Three Conservative MPs have announced they are resigning from their party to join ex-Labour members in the new Independent Group in the House of Commons.

Heidi Allen, Sarah Wollaston and Anna Soubry left Theresa May’s Tories after being heavily critical of her approach to Brexit and the growing influence of eurosceptics in the party.

It means the Independent Group now has eleven members, as many as the Liberal Democrats, including the eight MPs who have walked out of Jeremy Corbyn’s party in recent days.

In a joint statement, the three MPs leavng the Tories said they had wanted their party to broaden its appeal to young people and reflect the diversity of British communities.

They indicated that their frustration with Ms May had instead been exacerbated by her reliance on the support of the Brexiteer dominated European Research Group, headed by Jacob Rees-Mogg and Steve Baker, and her Northern Irish DUP partners in government,

The three MPs said: “Sadly the Conservative Party has increasingly abandoned these principles with a shift to the right of British politics.

“We no longer feel we can remain in the party of a government whose policies and priorities are so firmly in the grip of the ERG and the DUP.”

The said that the “final straw” was what they claimed had been the government’s “disastrous” handling of Brexit with “red lines” that alienated almost half of the population.

Which MPs defected to form Change UK? Show all 12 1 /12 Which MPs defected to form Change UK? Which MPs defected to form Change UK? Change UK Details on the individual MPs are in the following photos Reuters Which MPs defected to form Change UK? Heidi Allen Anti-Brexit MP for South Cambridgeshire resigned from the Conservative party on February 20 PA Which MPs defected to form Change UK? Chuka Umunna MP for Streatham since 2010 and prominent People's Vote supporter PA Which MPs defected to form Change UK? Anna Soubry The prominent anti-Brexit MP for Broxtowe resigned from the Conservative party on February 20 PA Which MPs defected to form Change UK? Luciana Berger MP for Liverpool Wavertree since 2010, resigned from the Labour Party over bullying and anti-semitism PA Which MPs defected to form Change UK? Sarah Wollaston Anti-Brexit MP for Totnes resigned from the Conservative party on February 20 PA Which MPs defected to form Change UK? Joan Ryan MP for Enfield North resigned from the Labour party on February 19 citing its tolerance of a "culture of anti-Jewish racism" PA Which MPs defected to form Change UK? Ann Coffey MP for Stockport since 1992 Chris McAndrew / UK Parliament Which MPs defected to form Change UK? Gavin Shuker MP for Luton South since 2010 Getty Which MPs defected to form Change UK? Chris Leslie MP for Nottingham East since 2010 PA Which MPs defected to form Change UK? Mike Gapes MP for Ilford South since 1992 PA Which MPs defected to form Change UK? Angela Smith MP for Penistone and Stocksbridge since 2010

Announcing that they would sit with the new group, they went on: “The country deserves better. We believe 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, leaving millions of people with no representation. Our politics needs urgent and radical reform and we are determined to play our part.”

The three confirmed their intention to sit as independents in “the centre ground of British politics”, explaining that there would be times when they would support the government on measures to strengthen the economy, on security and improving public services.

Shortly before prime minister’s questions, the three MPs crossed the floor of the commons to sit with the Independent Group, which soon tweeted to welcome them, adding: “Both our parties are broken.”

In one daunting sign for Ms May, the three received support from one of her closest allies, home secretary Amber Rudd, who said on Twitter that it was a “great shame” they were leaving.

She added: “I look forward to continuing to work with them on a number of important issues, including a Brexit deal that works for the whole country.”

Downing Street appeared ready for the announcment, with the prime minister releasing an immediate statement saying that she was “saddened by this decision”, adding that they are people who have given “dedicated service”.

Jeremy Corbyn 'regrets' that MPs have left the Labour party to form independent group

She went on: “Of course, the UK’s membership of the EU has been a source of disagreement both in our party and our country for a long time. Ending that membership after four decades was never going to be easy.

“But by delivering on our manifesto commitment and implementing the decision of the British people we are doing the right thing for our country. And in doing so, we can move forward together towards a brighter future.”

“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.”

Deputy Chairman of the Conservative Party James Cleverly said it was particularly disappointing that they left over Brexit because it was a policy issue that would be “resolved soon”.

Liberal Democrat leader Sir Vince Cable said his party would “hold out the hand of friendship” to the independents, saying: “There is clearly some very radical changes now afoot as both the Conservatives and Labour have been taken over by militant groups, driving out more moderate MPs.”