Here we go: Tory MP James Duddridge writes to Theresa May tonight to ask if she will stand in the way of MPs who want to unseat the Speaker:

8th February 2017

Dear Prime Minister,

Could you confirm that if there is a vote of no confidence in The Speaker of The House of Commons, the Government will not intervene and give Ministers a free vote.

James Duddridge MP

Odds against it succeeding, but the move is on…

H/T Paul Waugh