The ex marital home. He may be living “over the brush” with his new girlfriend in number 10 (not judging, have done it a few times myself! But would be a first for a British PM I think?).
www.rightmove.co.uk/property-for-sale/property-71700562.html
Just for the record, I hate the thought of Boris as PM. I think he’s a deeply self centred, privileged turd of a man.