The outgoing home secretary says she is resigning with the greatest regret:

"Earlier today, I sent an official document from my personal email to a trusted parliamentary colleague as part of policy engagement, and with the aim of garnering support for government policy on migration.

"This constitutes a technical infringement of the rules. As you know, the document was a draft Written Ministerial Statement about migration, due for publication imminently. Much of it had already been briefed to MPs. Nevertheless it is right for me to go.

"As soon as I realised my mistake, I rapidly reported this on official channels, and informed the Cabinet Secretary. As Home Secretary I hold myself to the highest standards and my resignation is the right thing to do.

"The business of government relies upon people accepting responsibility for their mistakes.

Suella Braverman has shared the resignation letter she sent to the PM:

Chris Mason
Political editor

The BBC understands that the prime minister was advised that the ministerial code had been breached.

The resignation is expected to be confirmed by No 10 very soon.

Ione Wells
Political Correspondent, BBC News

Suella Braverman - now out of one of the top roles in government - adds further chaos to this week for the prime minister, at a time when those in No 10 are desperate to show unity and stability in government.

She was firmly on the right of the party, and her departure from government may well trigger further upset from some of her political allies, such as those who backed her to be the Tory leader.

Her replacement, however, could be another opportunity to try and bring in someone who isn’t a natural political ally in the Tory party and attempt to bring other MPs back on side.

Chris Mason
Political editor

The home secretary and the prime minister met this afternoon in Parliament for a face-to-face meeting.

This is an emerging story - with plenty of details not yet nailed down.

Politics has been moving fast - and it's just getting faster and faster.

Chris Mason
Political editor

My understanding is Suella Braverman's resignation was not over a disagreement about government policy, but instead what was described to me as an honest mistake on the part of the now former home secretary.

Image source, Reuters

Suella Braverman has resigned as home secretary, the BBC has confirmed.

The Sun and the Guardian newspapers are reporting that Suella Braverman is out as home secretary.

The BBC has not yet been able to confirm this.

We’ll bring you more as soon as we can.

Braverman was appointed by Liz Truss in September, after being promoted from serving as attorney general under Boris Johnson.

If you're just joining us or are in need of a catch up, here four key things we have learned so far:

Pensions triple lock to stay

In a surprise revelation at Prime Minister's Questions earlier, Liz Truss confirmed she will raise state pensions in line with inflation (currently at over 10%) next year.

This means her government will maintain its manifesto commitment to the "triple lock" policy, whereby pensions rise by whichever is the highest of inflation, average wage rises, or 2.5% a year.

No guarantee for benefits

Unlike pensioners, Truss did not make the same commitment to those who receive state benefits, when asked by a Tory backbencher if they would also rise by inflation.

Truss didn't directly answer the question, but did note that the government were "compassionate Conservatives", which she said was shown by the energy price guarantee keeping bills down until April.

Questions about leadership remain

At a fiery PMQs Labour leader Sir Keir Starmer read out a list of Truss's abandoned economic policies, to which she replied telling MPs she was "a fighter, not a quitter"

But trouble is brewing for the PM, with one senior Conservative MP confirming he had lodged a letter of no confidence in her

Fracking

On the subject of upcoming problems for Truss, Labour have lodged a vote for this evening on the controversial issue of fracking, attempting to force the introduction of a draft law to ban the extraction of shale gas in England

Tory MPs have been ordered to oppose the move to ban fracking - forcing them to demonstrate their loyalty to Liz Truss and making it what they call a "confidence vote" in Parliament.

Reality Check

Liz Truss was accused by Labour of “crashing the economy” at PMQs this lunchtime, and causing people’s monthly mortgage payments to go up by hundreds of pounds.

In response, the PM didn’t mention the mini-budget and replied: "Interest rates are rising across the world and the economic conditions have worsened.”

While that is true, her government’s mini-budget on 23 September also had a significant impact on the financial markets.

In a letter to MPs on the Treasury Committee yesterday, Bank of England deputy governor Jon Cunliffe said: “There has been a particular increase in volatility in UK markets” and pointed out that: “The five largest daily moves in the 30-year inflation-linked gilt, in data that dates back to 2000, have all been since the 23 September”, which was when the mini-budget was unveiled.

Gilts are a form of IOU which the government sells in order to borrow money to fund its spending plans.

You can see from this chart which Cunliffe included that UK gilts (turquoise line) have risen by more than those for the US or the Euro area since 1 September, with a spike after the mini-budget.

Image source, Bank of England

This increase in the cost of borrowing for the government also fed into things like higher mortgage rates for homebuyers and had an adverse impact on the pensions sector - this is what forced the Bank of England to step in with a £65bn support scheme.

You can read more about it here.

Image source, Getty Images

Another Tory MP has said that he no longer supports Liz Truss as prime minister.

William Wragg says he has written to Graham Brady to say he has no confidence in the PM.

Brady is the chair of the 1922 committee of backbench Conservative MPs, and he's the person who collects letters from his fellow Tory MPs who want the PM to go.

Under Conservative Party rules, Truss is safe from a confidence vote for a year after entering office - but the rules could be changed, theoretically, if enough MPs want it.

Wragg said he wanted to vote with Labour on this evening's motion on fracking - but couldn't as he didn't want to be suspended from the parliamentary Tory party (known as losing the whip).

The government has told Tory MPs that they must not vote with Labour on the motion.

Wragg said in the Commons that he didn't want to lose the whip - or indeed his own position as vice-chair of the 1922 committee - as the letter he has sent to Brady would no longer count.

On Sunday, Tory MPs Crispin Blunt, Andrew Bridgen and Jamie Wallis called for Truss's resignation.

Those three plus Angela Richardson, Sir Charles Walker, Steve Double and now Wragg make a total of seven MPs who have publicly called for Truss to go.

