Heidi Allen, Anna Soubry and Sarah Wollaston said in a joint letter to May that her government was handling Britain's exit from the European Union "disastrously" and that the Conservative Party was "firmly in the grip" of hard-line pro-Brexit lawmakers.
"We have had a whitewash report, we have had unprecedented actions of Jewish people feeling they have to demonstrate against the Labour Party in Parliament Square".
But, they said, the party had changed beyond all recognition under Jeremy Corbyn and they could no longer be part of it. I wasn't elected as a Labour MP to watch this happen, and I have no choice but to stand up to it. "I grew up in a working-class family, in a council house in Chigwell, in Essex", he told the audience.
"We will fight those anti-Semites, we will deal with those bullies, we will bring half a million Labour Party members together and we will go out on the doorsteps and try to make this party electable".
Others were less sentimental about Labour.
But the resignations threaten a decades-old two-party system and mark the biggest shake-up in years for Britain's political parties.
There were mixed emotions at the Conservative event too, with Anna Soubry clearly finding it hard.
I hope no one will vote for her again.
"I feel excited, so excited".
"I'm very disappointed that a few colleagues have taken this decision", Mr Zeichner said of the enterprise, "although not entirely surprised, as they have clearly been unhappy for some time".
Cllr Smith said: "We welcome Heidi's decision to leave a party with which she has seemed increasingly uncomfortable".
Honda Has Confirmed It Will Close Its Swindon Factory in 2021
Honda just announced this week that it will be closing its Civic hatchback factory in Swindon in the United Kingdom . Honda said it had informed employees about what it called its "proposal " to close the Swindon plant.
He then declared: "Now is the time we dump this country's old-fashioned politics" to create an alternative. But the only news-y thing about the latest PMQs session was the remarkable sight of Heidi Allen, Anna Soubry and Sarah Wollaston taking their places on the opposition benches. But we now feel honour bound to put our constituents' and country's interests first.
In the meantime, South Cambridgeshire Conservatives need to unite and focus on ensuring that the next MP for South Cambridgeshire is a Conservative MP.
She said: "We have seen in the past that setbacks like this can cause damage, we now need to come together because a Labour government is the best thing for Aberdeen and the United Kingdom".
The open primary system, meanwhile, appears to have been dropped.
The outspoken Soubry is a former government minister who sat in David Cameron's cabinet, while Wollaston is chair of the Commons health and social care committee. "They are the Conservative Party".
Jeffery said: "These are MPs who were already willing to vote against the government on key Brexit votes, so in terms of the arithmetic it's not significant".
The split has polarised the Labour Party even more.
"They must", said Mr Turner.
"There has been a dismal failure to stand up to the hard line ERG which operates openly as a party within a party, with its own leader, whip and policy". In August 2015, during the Labour leadership election, London-based newspaper The Jewish Chronicle issued "seven questions regarding Corbyn's record on antisemitism" on its front page, which, unless being answered immediately and in full, would result in Corbyn being "regarded from the day of his election as an enemy of Britain's Jewish community".
"The critical thing is that the British Attorney General, Geoffrey Cox, needs to be able to change his advice to parliament that now says that it's possible, if not likely, that Britain could be under the current backstop arrangements, trapped in the customs union forever against its will", Hunt said.
Speaking to BBC Radio 4 Today Programme Ryan said, "We never had this problem in the party before he was the leader".