Don´t know about the UK (last time I was there cigs were already prohibitively expensive!), but in continental europe smoking still is an accepted and widespread habit (around 43% of the population, though numbers are in a slow decline). It gets worse the further you go south and east - in Scandinavia it is banned almost in all public places, in Greece or Croatia in almost none. But I´m being anecdotal.
In Austria (where I live) around 40% of the population smoke; in my dive club this number is pretty much reflected. Almost every instructor I have ever met (on trips in Europe) has been a smoker.
I myself quit 10 weeks ago. Before that I used to have a smoke right after getting out of my BC. And before getting into it. Seems soooo stupid in retrospect, even after only being clean for around 2 months....
regards, michael