Fake LT notices ?
http://imgur.com/8Z7dOtD
I found this on a another list (Discussion of Rivers of London aka Midnight
Riot)
someone noted
There is also a proud tradition of fake signs and posters being placed
on the Underground - I particular treasure one that exhorts passengers
to consider the welfare of other travellers and not to leave the Daily
Mail on the seats.
--
Mike D