President Trump was greeted by the King and Queen as well as other senior royals at Windsor Castle.
It is his second state visit to the UK and is accompanied by the usual pomp and pageantry.
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Bands played during the final preparations for the ceremonial greeting and troop inspection by the King and President Trump
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Bystanders took photographs as the Marine One helicopter departed from Winfield House, the US Ambassador’s residence in central London
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President Trump disembarked from Marine One at Windsor Castle alongside First Lady Melania Trump
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The pair were greeted by the Prince and Princess of Wales
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The first lady arrived at Windsor Castle wearing a wide-brimmed purple hat
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All four walked to meet with King Charles and Queen Camilla
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For the second time, Donald Trump was greeted by a British monarch on a state visit
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The first lady, the Queen and the Princess of Wales chatted in a separate group nearby
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President Trump shook hands with King Charles and the two were in deep conversation outside Windsor Castle
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The Trumps, the King, the Queen and the Prince and Princess of Wales then stepped into the royal carriages
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King Charles and President Trump were first in the procession, travelling in the Irish State Coach
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Queen Camilla and First Lady Melania Trump were together in the Scottish State Coach
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In the next carriage – a semi-state landau model – were the Prince and Princess of Wales, joined by the US ambassador and his wife
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The 1.8km (1.1 mile) procession through Windsor grounds was closed to the public
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The carriages arrived at the Quadrangle where a British Army guard of honour was ready for inspection
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The American and British national anthems were performed by the Massed Band of the Grenadier Guards, Coldstream Guards and the Scots Guards
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King Charles and President Trump inspected the guard of honour
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They chatted as they made their way around
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In central London, away from the pomp and pageantry in Windsor, a large anti-Donald Trump protest gathered close to BBC HQ for the beginning of a demonstration
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The protesters gathered at the Parliament Square to take part in a ‘Trump Not Welcome’ rally
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President Trump and First Lady Melania Trump were welcomed by the King and Queen at Windsor Castle’s Green Drawing Room
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A special exhibition had been laid out to celebrate the UK’s relationship with the US
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Among the items on display was the Generall Historie of Virginia, New England and the Summer Isles by John Smith, published in 1624
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The First Lady kept her hat on indoors, unlike the Queen who removed hers
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Next on the itinerary for the president and first lady was a trip to St George’s Chapel where a number of former monarchs are buried
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They were greeted by the Dean of Windsor, the Rt. Rev. Christopher Cocksworth, and the Chapter Clerk, Miss Charlotte Manley
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While there, they laid a wreath at the tomb of Queen Elizabeth II
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The pair were also given a brief tour of the chapel, and saw Henry VIII’s vault
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Choristers sang the first movement from Vivaldi’s Gloria for them before they return to Windsor Castle
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The United States Army Old Guard Fife and Drum Corps pictured preparing for the performance
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Queen Camilla, King Charles, President Donald Trump and First Lady Melania Trump observed the rendition of the Beating Retreat
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The military ceremony originated in the early years of organised warfare
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Two hundred UK and US musicians performed for their majesties and their American guests
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The president and first lady were seated alongside the King and Queen for the performance
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The Band of His Majesty’s Royal Marines Portsmouth, the Band of the Scots Guards, British Army and the Central and College Bands of the Royal Air Force performed
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Prime Minister Sir Keir Starmer and Lady Victoria Starmer also attended the special military musical performance
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The red, blue and white smoke from the Red Arrows flypast filled the skies over Windsor Castle
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After a busy day of ceremony in Windsor attention turned to the state banquet
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Those attending had three dishes from a set menu alongside a variety of drinks
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Queen Camilla, King Charles, President Donald Trump and First Lady Melania Trump, posed for a family photo ahead of the banquet
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The Prince and Princess of Wales formed part of a procession of people making their way in
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