The mice come in through the shop next door's storeroom at the back, but they don't realise there's a problem because they have a cat which keeps the mice pretty invisible on their side.
Quite why the mice bother coming through to our premises, and what it is they find so exciting is a mystery as all our Soup Kitchen foodstuffs are in plastic tubs as is pretty much everything else, so the pickings for them are quite slim.
Despite this however, things are getting out of hand for both ourselves and for the launderette next door.