[BBKing]

I presume he knew it was non-smoking on the train, hence the hanging out of the window on arrival at a station gasping for a fag. Unfortunately, it's now illegal to do that, too.

At Winnersh Triangle station there's an underpass (actually a normal brick rail-over-road arch) which is half shared with a public footpath (fence down the middle, usually busted at some point for a shortcut). Presumably the half that's part of the walking route between the platforms is smoke-free, while you can freely smoke a couple of 12 inch cigars on the other half.