And it happened nearly a hundred years ago as well - involving a mate of Lloyd George called Charles Masterman, who'd been made a Minister in the Liberal Government (and had promptly done a shuffle to the right, as they do - voted against a Labour introduced Right to Work Bill that he had previously voted in favour of).

Anyway, he failed to get elected in the 1910 General Election. He was promptly put up in safe seats for by-elections, and after being defeated both times had to resign as Minister.

One factor in his defeat was said to be a song:

God rest you merry gentlemen; let nothing you dismay.
I fear that Mr Masterman will never go away.
He's lost his seat in Parliament, but draws his weekly pay,
Oh, tidings of comfort and joy.

I thought I'd stick that in, in case it comes in useful in future contingencies.