Giant projections of Donald Trump alongside paedophile Jeffrey Epstein have been beamed on to Windsor Castle by protesters as the US president arrived in the UK for his second state visit.
Mr Trump has faced mounting questions about his relationship with the disgraced late billionaire after messages allegedly sent to him by the US president were published by Congress earlier this month.
Follow Trump’s second state visit live
The apparent notes – which Mr Trump denies having written – appeared in a 2003 “birthday book” for Epstein.
Four people were arrested on “suspicion of malicious communications” after the images of Mr Trump and Epstein appeared on the landmark, Thames Valley Police said.
Two men were also arrested for breaching airspace restrictions in place for Mr Trump’s visit.
The president is being feted with a stay in Windsor Castle, where he will be hosted by the King and treated to a ceremonial welcome on Wednesday and later, a lavish state banquet.
The Prince and Princess of Wales will meet the president and first lady Melania Trump in the grounds of the Windsor estate, where he will spend the day, before heading to the prime minister’s country residence Chequers on Thursday.
It is hoped the Queen – who pulled out of attending the Duchess of Kent’s funeral on Tuesday after suffering from acute sinusitis – will recover in time to attend the busy run of royal events.
Read more: No one does pomp better than Britain
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There are no public-facing engagements for the president throughout his 48-hour state visit, with thousands of people expected to take part in a major protest against his stay in central London today.
The Metropolitan Police said it is preparing for “a significant operation” with as many as 50 protest groups expected to take part.
More than 1,600 officers will be deployed, including 500 assisting from other forces.
The Prince and Princess of Wales will greet the president and his wife in the grounds of the Windsor estate in the morning, before accompanying them to meet the King and Queen for an open-air greeting.
Mr and Mrs Trump, the King, Camilla, William, and Kate will then take part in a carriage procession through the estate to the castle, with the carriage ride joined by the Household Cavalry Mounted Regiment, which will provide a Sovereign’s Escort, as well as members of the armed forces and three military bands.
A ceremonial welcome with a guard of honour will be staged in the quadrangle of the castle, as is customary, followed by lunch with the royal family and a visit to see a Royal Collection exhibition within the castle.
The president and his wife will then visit St George’s Chapel privately on Wednesday afternoon to lay a wreath on the tomb of Queen Elizabeth II, whom they both met on their first state visit.
They will then be treated to a flypast by the Red Arrows alongside UK and US F-35 military jets on the east lawn at Windsor Castle, as well as a special Beating Retreat military ceremony.
They will then be treated to a flypast by the Red Arrows alongside UK and US F-35 military jets on the east lawn at Windsor Castle, as well as a special Beating Retreat military ceremony.
The traditional grand state banquet is set to follow in the castle’s St George’s Hall in the evening, with both Mr Trump and the King to give speeches as the event gets under way.
A small group of protesters from the Stop Trump Coalition were in Windsor on Tuesday night.
Two protesters from the activist group Fossil Free London were escorted out of a dinner organised by Republicans Overseas UK at Windsor Guildhall in the Berkshire town.
They chanted “how many will you kill if you drill baby drill” and unfurled a banner that said: “Oily Money Kills” at the event.
Speaking to reporters mid-flight, Mr Trump said: “My relationship is very good with the UK, and Charles, as you know, who’s now King, is my friend.
“It’s the first time this has ever happened where somebody was honoured twice. So, it’s a great honour.”
He told the journalists “everybody is looking forward to it. You’re going to have the best pictures”.
