It was led by Dr Fraser Lauchlan, an honorary lecturer at Strathclyde's school of psychological sciences.

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Dr Alan Watkins is an Honorary Senior Lecturer in Neuroscience and Psychological Medicine at Imperial College and runs a training and coaching company.

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Mr Soutar, who is also an honorary senior lecturer at Glasgow University, said patients were so desperate for surgery that many were willing to forsake the next year's holiday to pay for treatment.

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Dr Nadia Micali, senior lecturer and honorary consultant psychiatrist at University College London's Institute of Child Health, says the latest figures show that 40 in 100, 000 10 to 14-year-olds are diagnosed with eating disorders, including anorexia and bulimia.

BBC: Birmingham Children's Hospital