Andrew Gimson’s Commons sketch: The odd couple, May and Corbyn, pretend nothing has changed

But their deputies look stricken, while the defectors are rejuvenated.

WATCH: The Prime Minister hasn’t delivered the promise she made on the steps of Downing Street, says Wollaston

“The Party that was once the most trusted on the economy is no marching us towards the cliff edge of a no deal Brexit

Sad necessity. Three Conservative MPs resign the whip to sit alongside the Independent Group

We regret the Party being less broad a tent than it did this morning. But the position of these MPs had become impossible – and intolerable.

WATCH: The Gang of Three – Allen, Soubry, Wollaston – cross the floor

They move from the Government side of the chamber to the Opposition one to sit with the Independent Group.

May responds: “I am saddened… But by delivering on our manifesto commitment we are doing the right thing for our country.”

“I am determined that under my leadership the Conservative Party will always offer the decent, moderate and patriotic politics that the people of this country deserve.”

The Group of Three’s full resignation letter: “We no longer feel we can remain in the Party…so firmly in the grip of the ERG and DUP.”

“There is a failure of politics in general, not just in the Conservative Party but in both main parties as they move to the fringes.”

May’s off to Brussels and the game’s afoot

She hopes to move quickly while Labour is splitting, get a quick gloss on the backstop, square the ERG with a hint of Malthouse later – and, hey presto, the deal will be done.

Henry Newman: A new bout of political instability hits Labour – but does it change the Brexit arithmetic?

At least four Tory MPs have apparently been placed on defection watch including Anna Soubry, Sarah Wollaston and Richard Harrington.

Ten reasons why the second referendum campaign is in disarray

The People’s Vote is bound up with New Labour and talk of a new party. This does nothing to help it among Tory MPs…and much to harm it among Labour ones.

The eight Tory MPs who rebelled to vote against the Brady amendment

The amendment passed by 317 to 301 – and seven Labour MPs rebelled to back it.

The 17 Conservative MPs who rebelled to vote for the Spelman amendment

In the night’s only defeat for the Government, it passed by 318 votes to 310 – and with the largest rebellion from Conservative MPs.

The 12 Tory MPs who supported the Reeves amendment (a two-year Article 50 extension)

Despite their support, the amendment fell by 322 to 290 votes.

The 15 Conservative MPs who backed the Grieve amendment

The proposal was defeated by 321 to 301 votes.

The 17 Tory MPs who rebelled to support the Cooper amendment

Freeman joins the rebellion. But the amendment fell by 321 to 298.

Chris White: The Cooper amendment threatens to damage the constitution in ways that would be very hard to repair

The constitutional crisis MPs are threatening to bring down on all our heads will have wide-ranging and severe consequences.