Ione Wells
Political Correspondent, BBC News

Truss is already handling PMQs in a much more serious manner to her predecessor, focusing on what policies she will introduce, rather than sprinkling in jokes - as favoured by Boris Johnson.

Labour leader Keir Starmer says Truss knows she will have to back an energy price freeze.

"The real choice, the political choice is who is going to pay?" he says, referring to the PM's opposition to a new tax hitting energy companies' profits to pay for help.

"Is she really telling us that she going to leave these vast excess profits on the table, and leave working people paying them for decades to come?" Starmer asks.

Image source, House of Commons

Truss thanks Keir Starmer for the welcome to her new job as PM, and says she hopes they can work together on some issues - such as opposing the Russian invasion of Ukraine.

She says she is indeed against a windfall tax on the profits of energy companies - saying this "puts off" companies investing in the UK economy.

Chris Mason
Political editor

"Three-nil!’ shouts a Conservative heckler as Sir Keir Starmer congratulates Liz Truss on becoming prime minister.

It’s a reference to the Conservatives having now had three women leaders. Labour haven’t had any.

Labour leader Sir Keir Starmer is now asking Liz Truss his first question.

After congratulating the new prime minister he asks: when she said in her leadership campaign that she was against a windfall tax on energy firms, did she mean it?

Chris Mason
Political editor

Those opening words from the new prime minister in the chamber were carefully prepared, not off the cuff — they were typed out, in what looks from here in the press gallery like biggish bold text in her ring binder.

Prime Minister Truss says she is honoured to take her place as prime minister in the House and take responsibility at a vital time for the country.

She says she is determined to deliver for everyone in the UK and that she will work with everyone there, not just Tories.

The Speaker says he hopes that Liz Truss will make any major policy announcements to the House first, after welcoming the new PM.

It's something he often had to remind her predecessor to do.

Ione Wells
Political Correspondent, BBC News

Huge cheers for Liz Truss from her backbenchers as the Speaker introduces her as “prime minister” for the first time. It’s a packed chamber, with everyone eager to see how she performs.

Here's the scene in the Commons - a packed room as MPs await their new prime minister.

She's due any minute.

Ione Wells
Reporting from the House of Commons

This is a big moment for Liz Truss. It’s her first Prime Minister’s Questions, with Dominic Raab usually stepping in for Boris Johnson on the occasions he couldn’t make it under his premiership.

Her tone will be remarkably different from her predecessor, who was known for his gaffes and jokes and often not very serious answers.

If her first speech as prime minister yesterday was anything to go by, she will strike a much more serious note. Fans of her may praise this - arguing it reflects the mood and urgency felt by the country.

But remember PMQs is, in part, a performance. The cheers and jeers of her own backbenchers will be a measure of how she performs.

Unlike the Tory leadership contest where she’s been able to perform a well-rehearsed speech to crowds of Tory members, she will now have to respond on her feet, in a chamber where it’s often too loud to even hear yourself think.

After Liz Truss mentioned "brilliant Britain" in her first speech as prime minister, Radio 5 Live has been hearing from their listeners what they think makes Britain brilliant.

Image source, Kate

Kate in Nottingham feels it's "harder and harder" to feel positive about the country.

"So many people are in different, difficult situations... especially with the cost of living crisis," she says.

But Simon in Somerset says he's grateful for all the privileges he has living in the UK - like the education his children are receiving, the NHS and community spirit.

"I look around the world... and what people around the world have to put up with," he says, "and I think; 'how lucky are we?'"

Michael in Cirencester moved to the UK from America in the hopes of raising his children in a "socially conscious" culture.

He worries the UK is moving towards an "American model" with a "villainisation" of the poor and a "high regard" for wealth and success.

Sandy in Thame, Oxfordshire, thinks Liz Truss will make a brilliant Britain if she achieves the three priorities set out in her speech.

"I want to see some results in the next year," she says.

Image source, Pool

Liz Truss has just left No10.

The new PM is on her way to the House of Commons - just a short distance from Downing Street, for her first Prime Minister's Questions.

Image source, Reuters

Ione Wells
Political Correspondent, BBC News

Image source, UK Parliament

This is going to be a big gear shift from Starmer vs Johnson. That was a personality clash, above all else, most of the time.

Rather than now trying to position himself as “the sensible one” against Boris Johnson, I’m told Starmer’s approach against Truss will be much more focused on policy, not personality.