• How might Tory MPs get rid of the prime minister?

Chris Mason
Political editor

Warning: This post contains strong language

We reported earlier that one of the PM's most senior staff had been suspended and would be investigated by Whitehall’s Propriety and Ethics team.

The prime minister's official spokesperson has been asked about the suspension; they refused to refer to Jason Stein by name, but told reporters: "The prime minister has made very clear that some of the briefings are completely unacceptable and must stop."

This was a reference to briefings to newspapers from those around her who can speak on her behalf, which contained strong language.

Over the weekend, the Sunday Times reported that Liz Truss was of the view that the former Chancellor and Health Secretary Sajid Javid was "shit".

Javid had been seen by some as a possible replacement for Kwasi Kwarteng as chancellor, but Jeremy Hunt was picked instead.

Asked if Stein had offered his resignation, a Conservative source said "that is not my understanding".

Stein used to work as a communications adviser to Prince Andrew.

I have approached Stein for comment. He has not yet replied.

Read my full report here.

Missed PMQs and want to catch up in under a minute?

You're in luck - we've captured the key moments in this short video:

Image source, EPA

Liz Truss and Chancellor Jeremy Hunt jointly agreed to guarantee that the state pension rises with inflation next year - thereby maintaining the "triple lock" - ahead of PMQs this morning, Downing Street says.

In a huddle with reporters after PMQs, the prime minister's official spokesman said the decision reflected the "unique position" of pensioners who are "unable to increase their earnings through work".

The triple lock is a long-standing Conservative policy, introduced by the Tory/Lib Dem coalition, of annually lifting pension payments by whichever is the highest out of:

• price rises (inflation)
• the average growth of earnings
• 2.5% a year

Currently the inflation rate stands at around 10%, whilst the figure for average earnings is 5.4%.

The Conservatives also pledged to stick by the triple lock in their 2019 general election manifesto.

Truss's spokesman told gathered journalists that the government's priority is to "protect the most vulnerable".

He wouldn't say if the PM had overruled Hunt - but when asked if they were working in "lockstep", he said they were.

Prime Minister Liz Truss has cancelled a planned visit to a British-owned electronics manufacturer this afternoon.

The visit was included in the government business for the day - but Downing Street now says the prime minister won't be going.

They haven't given a reason for the cancellation - we'll let you know if we hear more.

Iain Watson
Political correspondent

After new Chancellor Jeremy Hunt came in, Downing Street sources had briefed that nothing was off the table when it came to spending cuts.

But last night, while speaking her MPs behind closed doors, Truss re-committed herself to raising defence spending substantially by 2030, an issue which is a "red line" for her defence Secretary Ben Wallace.

And under pressure from backbench MPs, the prime minister agreed to an inflation-proofed increase in pensions at PMQs earlier today.

In the process she is perhaps clawing back some ground from Hunt, though Number 10 sources insist the pensions announcement was agreed with Number 11 (the traditional residence of the chancellor).

After PMQs I spoke to a Conservative MP who had raised concerns over the possible ditching of the pensions triple lock.

I'm told the PM had "discussions" yesterday with those who had expressed concern and had blamed a "comms problem".

The MP was delighted to hear the PM commit to the triple lock and felt "increasingly confident" that the link between benefits and rising prices - not committed to today - would be confirmed on 31 October.

But the PM's position, they said, remained "volatile".

The government has changed tack, guaranteeing pensions will rise in line with inflation after previously refusing to make that commitment.

As our political editor Chris Mason noted earlier, this followed a series of damning headlines in today's newspapers.

Even generally supportive papers like the Daily Mail were reporting that millions faced "pain" if they were to miss out on around £430 a year - that's how much it thinks people stood to lose if the state pension was lifted by 5.5% (average wage growth) and not 10% (the rate of rising prices).

The paper went on to describe the apparent plan as, at the time, a "surprising U-turn" on longstanding Tory policy.

As we've been reporting, there is now no U-turn - or perhaps a U-turn on a U-turn: pensions will rise in line with inflation, Truss says.

Image source, The Daily Mail

Another paper which led on the government's indication that the triple lock would go was the i, which also noted that Conservative MPs "reacted with incredulity" to the apparent plan.

Image source, The i

Nick Eardley
Chief political correspondent

The government has made a vote related to fracking this evening a confidence issue – telling its MPs they must vote against Labour taking control of the order paper.

The BBC has seen a message sent to Tory MPs – telling them they must vote with the government.

The message says: “This is a confidence motion in the government.

“We cannot, under any circumstances, let the Labour Party take control of the order paper and put through their own legislation and whatever other bits of legislation they desire.

“We are voting NO and I reiterate, this is a hard three-line whip with all slips withdrawn.

“We then come onto the Government amendment which is also a three-line whip.

“I know this is difficult for some colleagues, but we simply cannot allow this. Please speak with your whip with any issues.”

It was a feisty session of Prime Minister's Questions, where Labour leader Keir Starmer made jokes at Liz Truss's expense. Here's the main things you need to know:

• Truss said she was "completely committed" to raising pensions in line with inflation, per the "triple lock" guarantee. Her chancellor said on Monday the government could not commit to it
• Truss did not make the same promise to raise benefits in line with inflation when asked to by a Tory MP
• Starmer read out a list of Truss's abandoned economic policies - she replied telling MPs she was "a fighter, not a quitter"
• The Labour leader said Truss had "crashed" the economy and pointed out her previous promise of "no spending reductions" - her new Chancellor Jeremy Hunt now says there will be cuts. In response, Truss said spending would rise, but the government needed to get value for taxpayers' money
• Truss opened PMQs by saying she was "sorry" and accepted she had "made mistakes" on the economy following her U-turns