Britain fell silent in commemoration of the nation's war dead on Remembrance Sunday.
The Queen led the Remembrance Day service at the Cenotaph, joined by members of the Royal Family, the PM, leaders of the main political parties, Commonwealth dignitaries and crowds of people wishing to pay their respects to those killed in past and present conflicts.
More than 750 armed forces personnel were applauded by the gathered crowd as they marched to form a hollow square around the memorial.
The country observed a two-minute silence at 11am. When Big Ben struck on the hour, the King's Troop Royal Horse Artillery fired their First World War-era guns to mark the beginning and end of the reflection in the heart of Whitehall. The Last Post was then sounded.
The Queen lay the first wreath of poppies at the memorial for "The Glorious Dead", followed by prominent politicians and representatives from the Commonwealth. The Bishop of London, the Right Reverend Richard Chartres, then led the service.
While the Queen led the event in London, memorials were happening all over the country as people paid their respects.
Theresa May said this year's occasion should also be a time for honouring the bravery of British forces fighting Islamic State, assisting UN peacekeeping efforts in Africa or fighting piracy.
This year's commemoration is especially poignant as 2016 marks the centenary of the Battle of the Somme and the Battle of Jutland, both in the First World War, the 25th anniversary of the Gulf War and the 80th anniversary of the first flight of the Spitfire fighter plane which helped win the Battle of Britain early in the Second World War.
The British Army suffered almost 60,000 casualties on the first day of the Somme battle alone and more than a million men would be killed or wounded on both sides over the course of the 141-day offensive.
Alex Saridis, great-grandnephew of Jack Cornwell, who was posthumously awarded the Victoria Cross for his heroic actions on board HMS Chester at Jutland aged just 16, said it was "amazing" to be at the Cenotaph with so many people.
Cornwell was stationed at a gun in an exposed position and was seriously injured when the ship was hit by 17 shells in the space of three minutes. He continued to stand alone at his post with shrapnel in his chest until the end of fighting, dying days later in hospital shortly after his 16th birthday.