I don't understand your comment about the smoking ban - I've seen it
flouted less than 10 times since it was introduced and on several
occasions I asked, having identified myself as staff, the offender to
put the cigarette out and they complied immediately.

Travelling on the Met reguarly I find its openly abused by sly faggers
(trying to hide their habits from all the other passengers) both on trains
and platforms. OK so it may be in the out in the open air but the ban still
applies does it not? In central London it certainly is more effective.