Boris Johnson news - live: Williamson, Raab and Patel return to government as new PM continues biggest cabinet reshuffle in modern history

Dominic Cummings is set to be appointed an adviser to Boris Johnson, despite being found in contempt of parliament over an inquiry into “foreign influence and voter manipulation” in the Brexit vote.

The new prime minister is expected to take the hugely controversial step of inviting the head of the Vote Leave campaign – and the brains behind the notorious “£350m-a-week for the NHS” claim – into No 10.

The move was immediately condemned by Sarah Wollaston, a former Conservative, now Independent, MP as “shameful”.

Theresa May has now left Downing Street to head to the House of Commons for her final session as Prime Minister's Questions.

Sir Mick Davies, a treasurer and chief executive at Conservative Party Headquarters, has resigned from his position before Boris Johnson enters Downing Street.

In a letter, posted on the Conservative Home website, he says: "I have so much enjoyed my time as Treasurer and CEO, but circumstances change and I think that our new leader, Boris Johnson, should be free to choose a team at CCHQ who can work together to ensure that this organisation realises its central purpose – a clear and decisive victory at the next General Election."

The letter - addressed to Tory donors - adds:  "I am writing to ask you to get behind our new leader, Boris Johnson, and make sure CCHQ can deliver. Good politics is not a cheap exercise and if we are not properly resourced and financed we will risk a very bad outcome – Jeremy Corbyn in Number 10.

"You all know that one of my great bugbears has been the lack of unity in our party. Divided parties do not win elections. Brexit with all its complexities and associated dogmas provides the unfortunate backdrop for division but if we are to effectively stand against the frightening threat of a Corbyn led Labour Government we all must find a basis of coming together.

"Our new leader and prime minister can only be effective if a strong and unified party stands behind him. One of the key roles of CCHQ is to facilitate that outcome but I am asking you our donors, upon whom we depend, to embrace that call for unity as well. There is today no room for bystanders – my successor will need your help and I hope that you will step forward right now and send a powerful message of unity, purpose and commitment."

"Theresa May tried hard to have a meaty domestic agenda beyond Brexit but ultimately failed," writes The Independent's political commentator Andrew Grice. "Brexit consumed the government machine and left little bandwidth for much else."

He adds: "Boris Johnson will try to learn from her mistakes – and his own very obvious lack of a plan on the morning after the 2016 referendum after leading the Vote Leave campaign to an expected victory."

Here are six urgent priorities beyond Brexit on which Prime Minister Johnson needs to make his mark ––

PMQs has now started. Theresa May says she will continue to be the MP for Maidenhead after handing in her resignation to the Queen later this afternoon. 

Asked how she felt about handing over a man who "demonises Muslims" and promises to sell the country out to Donald Trump.

Ms May says she is pleased to hand over to someone who was in her cabinet (until he walked out) and who is committed to delivering a bright future for this country, she says.  

Jeremy Corbyn says he pays tribute to the prime minister sense of public duty, and to the pressure on herself and family.

He asks whether she will join him on the backbenches to oppose the reckless plans of her successor. However, he says in the last three years he says poverty in various areas has gone up. 

Ms May says at its heart politics isn't about exchanges across the Commons despatch box, it's about the difference they make to the lives to people across the country.

Corbyn says he welcomes the reduction of fixed odd betting terminals, child funeral payments - all of course put forward by backbenchers, not the PM.

He says on Brexit, her successor has no mandate at all. 

Asked whether she has confidence her successor will have a greater chance of succeeding, Ms May accuses the Labour leader of "walking away from the talks" and "playing party politics". 

"He should be ashamed of himself."

Corbyn says her successor should call a general election and let the people decide their future in his final comments to the PM. 

May says, however, that Corbyn has broken "promise after promise".

But she adds "it is the strength of the British democracy" that the leader of the opposition and the PM can have these exchanges across the despatch box. "What I think we both have in common is a commitment to our constituencies."

She concludes: "As a party leader who has accepted her time is up, perhaps now it is time for him do the same."

Ian Blackford, the SNP leader at Westminster, says the time for holding the PM to account is considerable. He asks whether she is confident the office of PM can be held by her successor, Boris Johnson. 

She says she congratulates Mr Johnson and looks forward to a "first class" government.

May says her successor will continue to deliver the Conservative policies to "improve people's lives" and she looks forward to giving her "full support" to the new prime minister.