Forty three per cent of England's smokers tried to quit in 2007, and many of them several times - according to Cancer Research UK's director of tobacco studies, Professor Robert West. His findings are presented at the Action on Smoking and Health (ASH) Wales* conference in Cardiff today (Monday). More than 27,000 smokers and ex-smokers were asked about their attempts to stop smoking in a series of monthly surveys** between November 2006 and January 2008.