WELSH MP Stephen Crabb has declared he will run to replace David Cameron as Prime Minister, it is being reported.

The Work and Pensions Secretary is thought to be working with business secretary Sajid Javid, with the Pembrokeshire politician going for party leader and Prime Minister and Mr Javid as Chancellor in what has been dubbed as the ‘blue-collar dream team’.

A group of senior Conservative backbenchers, known as the 1922 Committee, agreed that a new prime minister should be in place by September 2, and that two MPs should run together on a joint ticket, the same as when David Cameron became party leader in 2005.

The nominations for the leadership open tomorrow (Wednesday) and close on Thursday at noon.

Mr Crabb has yet to officially comment.

It is understood he will officially declare his intention to stand on Wednesday.

Favourite for the top job however is Boris Johnson, who was a leading campaigner for Leave during the EU Referendum, along with fellow Leave campaigner and Andrea Leadsom, Minister of State for Energy.

Other leading Conservatives believed to be throwing their hats in to the ring include Health Secretary Jeremy Hunt, Home Secretary Theresa May, Education Secretary Nicky Morgan and former Cabinet minister Liam Fox.

The current chancellor, George Osborne has said he won’t be running, as has Leave campaigner Michael Gove.

On Monday, Mr Crabb told the media: “This is a really serious moment for our country. We need stability, we need direction and what I want to see over the next few days is a candidate emerge who understands the enormity of the situation that we are in, and who has got a clear plan, a clear plan to deliver on the expectations of the 17 million people who voted for Britain to come out of Europe last week; who’s got a clear plan for putting together a team who can lead a tough negotiation in Brussels but who’s also got a plan for holding this United Kingdom together.

“And that means, yes, going and working with Nicola Sturgeon and holding onto the Union.

“Because this isn’t just about party unity now, it’s about national unity.”

Mr Crabb was first elected to Preseli Pembrokeshire in 2005.