Received: 20 January 2021
Accepted: 23 August 2021
First Online: 31 August 2021
: Ethical approval was received from University of East Anglia REF: 2019/20-133.
: All authors consent to publication and approve the final manuscript.
: LR works for the Smoke Free app, is a clinical consultant for the NCSCT and is Interim Chair and mental health lead for the New Nicotine Alliance. SC, EW and CN have no competing interests to declare.