Thousands of people have gathered at the Cenotaph in London to mark Remembrance Sunday. The Queen led them in remembering those killed in wars past and present.
The Queen was joined by the Duke of Edinburgh and Princes William and Harry. They stood by the Cenotaph as the crowds fell silent for two minutes.
Prince Harry laid a wreath on behalf of his father Prince Charles who is in Canada. The 25-year-old served on the front line in Afghanistan for 10 weeks.
Gordon Brown led a host of politicians, including former prime minister John Major, in paying their respects. Earlier, Mr Brown said the courage of British soldiers fighting in Afghanistan was second-to-none.
The heads of the three services - Army, Navy and Air Force - stepped forward side-by-side. General Sir David Richards, Admiral Sir Mark Stanhope and Air Chief Marshal Stephen Dalton laid wreaths together.
Former servicemen and women from a series of conflicts and a host of nations joined in the service and sang O God, Our Help in Ages Past.
Around the UK, other services were held, including at the National Memorial Aboretum in Staffordshire. There, eight-year-old William Wright wore his great-grandfather's medals with pride.
Archibishop of Canterbury Dr Rowan Williams led the Remembrance service at Catterick Garrison in North Yorkshire. Afterwards, he met the families of some of the thousands of troops based there.
Scotland's First Minister Alex Salmond laid a wreath at the Stone of Remembrance at Edinburgh Castle. Other events were held in cities including Glasgow and Aberdeen.
Belfast held its own service too at the City Hall. It was led by Lord Mayor Naomi Long, while First Minister Peter Robinson represented Northern Ireland at the Cenotaph in London.
Earlier, Remembrance Sunday services in Afghanistan took on an extra significance after a bloody week for British troops. Flags flew at half mast at the main base in Lashkar Gah, Helmand.
The commander of Task Force Helmand Brigadier James Cowan laid a wreath during the ceremony. Afterwards, he said the war was "winnable" and that the right strategy was in place to win it.
About 500 men and women attended the service and took part in a minute's silence. A makeshift altar stood in for the Cenotaph - the focus of remembrance back in the UK.
On the day of the service, the Ministry of Defence announced the deaths of another two British soldiers in Afghanistan.
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