tony will continue to run.
Over the last four years he has ran 30 half-marathons in 30 consecutive days and trekked from John O’Groats to Land’s End for the Sir Bobby Robson Foundation.
This final challenge will raise thousands for Cancer Research.
Follow Tony's progress every step of the way here
The bombings at the Boston marathon has made some runners re-think about taking part in the London marathon this Sunday.
At least one north east entrant has decided to run in the Marathon of the North instead, as Derek Proud reports.
You can watch his full report below.
Alyson Dixon has thanked people for their support in today's London Marathon. The Sunderland runner has just missed out on an Olympic team spot after failing to finish in under 2 hours 30 minutes.