I remember the day when you could smoke in Uniform in public amd inside a public building
. The rule i remember was that as long as you were seated and you removed your hat then it was OK, On one occassion passing through Paddington station a small group (about 10 of us) were all sat down by the OC and told to remove head dress and smoke them if we had them.
So this goes back to being the days of being hat less in public and smoking in doors, a crime i believe is now punishable by public floging
