Someone has been creating substitute ads on the Tube; the 'Poems on the Underground' series having evidently proven ideal material.
( The Tyger - apols to William Blake )
ali_anarres says there's also a sonnet. Photos welcomed.
(I know the Situationist line is that there is no such thing as 'Situationism'. I do not care.)
Update: From a tubeworker: "The train maintainers know about the fake poems - and think they're funny, so they're leaving them up! Management don't know yet."