Over the past five years thousands of patients in England have been given access to new but expensive cancer drugs through a special Cancer Drugs Fund. But critics argue that hundreds of millions have been spent on drugs that offered poor value for money with sometimes limited effects. The Fund is now being reformed but cancer charities have written to the Prime Minister to express deep concern that drugs will now struggle to gain approval. Phil Kemp investigates the record of the Cancer Drugs Fund and asks if the proposed changes will offer better value for money or access for patients. Reporter: Phil Kemp Producer: Anna Meisel.