Dermot O’Leary, Craig David and Lorraine Kelly are among a team of celebrities planning to trek across a desert in aid of Comic Relief.

The trio – alongside impressionist Ronni Ancona, singer Olly Murs, Strictly Come Dancing champion Kara Tointon, actress and TV presenter Nadia Sawalha and radio presenters Scott Mills and Peter White – will travel across one of the world’s most inhospitable deserts – the Kaisut Desert in north Kenya.

The team will start their journey over the tough terrain in mid-February.

They will cover 100 kilometres across the barren desert in five days and face temperatures of up to 38C.

After walking all day under the scorching sun they will camp in the desert and may encounter some deadly snakes – including the Black Mamba and the Puff Adder.

They will be leading a caravan of camels which will be carrying their camping gear and other equipment they need for the journey.

Due to heat and the gruelling task, experts have estimated that each member of the team will burn around 8,000 calories each day.

The BT Red Nose Desert Trek will raise money for Comic Relief projects which benefit deprived people across Africa and in the UK.

A Comic Relief spokeswoman said the team will be highlighting the issue of sight and the money they raise will prevent thousands of people in Africa from going blind or contracting eye conditions.

During their journey they will encounter people who are losing their sight and need urgent eye care.