Truss has certainly got a reputation for being more serious.

Today, it’s likely Starmer will be going on energy bills rising and what the PM will do to help people - as well as name dropping Labour’s plan for an energy price cap freeze, partly by extending the windfall tax on oil and gas companies.

With Truss expected to unveil plans tomorrow, this could be Starmer's last chance to make a big intervention on this point before the government gets its time in the spotlight selling its plan.

But it’s likely that differences over how to fund the support - with Truss and her new chancellor not keen on windfall taxes - will become the key sticking point.

We told you earlier that Johnny Mercer was removed from his job as veterans minister in Liz Truss's cabinet reshuffle.

Mercer's wife Felicity has voiced her discontent, tweeting last night that her other half was "sacked by an imbecile".

She's doubled down on her criticism today, saying she has "no regrets" and adding: "this is politics and PR".

Mercer, a former army officer, himself published a lengthy statement yesterday saying he would "consider [his] options". He wrote that he would have to accept he would "never possess the qualities required for enduring success in politics as it stands".

Downing Street has not directly addressed the comments from Johnny or Felicity Mercer.

The veterans minister brief is now held by James Heappey.

Chris Mason
Political editor

Image source, PA Media

After a long summer, it's the return of Prime Minister's Questions, and a change of opponent for the Labour leader Sir Keir Starmer.

Expect a focus from him on the cost of living and energy bills in particular.

I hear he'll say the oil and gas companies should make a contribution to the government's energy support package - rather than it being put on bills or paid for by borrowing.

His team reckon, and they don't mean this as a compliment, that it reveals Liz Truss's ideological instincts.

It was also pointed out to me that she used to work for Shell.

The prime minister is likely to play for time rather than setting out specifics of her plan - that will wait for tomorrow.

The challenge for Starmer, and his team are well aware of this, is not repeating the mistake, as they see it, that Rishi Sunak made in debate with Truss, and end up being accused of "mansplaining."

They hope his experience facing female rivals in the Labour leadership race a few years back will help.

The new chancellor has tweeted a photo of himself meeting business leaders this morning.

Kwasi Kwarteng says he discussed plans to tackle the cost-of-living crisis with the bosses of major banks.

The new government is under pressure to get a grip on soaring energy bills.

Ahead of Liz Truss's first prime minister's questions, you might be wondering what it's like to prepare for the gladiatoral weekly showdown.

Former Tory PM David Cameron told Politico's Westminster Insider podcast that even when things were going well, there was always a sense of "utter dread" in the minutes leading up to PMQs, a fear that so many things could go wrong and a feeling that you'd rather be anywhere else, doing anything else.

He recalls then-Chancellor George Osborne observing that it was the one time in the week that nobody on the benches behind you wanted your job.

Cameron remembers his adrenaline flowing and being relieved when the half-hour session was over.

Wednesday mornings were dominated by preparing for PMQs, he says - war-gaming with Osborne and Michael Gove what questions might come up, and how to handle them.

The aim was not to be "skewered, like a dead fish flapping on a beach".

Image source, PA Media

We've talked a lot about Liz Truss' first session of Prime Minister's Questions - affectionately referred to as PMQs - today. But we're aware that this doesn't mean much to some of our overseas readers. So here's the lowdown.

It's a weekly meeting, held every Wednesday that parliament sits, at midday. It's scheduled to last for 30 minutes, although it often lasts more like 40.

It gives elected members of parliament (MPs) the chance to ask questions of the prime minister directly, and it's chaired by the speaker of the house, Sir Lindsay Hoyle - who you'll often hear asking MPs to keep their cool.

It usually begins with PM outlining their engagements for the day, and then the questions begin.

In theory, the prime minister will not know what questions will be asked of them. However, they will be briefed in detail by government departments on likely subjects they could be asked about.

The Leader of the Opposition - Labour's Sir Keir Starmer - can ask a total of six questions. The speaker then gives other MPs a chance - but they're allowed just one.

We've talked a lot this morning about who's in the new cabinet, but who's gone?

None of those who backed her defeated rival, Rishi Sunak, will remain in her full cabinet, with Dominic Raab, Grant Shapps, George Eustice and Steve Barclay all returning to the backbenches. Former Home Secretary Priti Patel and former Culture Secretary Nadine Dorries are also out.

Here are the Conservative politicians that we won't be hearing so much of - in a front bench role at least: