I cannot spell out too often the danger we are in. The sunlight we receive is not ordinary light, it is unfiltered ultraviolet. I have met three people with melanoma – skin cancer – on their faces and am told the incidents of skin cancer have doubled in a year. Always wear a hat in sunshine. I hope my warning of two years ago in your publication has helped people in your publication.

G F White, Coppice Hill, Bradford on Avon.