The number of people diagnosed with malignant melanoma, the deadliest form of skin cancer, has increased to more than 10,000 a year, according to the latest Cancer Research UK figures. It is now the most common cancer in women in their 20s. But there is also broad concern over the low levels of Vitamin D in some parts of the population, with the reappearance of rickets in the UK and some areas of Europe. If our key natural source for Vitamin D is the sun, then our need for some sun exposure is important. So is there a healthy balance to be found? Jane is joined by Dr Kat Arney from Cancer Research UK and Dr Gail Goldberg from Human Nutrition Research.