Donald Trump is set to touch down in the UK for a whirlwind three-day visit that will bring protests by NHS workers and disruption for Londoners.
As impeachment hearings continue in Washington, Trump is making his third visit to the capital as US president, this time for a Nato security summit that includes a reception hosted by the Queen.
His visit comes as he faces a fight for his political life back at home and pressure from Prime Minister Boris Johnson not to meddle in the general election campaign.
NHS workers are planning a protest outside Buckingham Palace and Londoners have already complained about the thundering noise of US military helicopters flying over the city.
Here is everything you need to know about Trump’s visit, which also comes just days after a terror attack on London Bridge.
How long is Donald Trump here?
The president and first lady Melania Trump will spend three days in London after Air Force One touches down at Stansted Airport in Essex at 9.45pm UK time on Monday.
From there, they will immediately board the Marine One helicopter and fly to Winfield House, the US ambassador’s residence at Regent’s Park, landing at 10.20pm.
Trump’s first scheduled events will take place on Tuesday as the summit marks Nato’s 70th anniversary in the city where it had its first headquarters.
The summit will conclude on Wednesday afternoon.
A ring of steel will be set up around Trump and the summit, with hundreds of police officers involved.
The overall cost of policing Trump’s first visit to the UK, in July 2018, amounted to £14.2million.
It was estimated that his state visit in June this year would end up costing taxpayers an estimated £40million for security alone.
Why is the US president here?
Trump and other Nato world leaders are attending a two-day summit on international security.
One of the most high profile events is a reception at Buckingham Palace on Tuesday evening.
It is hosted by the Queen and it will be attended by other senior royals, including Prince Charles and Kate Middleton, whose husband, Prince William, is on an official visit to the Middle East.
The Queen and Charles will pose for a group photo with the leaders.
From there, the leaders will go to Downing Street for a reception hosted by Mr Johnson.
Trump plans to discuss topics such as defence spending and hacking threats during his conversations, according to the White House.
He has one-on-one meetings scheduled with French President Emmanuel Macron and German Chancellor Angela Merkel, but so far isn’t planning a head-to-head with Mr Johnson.
A White House official told the New York Times that Trump was “very conscious of the fact that we do not interfere” in other country’s elections.
Mr Johnson has been trying to distance himself from the president amid claims the Tories would put the NHS up “for sale” in a future trade deal.
On Wednesday, the Nato heads will gather at the five-star Grove hotel on the outskirts of Watford, Herts, where Trump is expected to hold a press conference after a three-hour session.
Each leader is given four minutes to speak during the session.
Afterwards, Trump and Melania will head to Stansted and fly back to Washington.
Who is protesting?
A number of protests are planned while the Trumps are in London.
Namely, NHS doctors, nurses and other workers, who will gather in front of Buckingham Palace during Tuesday night’s reception.
Thousands are expected at that demonstration to highlight potential risks to the NHS in a future US-UK trade deal.
The protesters will march from Trafalgar Square up the Mall and gather at Canada Gate.
It is not yet clear if Labour leader Jeremy Corbyn will address the crowd in Trafalgar Square.
The Trump baby blimp is not expected to make a reappearance.
Will there be disruption?
There will be some disruption in London and Watford, including road closures and police escorts, as Nato leaders attend the events.
Londoners have already complained about the noise from Chinook helicopters that have been flying over the capital since Saturday.
One of Trump’s armoured limousines has also been spotted amid extra security measures, including barricades, in Regent’s Park, where the first couple will stay.
When Trump travels by road he is in a limo, dubbed The Beast, and is accompanied by an enormous entourage, including a decoy, to protect him.