Coronary heart disease is the biggest single cause of death in the UK, causing one in five deaths in men and one in six in women; almost all of the deaths are due to a heart attack. A leading UK heart expert will speak on September 18 at a public lecture at Bristol University about the ­causes and prevention of heart attacks. Andrew Newby, professor of vascular cell biology at the university’s Bristol Heart Institute, will explore the cause for the near-death at Bristol International Airport of explorer Sir Ranulph Fiennes.