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The exhausted group reached the finish line at 1850 GMT having raised an incredible £1,006,509 for Sport Relief so far (total as of 1815 GMT, 4 March).

On crossing the finish line, David said: "It has been an amazing challenge, so much harder and more gruelling than any of us thought it would be. To have raised a £1m in four days is a fantastic thing - thanks so much for everyone who sponsored us, it kept us going."

During the four-day non-stop relay cycle ride, the usually pampered celebs battled brutal conditions, including blizzards, snow capped mountains and temperatures as low as -15C.

Cycling for nearly 82 hours in total, the team suffered dramatic falls, cuts, bruises and excruciating saddle sores as they strived to reach their target of £1m.

Setting off on Monday, Day One saw a tough start to the challenge as the team attempted to cycle the equivalent of Mount Everest in the first 24 hours alone, with comedian Miranda the first to sustain an injury from a tumble, cutting her leg, and later receiving acupuncture treatment for severe sickness and exhaustion.

Their trainer, former Olympian Professor Greg Whyte, described the first night's conditions: "Riding in that kind of temperature at night poses serious risks - it's potentially deadly. No one would have batted an eyelid if they'd have said, let's call this off. But they didn't and I'm amazed at how absolutely no one wants to let the team down."

Day Two saw some of the toughest terrain of the trip. Sport Relief legend David Walliams took a severe tumble as he struggled to gain speed and momentum while tackling the notorious Kirkstone Pass - a 1,000ft climb through the heart of the Lake District.

Throughout Day Three the team had to dig deep in a bid to keep going. With strained muscles and bruised limbs the celebrities went out one by one and put in some painful, but impressive performances.

Despite nearing the end, Fearne Cotton said: "We know that we need to try and keep something in reserve for the hills in Cornwall but to be honest I'm just running on empty now anyway so we will just have to see how it goes."

Over the final 24 hours, the cyclists had been struggling against the cruel weather conditions, towering mountains and extreme fatigue, but they powered through for the triumphant arrival in Land's End.

Earlier on, on the last day, David reflected on the adventure: "After I swam the Channel I said I wouldn't do another challenge. Then people associated me with Sport Relief and asked me what I would be doing this year."

He added: "It's good to keep in mind who we're helping. However much we're moaning, we have to remember that's the reality of people's lives all the time.

"When I was in Delhi, I knew I couldn't survive a night in the conditions those people were living in. Our group suffering a tiny bit puts things into context."

David's team was made up of Fearne Cotton, Miranda Hart, Russell Howard, Davina McCall, Patrick Kielty and Jimmy Carr.

What the team were up against:

• Day 1 - It's straight in at the deep end for the first intrepid cyclist from the team - or should that be the steep end? They will face a day of climbing, climbing and more climbing. They'll have scaled virtually the height of Everest - over 8,800 metres - by the end of the day!

• Day 2 - Who will be the lucky cyclist who has to contend with the highest altitude, the longest continual climb and the longest descent of the challenge? They'll go from 500 to 1,500ft up the Kirkstone pass, then downhill for another 1,500 – all in complete darkness!

• Day 3 - Everyone will be aching and rueing the day they ever met Walliams, but it's definitely not time to start taking it easy just yet. Especially as – what's that up ahead? Not another hill! Our cycling superstars will have to face not one, but two mammoth peaks – each over 1,000ft!

• Day 4 - The end is in sight… and the team will have covered an incredible amount of terrain overall! They'll have pedalled uphill roughly the same distance as climbing Mt Kilimanjaro four times over - almost 74,000ft in just four days.

The team want to raise money to help people living unimaginably tough lives in the UK and internationally.

For the full terms and conditions about the £1 text donation scheme,

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