Fuckin' 'ell, there's a mouse in my office. Clearly a suicidal murine—this is where @Menhit hangs out!

Humane trap deployed, when the mouse gets hungry Menhit will alert me to the New Toy and I will eject the visitor in the shared back garden.

(They only come in here when they're starving—this flat smells of cat. This is the first sign I've seen of mice here in about five years.)