As an aside....I've been inside Chequers (special security clearance needed, of course) in a professional capacity in the days of Ma Thatch.
No expense spared inside, of course....including several kitchens.
She’s survived because she’s managed to prevaricate over the terms of Brexit. This was good for her survival and very bad for the everything else. At some point she will have to dare the ocular swivellers to accept a sensible Brexit plan or resign. October is the deadline and as yet no discernible plan has been forthcoming. Maybe that’ll work. More likely it won’t
So Boris is going to back Mogg then, "birds of a feather" and warning of a Tory revolt, if May does not let them have their way with Brexit. It will no doubt be what's in it for them , not Joe Public.