The provided content discusses the prevalence of smoking at a postcode sector level using commercial socio-demographic databases. Three studies were reviewed, including Mardle et al.'s (2012) evaluation of NHS Stop Smoking Services, Beard et al.'s (2016) study on the impact of electronic cigarettes on quitting rates, and Matcham's (2014) pilot randomized controlled trial on maintaining attendance at NHS Stop Smoking Services. The research highlights the importance of these services in promoting smoking cessation. By leveraging commercial socio-demographic databases, this study aims to estimate smoking prevalence at a postcode sector level.