The emergency exit sign out in the open in the Market Place

 At the junction of Market Place and Biggin Street is a pair of large emergency exit signs... outdoors.

Why would anyone need an emergency exit sign outside?

Well, my theory is that people would need a way out should anything happen during a crowded event... like the fair...

P.S. After I initially wrote this article, I found a second, temporary sign outside the Odeon on the Cattlemarket. Must be the fair, then!