A fund-raiser braved scorching temperatures during one of the world's toughest races to help the charity supporting his seriously ill father.

Robert Houston, 37, was among 700 competitors who took part in the Marathon des Sables.

The race takes competitors on a 151-mile route across the Sahara Desert in Morocco with runners completing six stages over seven days.

Now in its eighteenth year, the annual event regularly attracts hundreds of runners from more than 30 countries.

Mr Houston, from Horsham, had to carry his own supplies of food and water and camping gear through rocky plains, lake beds, sand dunes and small villages in daytime temperatures reaching 40C(104F).

He took part to help the Prostate Cancer Charity and has raised about £2,300.

The charity has been helping his father Ian, 69, cope since he was diagnosed with cancer last year.

Mr Houston prepared for his challenge by training with an ex-Army officer who taught him how to march over long distances while carrying weight.

He said: "It was a fantastic week and it taught me a lot about my body and mind. We are truly gifted and live way below our potential. This experience has shown me we are capable of far more than we believe.

"The challenge was tough but I enjoyed it very much. The sight of the sand dunes and dried riverbeds were beautiful.

"I also met some inspirational people out there who were taking part.

"My father is currently battling an aggressive form of prostate cancer and he inspired me to take part in this challenge."

Lesley McGinty, the charity's community fund-raising manager, said: "I am delighted Robert's challenge was so successful. I would like to thank him for his generous donation."

The Prostate Cancer Charity focuses on support and information for men with prostate cancer and their families as well as carrying out scientific work into the disease.

The charity also provides a confidential helpline on 0845 300 8383 operated by experienced nurses.