The nation has fallen silent to mark Armistice Day, commemorating the end of World War One.
The national two-minute silence took place to mark the end of the war and to remember those who have died in conflicts.
A service at the Cenotaph memorial in Whitehall is being attended by government ministers, senior international military figures, schoolchildren and cadets.
At Westminster, Commons Speaker Sir Lindsay Hoyle and Lord Speaker Lord Forsyth are laying wreaths, while Massachusetts Senate President Karen Spilka will read a poem.
A ceremony is also being held at the National Memorial Arboretum in Staffordshire.
The Armistice, an agreement to end the fighting of World War One as a prelude to peace negotiations, began at 11:00 on 11 November 1918.
Commemorations have been taking across Europe on Wednesday. In Paris, French President Emmanuel Macron attended a ceremony during which a wreath was laid at the Tomb of the Unknown Soldier.
On Remembrance Sunday King Charles III led the nation in a solemn two-minute silence in London to honour veterans who had died in conflict.
He laid a wreath at the Cenotaph before a march-past by 10,000 armed forces veterans.
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