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More than 600 Labour councillors have signed a public statement calling on Jeremy Corbyn to resign as leader and “make way for the new leadership”.

It is the biggest sign yet of pressure from the party’s grassroots on Corbyn to go, and follows several no confidence motions passed by local constituency Labour parties (CLPs), including Battersea and Tooting. Holborn & St Pancras CLP, meanwhile, last night rejected a pro-Corbyn confidence motion – suggesting that Corbyn’s supposed strong London support base is not as rock solid as some presume.

The letter is signed by more than 600 Labour councillors, who claim a breadth of opinion within the party and say they are “from a number a traditions within our movement”, including some who voted for Corbyn last year.. They praise Corbyn as “an honourable man” and credit his record of public service, particularly in local government.

However, they say he is “unable to command the confidence of the whole party”, and say a new leadership is needed to represent communities at a time when the “country is facing a crisis” in the wake of last week’s Brexit vote.

The organisers point out that they have collected more than double the number of councillors’ signatures that were put to a similar pro-Corbyn letter yesterday.

One of the organisers of the letter, Lambeth councillor Ed Davie, said: “Across the country Labour councillors speak to millions of people and, sadly, they know that Jeremy Corbyn’s leadership is deeply unpopular. At a time of national crisis it is more important than ever that we have a competent Labour leader that can communicate with and commands the support of voters and councillors as well as MPs.

“In just 12 hours more than twice as many Labour councillors signed this grassroots letter calling on Jeremy Corbyn to resign than a similar effort by the well-resourced leader’s office.

“From Cornwall to Newcastle, Glasgow to Suffolk 540 councillors including council and group leaders have called on the leader to resign. Clearly deep unhappiness with the leadership is felt throughout Labour’s grassroots and in local government as well as in parliament. For the good of the country, our communities and party it is time for a fresh start.”

You can read the full letter and list of signatories here:

As Labour councillors we support the recent call from colleagues for new leadership at the top of our party.

Jeremy Corbyn is an honourable man with a record of public service stretching back more than four decades, not least in local government.

We are drawn from a number of traditions within our movement, including those who voted for Jeremy last year.

It has now become clear, however, that he is unable to command the confidence of the whole party nor of many traditional Labour supporters we speak with on the doorstep.

Our country is facing a crisis – and the neighbourhoods we represent are on the front line. We urge Jeremy Corbyn to make way for the new leadership that our communities so desperately need.

Yours sincerely,