Not in the UK but in Sweden. Smoking is already banned in restaurants, on train platforms, mostly all in public.
With health care being tax funded in regions, I dont want to pay for smokers bad health.
"oh but do you want to tax or prohibit unhealthy foods!!??"
Yes, first remove all drinks with sugar or heavily tax them. Not needed. Zero sugar drinks only.
2nd - price hike on snacks, chips, nuts, chocolate, "pick n mix" candy, sugar candy
3rd - BMI based health. Want any help for pain, surgery, whatever and your BMI is over 25? Lower it and you get it. Do you smoke? Stop. Do nicotine? Stop. Any hard drugs? Stop.