Now there's a deterrent...
I was sitting in Coach A of the 11 coach Virgin pendelion to Glasgow Central (as they keep announcing everytime the thing stops) on Monday evening, when there came the ubiquitous 'bing bong' followed by...
"Virgin trains would like to remind passengers that smoking is not permitted anywhere on this train, including the toilet in Coach E. If the person smoking in the toilet in Coach E does not stop immediately, the British Transport Police will be called to read them the byelaws"
Suddenly the Quiet Coach (A in standard class) wasn't quite so quiet as we rocked with laughter!
Now we know - the threat of being read the byelaws is the best deterrent...