Professor M. John Kennedy:

Absolutely. Cancer is a disease of the modern lifestyle, and there are a host of things in that regard, ranging from ultraviolet light, which we get when on our holidays in the south of Spain, to the food we eat. There has been a significant increase in the proportion of people in the western world with colon cancer who are under the age of 50. We do not understand why that is, but it is true in America, Europe and Ireland. That is almost certainly due to lifestyle changes that took place probably 30 years ago in terms of processed foods, etc.