That’s Whitehall BS5, of course.
Whitehall SW1 and the rest of the Untied Kingdom* are saddled with the Tories until unelected pretend prime minister Rishi Sunak decides he’s had enough of ministerial limousines and borrowing other people’s private aircraft and finally decides to call a general election.
This is not the first time the artist painting the wall/custodian has taken aim at the Tories. Past targets have included disgraced former alleged party-time prime minister Alexander Boris de Pfeffel Johnson, the Conservative Party in general, fascist former Home Secretary Priti Patel and the Conservatives’ economically suicidal act of Brexit.
* = The mis-spelling is deliberate.