Meeces! Loads of them by yo sushi/pret in St Pancras STN. They clearly have a little nest in one corner and were coming out of there and running about quite happily. I think I watched around 4 at the same time. One extra tiny one kept running up the black metal leg of one of the stools.
A man from pret came past and he seemed fully aware of them "sometimes I see 10 at a time!" I guess food, crumbs, railways, humans = +++rodent activity
Cute but mildly concerning as they do prep and sell a lot of food there. Wonder what their scores on the doors are?