Red Nose Trek team head towards finish line

The BT Red Nose Desert Trek team are heading towards the finish line of their gruelling challenge.

With the all-star group - including Dermot O'Leary, Lorraine Kelly and Olly Murs - hoping to complete the excruciating 100-kilometre walk across Kenya's inhospitable Kaisut Desert at some point today (25.02.11), the celebrities are still suffering at the hands of the scorching heat.

Walking alone in the hope of focusing on their individual efforts, emotions were running high among the trekkers when they reached base camp last night.

'X Factor' host Dermot explained: "There's no two ways about it, this has been an awful lot harder than I imagined it would be. The sheer physical effort required to walk 100 kilometres in this heat is extraordinary."

Meanwhile, emotional 'Dancing On Ice' star Nadia Sawalha admitted the lack of food has been getting to her to the extent that she can't guarantee she will be able to complete the challenge.

She added: "I was so desperate for the food stop to come that every time I looked up and saw camels, my brain told me that's where we are stopping.

"But they just kept moving. It was so demoralising - every step is painful at this point and a few of us have started to wonder whether we are going to make it."

Elsewhere, a "determined" Lorraine Kelly explained knowing the team are raising money to help disadvantaged people in the UK and Africa is keeping them going.

She said: "When I looked at my feet this morning I thought that my big toe had doubled in size - but it was just a huge blister on the top of it.

"Every step I take feels like I'm slamming my foot down on the ground. But we're all determined to give it every last ounce of energy and knowing that there's so much money being raised is helping to keep us going."

All the ups and downs of the group's journey will be captured for a documentary which will be in the run up to Red Nose Day.