Sources

Office for National Statistics (Opinions and Lifestyle Survey, General Lifestyle Survey and General Household Survey)

Links:

https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/drugusealcoholandsmoking/datasets/adultsmokinghabitsingreatbritain

Smoking data prior to 1974 from Wald, N. and Nicolaides-Bouman, A. (1991) UK Smoking Statistics. 2nd edition, Oxford University Press.

(1974 to 1998 data unweighted, 1998 to 2013 weighted)