The US ambassador to the UK, Warren Stephens, laid a wreath at London's 9/11 Memorial Garden in Grosvenor Square alongside his wife, Harriet, to mark the 25th anniversary of the September 11 terror attacks. Ceremonies were held across the UK and US on Friday, with figures including the Prime Minister and Sir Tony Blair paying tribute, underscoring the enduring bond between the two nations forged in the aftermath of the atrocity.

The 2001 attacks killed 2,977 people, including 67 Britons, after hijackers flew passenger jets into New York's World Trade Centre and the Pentagon, while a fourth plane crashed in rural Pennsylvania after passengers intervened. Stephens said Britain's outpouring of support after the attacks, including more than 1,000 tributes still held in the US embassy's archives, would never be forgotten, while Andy Burnham warned that terrorism "still knocks at the door of democracy." The Duke and Duchess of Gloucester were also due to take the Royal Salute at Buckingham Palace later on Friday, accompanied by Stephens.