The United Kingdom’s approach to cessation which endorses harm reduction through the use of safer alternatives to combustible cigarettes stands in contrast to the Thailand policy of banning e-cigarettes and messaging against their use. It is likely this differentiating factor that moved the smoking rates down in the United Kingdom.
Image credit: WR.lili 
- “Thailand Should Follow the United Kingdom’s Lead: Examining Tobacco Policy Abroad”: https://www.rstreet.org/2020/10/05/thailand-should-follow-the-united-kingdoms-lead-examining-tobacco-policy-abroad/
- “WR.lili”: https://www.shutterstock.com/g/WRSISI