I live in the UK and yes smoking is an issue, not just in diving but in the population in general.
Id LOVE to see us adopt with Eire has and ban smoking in all public places including pubs and bars.
Ive seen some divers smoke 2 or 3 immediately prior to a dive (we're talking minutes here) and various other things.
Id also love to see the already high tax increased 10 fold to attempt to price smoking out of the marketplace.
On the continent the % of the population smoking is even higher, italy, greece, spain etc i guess is well over 50%.
Out of 60 members in our club id guess about 15 smoke regulary.
Where did you dive in the UK? What were the dives like ?