One in every hundred men born in the 1940s will die of die of malignant pleural mesothelioma, which is almost exclusively a consequence of exposure to asbestos, with a lag time that is rarely less than 25 years and often more than 50 years from first exposure. Half of all cases are now aged over 70, with 80% in men. For a man first exposed as a teenager, who remained in a high risk occupation, such as insulation, throughout his working life, the lifetime risk of mesothelioma can be as high as one in five. There are now over 1800 deaths per year in Britain (about one in 200 of all deaths in men and one in 1500 in women), and the number is still increasing.