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.
Thanks to both @parksidemalvern & @magslhalliday for telling me about this. ITV also sent along someone to the station to film the sign, although appear not to have spoken to anyone about it while there.
Not sure what you're supposed to do if you're wearing a skirt or shorts! Keep a look out for the little creatures and make a run for it.
Update: Good news (or bad news - if you like the thought of dangerous mice) I've just received the following from TfL "Please note. The
writing on this whiteboard was not an official TfL message and has since been
removed. We are not
aware of any problems with mice so do not believe this was written by station staff."
"The magic, mystery & sometimes maddening shortcomings of London's Tube are documented with love, enthusiasm & sometimes despair by its unofficial social historian." The Guardian