Michael Gove stays as the chancellor of the Duchy of Lancaster, and minister for the Cabinet Office - a senior role within the cabinet.

Simon Jack
BBC Business Editor

This is the second most important job in the government - we are four weeks away from a budget.

And there were some really important ideas being discussed - inducing the idea of a mansion tax.

If you cast your mind back a couple of months Boris Johnson said the one person who was safe in his job was Sajid Javid.

Most people would say he has been a faithful lieutenant to the prime minister.

Perhaps Sajid Javid felt that having to get rid of his special advisers was a humiliation too far.

This blows the reshuffle wide open.

The BBC's political editor Laura Kuenssberg says this turn of events "will be shocking to some people".

She says she's already heard from one Tory minister who has called the move "insane".

If Mr Sunak takes the role of chancellor, this will be a "huge step up for him", she says.

As a backbencher, will Mr Javid be a thorn in the prime minister’s side?

"We will have to wait and see what Sajid Javid – who ran to be Conservative leader - will decide to do on the backbenches," she says.

"It may well be the start of something, rather than the end of one man’s time in cabinet."

Sajid Javid - a former home secretary - was appointed chancellor by Mr Johnson when he became prime minister in July.

The BBC's Political Editor Laura Kuenssberg said Mr Javid was offered to stay on as chancellor on condition he fired all of his advisers - he refused and turned down the job.

She said Mr Javid had resisted attempts to exert more control over him.

Read more on this developing story here

Image source, Getty Images

Sajid Javid has been MP for Bromsgrove since 2010 and was the first Asian man to be given a cabinet post.

He first joined the government in 2012 as economic secretary in the Treasury.

He rose through the ranks becoming home secretary in April 2018 and then chancellor in July 2019.

He was born in Rochdale but brought up in Bristol, where his Pakistani father worked as a bus driver. He went to comprehensive school and studied at Exeter University.

He worked for Deutsche Bank, rising to managing director before running for Parliament.

Laura Kuenssberg
BBC political editor

We were expecting this to be a relatively mid-scale reshuffle, with the budget in four weeks (on 11 March) this wasn't meant to be how the day would progress.

Downing Street has found themselves with a huge drama unfolding.

The budget - the biggest day in the year for the chancellor - is on 11 March.

Our political editor Laura Kuenssberg says Sajid Javid has decided that rather than obey the PM to sack his advisory team, he has turned down the second most important job.

Rishi Sunak is likely to be appointed chancellor in his place, she says.

Mr Javid was meant to be staying on despite the unhappiness between his team and Downing Street, our political editor says.

It is quite an extraordinary thing to happen at this stage of a new government.

He was meant to be delivering a budget in four weeks' time.

It's been confirmed that Sajid Javid has resigned.

Candidates in the race to replace Jeremy Corbyn as Labour leader have been facing questions on the BBC's Victoria Derbyshire show.

Here's what they said when asked if they had committed a crime:

You can watch the full debate here.

Next in is Rishi Sunak, chief secretary to the Treasury. He is smiling as he arrives.

Taoiseach Leo Varadkar - who is acting as Irish PM until a deal is agreed for a new government after the Irish elections - calls sacked minister Julian Smith "one of Britain's finest politicians of our time".

Departing ministers may worry about their next career move, but Labour MP Nick Thomas-Symonds is here to help...

(In fact, Mr Cox is also a barrister who founded the Thomas More Chambers in 1992 and was appointed as a QC in 2003. He ceased private practice after becoming attorney general.)

BBC News Channel

The Financial Times' Sebastien Payne tells the BBC Julian Smith’s departure was “a bit of a surprise because he had been widely praised for getting Stormont up and running".

“There has been some bad blood between Downing Street and Julian Smith partly over assurances in the power sharing agreement - particularly due to [the issue of] crimes committed during the Troubles.

"There was some talk that maybe the prime minister was blindsided by decisions made by Mr Smith - of course Mr Smith would deny that was the case."

But Sky's Tamara Cohen tweets, external that Mr Smith's sacking was due to comments at the height of the Brexit tension last autumn when he told MPs no deal would be "very, very bad for Northern Ireland".

International Development Secretary Alok Sharma is next in.

Justice Secretary Robert Buckland has gone into Number 10 as well.