Annie Mole's, webmaster of Going Underground, daily web log (blog).
If you like this you'll LURVE One Stop Short of Barking, THE fun and informative BOOK about travelling on the London Underground.
Obviously it's one of the 88 stations we've been advised to avoid and I'm guessing all regular London commuters are going to be seeing these posters popping up on all of those stations.
There's no prize for getting it right (mainly because I think it's pretty easy), just the satisfaction of knowing you were right.
"The magic, mystery & sometimes maddening shortcomings of London's Tube are documented with love, enthusiasm & sometimes despair by its unofficial social historian." The Guardian