Funding for this research was provided by:
Cancer Research UK (C1417/A22962)
Received: 20 April 2021
Accepted: 28 October 2021
First Online: 17 November 2021
: Ethical approval for the STS is granted by the UCL Ethics Committee (ID 0498/001). The data are not collected by UCL and are anonymised when received by the research team.
: All authors agree to the submission of this manuscript, and we can confirm that the findings have not been published nor under consideration at any other journal.
: SC has no competing interests. JB has received unrestricted research funding to study smoking cessation from companies who manufacture smoking cessation medications. LK has no competing interests to declare. LS has received a research grant and honoraria for a talk and travel expenses from manufacturers of smoking cessation medications (Pfizer and Johnson & Johnson).