Oh London offices do have mice problems. I work at Canary Wharf and last year sat on a trading floor infested with mice. The mice would come out in the evening

Oh London offices do have mice problems. I work at Canary Wharf and last year sat on a trading floor infested with mice. The mice would come out in the evenings. You'd know because first you'd hear one of the salespeople scream. Then the more macho traders would rush around banging on desks, trying to flush out the by now petrified mouse... The trading floors also had small cafes ('trader delis'). One day I found a dead mouse on the counter next to the cafe's credit card machine. I took a photo as I knew noone back on the trading floor would believe me. At that point, the cafe was closed for the day and thoroughly cleaned. The cleaners also started removing all food from people's desks. The best solution imo would have been cats...