Smokers switching to vaping have helped accelerate a long term decline in the Adult smoking rate in the UK. This has been helped by endorsement of vaping's harm reduction potential from both government and non-government health bodies in the UK. All smoking rate data, and vaping data 2013 onwards, from ONS. Vaping data before 2013 from Action on Smoking and Health (ASH) estimates, and Fontem Ventures internal estimates.