Theresa May says there are "no limits" to the UK doing trade deals once the UK leaves the European Union.

"We will do a trade deal with the US and others around the world," she says.

The first question comes from the BBC's Laura Kuenssberg.

She asks if the president's criticism of Mrs May was the behaviour of a friend.

Mr Trump denies criticising the prime minister.

He says the only thing he asks of Mrs May is for the US to be able to trade with the UK.

"I believe after speaking with the prime minister's people and trade experts a deal will be possible," he says.

Coming on to Brexit, Donald Trump says: "I don't know what they're [the UK] going to do but whatever you do is OK by me."

"That's your decision," he says adding "just make sure we can trade together that's all that matters".

Donald Trump said he and the PM had discussed a "range of shared priorities including stopping nuclear proliferation".

"The prime minister and I also discussed Iran. We both agree than Iran must never possess a nuclear weapon."

Theresa May has said she and Donald Trump have agreed to pursue a free trade deal when the UK leaves the EU.

"With mutual investment between us already over $1 trillion we want to go further...

"The Chequers agreement reached last week provides the platform for Donald and me to agree an ambitious deal," she said.

Donald Trump now speaks.

He calls it "a true privilege to visit historic Chequers" which he says he heard about "growing up in history class".

He describes his tour of the Winston Churchill exhibit at Blenheim Palace as "something very special".

Theresa May says they discussed Russia and that she thanked President Trump for responding to the nerve agent attack in Salisbury.

She says they agreed on the importance of engaging Russia "from a position of strength and unity" as well as countering "efforts to undermine our democracies".

The news conference starts and Theresa May begins by welcoming Donald Trump to Chequers.

"No two countries do more together to keep their countries safe and prosperous," she says.

The media are ready and waiting for their press conference with Donald Trump and Theresa May to begin.

Jennifer Scott
BBC News

Thousands of protesters, mainly women, have flooded the streets of central London to protest against Donald Trump and determined to make as much noise as possible.

The crowd is full of whistles, drums and the all important pots and pans that seem to have become a symbol of this movement.

Whilst the mood is jovial, their motivation is serious. Most of those I've talked to are here because of Trump's immigration policies, especially after the recent pictures from the Mexican border.

There are also countless signs regarding his attitude to women, which I'm sure you will understand, I'm unable to repeat.

Clearly, the anger hasn't stopped the visit and a state one is on the horizon. But the palpable outrage is unlikely to subside before then and when he returns to central London, I think these protesters will too.

President Trump has fiercely criticised the prime minister's Brexit plan, saying it would "probably kill" any trade deal with the US.

His comments came in an interview with The Sun newspaper.

Tom Newton Dunn, the paper's political editor, said the comments were the last thing that Theresa May needed - but that they might unwittingly help her.

The press conference of Donald Trump and Theresa May is due to start soon.

Journalists are now taking their seats in the sunshine.

BBC assistant political editor Norman Smith predicts that the upcoming press conference between Theresa May and Donald Trump would be "less High Noon and more lovey dovey" with both leaders going out of their way to stress their friendship.

But, he said, the fact they would have to put on such a performance underlined how damaging Mr Trump's intervention in The Sun, external had been.

The danger is that many will conclude that Mr Trump is both dismissive of Mrs May's approach to Brexit - and of her as prime minister.

A reminder of the welcome given to the US president last night.

Here's a closer look at the aircraft that has been seen in the skies since President Trump arrived yesterday.