Boris Johnson begins his term as prime minister by assembling his team
Sajid Javid is the new chancellor, Priti Patel home secretary and Dominic Raab foreign secretary
It follows a large-scale clear out of cabinet, with Philip Hammond and Jeremy Hunt among those going
Liz Truss, Theresa Villiers, Amber Rudd, Michael Gove, Gavin Williamson and Andrea Leadsom also have roles
Mr Johnson promises the UK will leave the EU by 31 October and sets out his first policy aims in a wide-ranging speech
As Mr Johnson travelled up the Mall for his audience with the Queen, Greenpeace protesters attempted to block his route
Theresa May took her last Prime Minister's Questions and was clapped out of the Commons
Laura Kuenssberg
BBC political editor
Entering Downing Street is a huge moment - a head-spinner.
The challenge is the amount of people who need decisions from you.
The skill is learning is to learn to triage - to decide what is important.
Boris Johnson has held a lot of positions of power in his rollercoaster career.
This is something of a totally different order.
Today Programme
BBC Radio 4
Asked about US President Donald Trump describing Boris Johnson as "Britain Trump", Matt Hancock says Mr Johnson's politics are "progressive, modernising, one-nation politics".
"Look at what he did in London," says the health secretary, who was one of Mr Johnson's most prominent backers in the leadership race.
"It was about bringing a city together, lifting it up and giving it a sense of can-do positivity."
Trump on Johnson: 'They call him Britain Trump'
Laura Kuenssberg
BBC political editor
There is a frantic guessing game about the other big jobs.
One big hurdle is that the position of Jeremy Hunt is not yet resolved.
As I understand it, Boris Johnson is resolute he does not want Jeremy Hunt to stay as foreign secretary.
I understand he offered him the position of defence secretary but that was turned down.
Mr Hunt is firm he will not accept anything less than staying at foreign office, becoming chancellor or becoming deputy prime minister.
Today Programme
BBC Radio 4
"There is no way we are going to have any kind of electoral pact with the Brexit Party and Nigel Farage," Health Secretary Matt Hancock says.
"We are going to defeat the Brexit Party at a general election, which will be a long way off.
"I don't want to see an early election, Boris doesn't want to see an early election."
It comes after Brexit Party leader Mr Farage said he was open to an electoral pact with the Conservatives.
An electoral pact usually involves not fielding candidates in some areas, in order to give another party a better chance of winning.
Today Programme
BBC Radio 4
Asked how Boris Johnson will get a Brexit deal through Parliament, Health Secretary Matt Hancock says some MPs who previously opposed the Brexit deal are now changing their minds.
He also says he sees a "new dynamic" in Europe.
"We want to see a warm and constructive relationship with the EU," he adds.
Image source, EPABoris Johnson officially takes over as prime minister later.
But what does the top job actually involve? Find out here.
Today Programme
BBC Radio 4
Health Secretary Matt Hancock says he believes Boris Johnson will be able to unite people.
"The truth is he has the ability to bring people together across the divides because of his personality and his style - that is a real asset."
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Image source, Getty ImagesHealth Secretary and one-time leadership candidate Matt Hancock says "we will see a surprising amount of detail, especially on the domestic agenda" from the new PM.
"Boris is absolutely determined that as well as delivering Brexit we also put energy into the domestic agenda," he says.
"He feels there hasn't be enough attention on education, social care and extra police."
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Mohammed Amin, who chaired the Conservative Muslim Forum, told the BBC in June that he would resign his party membership if Boris Johnson won the leadership race.
Today Programme
BBC Radio 4
Asked if Labour would try to bring down the government by calling a vote of no confidence, shadow international trade secretary Barry Gardiner replies that it is "the nuclear option" which should be "used carefully".
He confirms "discussions are going on" between Labour and potential Tory rebels, who might support such a vote.
He goes on to describe Boris Johnson as "ill-informed and obdurately incompetent".
"It is really important he does not simply use bombast as a way of covering up his own inadequacies," he adds.
The BBC spoke to people in several locations around the country about their new PM.
Trump: Farage and Johnson 'are going to do tremendous things'
US President Donald Trump says he believes Brexit Party leader Nigel Farage and new UK PM Boris Johnson wilI "work well" together.
He made the comments during a speech to a right-wing youth organisation in Washington DC.
Today Programme
BBC Radio 4
Image source, PA MediaGavin Barwell (r) with outgoing PM Theresa May
Theresa May's chief of staff since 2017, Gavin Barwell, says there is "a mixture of emotions" in Downing Street today.
"There is pride at what we have achieved but huge frustration at what we weren't able to get done.
"She'll be emotional today but will want to depart with a clear message for the country."
Former MP Mr Barwell says he thinks Mrs May will stay on as an MP, adding she is "incredibly proud" to represent Maidenhead.
Want to find out more about the new prime minister?
BBC One is tonight showing a special news programme on the UK's new PM, as Boris Johnson takes office.
The New Prime Minister with Andrew Marr will be broadcast at 19:30 BST on Wednesday, 24 July.
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Image source, PADavid Cameron and his wife Samantha arriving in Downing Street in 2010
The former head of the civil service, Gus O'Donnell, explains what happens when a new prime minister arrives.
"It is quite a tricky time," he says.
"After greeting the staff they go into the cabinet room and that is where it all starts.
"I remember David Cameron putting his hands on his forehead and saying 'oh my God, this is real'.
"And it gets worse."
Nigel Farage: I would consider electoral pact with Boris Johnson
Brexit Party leader Nigel Farage has said there is a "possibility" of a pact with the Conservatives - if Boris Johnson is genuine about taking the UK out of the EU on 31 October.
An electoral pact usually involves not fielding candidates in specific areas, in order to allow another party a better chance of winning.
Today Programme
BBC Radio 4
German politician David McAllister says EU leaders have been "very clear" that the withdrawal agreement cannot be reopened.
However the MEP says they would be "open to changes to the political declaration about our future relationship".
Read more about the difference between the political declaration and the withdrawal agreement here.
Image source, PAYesterday was busy in SW1, but today is likely to be even busier.
Here is what is coming up:
BBC News Channel
Bronwen Maddox, the director of the Institute for Government think tank, says Boris Johnson's task of getting his Brexit deal through Parliament "may be impossible".
"He has this tiny majority which may only be two - and one defection could wipe that out.
"I think he will avoid bringing any legislation to Parliament because that give his opponents a chance to block no deal."