A surgeon cannot be that exact and will harm some of the living tissue. During the course of a three-day treatment, the maggots' bodies, full of dead tissue, expand from an average length of two milimetres to three times the size. They leave wounds pink and healthy. Mr Vowden says many doctors are still reluctant to use maggot therapy. He believes this is because they are not advertised like drugs are and because patients are put off by them.
Patients expect tablets.
The maggot item is on 12 March. The BBC is not responsible for the content of external internet sites.