Donald Trump’s helicopter was forced to make an emergency landing while taking the US President and his wife Melania to Stansted Airport.
Marine One was forced to land as it was travelling from Chequers to the London airport after Mr Trump finished a joint press conference with Prime Minister Sir Keir Starmer, ending his historic second state visit.
White House press secretary Karoline Leavitt said that the helicopter had landed “out of an abundance of caution”.
Mr Trump and the first lady were later seen waving after arriving at Stansted Airport.
Ms Leavitt said in a statement: "Due to a minor hydraulic issue, and out of an abundance of caution, the pilots landed at a local airfield before reaching Stansted airport.
"The president and first lady safely boarded the support helicopter.
"The president and first lady were later able to board Air Force One for the return journey from the UK."
The Trumps are understood to have arrived at Stansted around 20 minutes behind schedule.
Mr Trump reportedly later joked about having a safe flight while taking questions from reporters on the presidential plane, Air Force One.
The president said: “Fly safely. You know why I say that? Because I’m on the flight. I want to get home, otherwise I wouldn’t care."
The incident was one of the very few bumps in the road during Mr Trump’s visit to Britain, which Prime Minister Sir Keir Starmer hailed as a “new era” for the special relationship between the UK and the US.
An unprecedented level of royal pomp took place during the Trumps' visit, including a state banquet complete with a special “transatlantic cocktail” as well as a vast military ceremony.
The Red Arrows fired jets of red, white and blue over Windsor Castle as part of the ceremony as Mr Trump’s favourite song, Y.M.C.A by the Village People was played by a marching band.
The Trumps were also shown a letter sent by Abraham Lincoln to Queen Victoria following the death of her husband Albert and laid a wreath at the tomb of the late Queen Elizabeth II, who had hosted Mr Trump during his first state visit.
Later on in the visit, as pomp turned to politics, Mr Trump and Sir Keir also signed a new tech deal which will see US firms invest in the UK and boost co-operation on AI, quantum and other emerging technologies.
Mr Trump praised the deal and described how the agreement would help America and Britain “dominate the future of artificial intelligence.”
The state visit has seen US firms commit to invest £150 billion in the UK alongside the tech prosperity agreement and co-operation on nuclear power schemes.
America’s top technology companies announced £31 billion of investment, including £22 billion from Microsoft to fund an expansion of Britain’s AI infrastructure and the construction of the country’s largest AI supercomputer.
Google committed £5 billion of investment, and Nvidia boss Jensen Huang hailed a “big week for AI in the UK” as the US chip giant agreed to deploy 120,000 advanced processors across the UK to help the British AI sector.
