A beacon lights up the sky at Barrington Court in Somerset - one of more than 1,000 lit across the UK
PA
David Danks, of the City of Leeds pipe band, plays as a flame burns at Conisbrough Castle in South Yorkshire
PA
St Mary's Lighthouse, Whitley Bay, glows red in honour of the centenary
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The Queen and senior royals attended Westminster Abbey on Sunday evening where flowers were laid on the grave of the Unknown Warrior
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Princes William and Harry and the duchesses of Sussex and Cambridge at the Westminster Abbey service
Reuters
St Albans Cathedral is bathed in red light
PA
The names of people who died in World War One are projected onto the Scottish Parliament in Edinburgh
EPA
Belgium's King Philippe and Queen Mathilde during the Last Post ceremony at the Menin Gate in Ypres
PA
In Whitehall in London veterans attend the remembrance service at the Cenotaph.
AFP
The Prince of Wales led the nation's tributes to all those who have lost their lives in conflict on the centenary of the Armistice.
Reuters
British Prime Minister Theresa May, along with other political leaders and former prime ministers, stand during the two-minute silence on Whitehall
PA
The Queen overlooks the ceremony from a balcony alongside the Duchess of Cornwall and the Duchess of Cambridge.
PA
A police officer bows his head during the remembrance service.
Reuters
Following the laying of the wreaths hundreds of veterans take part in the annual parade.
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Armistice Day falls each year on 11 November to mark the day in 1918 when the fighting in World War One was stopped.
PA
A guardsman during the remembrance service at the Cenotaph memorial.
AFP
Chelsea pensioners in their red uniforms.
Reuters
The women of The First Aid Nursing Yeomanry take part. The unit was founded in 1907.
Reuters
Princess Anne salutes military veterans as they march past on Horse Guards Parade.
BBC
Ten thousand people took part in the People's Procession which began at the Mall and ended at St James's Park.
SWNS
On 32 beaches around Great Britain the faces of those who served during World War One are being created in the sand. A picture of the British army's first black officer Walter Tull is seen on Ayr Beach. He enlisted in the Army in 1914, rose to become a 2nd Lieutenant and died in the Second Battle of the Somme at the age of 29.
PA
Piper Louise Marshall, wearing a special commemorative red tartan, plays Battle's O'er, the traditional Scottish lament played at the end of battle, at dawn alongside the Forth Bridge in Scotland
PA
Poppies fill the Centenary Field of Thanks at the National Memorial Arboretum, Alrewas, Staffordshire.
PA
Veterans take part in a remembrance parade and service in Fort William, Scotland.
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A member of the public queues to attend the memorial service in London.
Reuters
In the grounds of St Mary's Church in Isleworth wooden crosses are arranged to mark the centenary of the end of the Great War.
PA
The union flag is seen at half mast at the Enniskillen Cenotaph in County Fermanagh, Northern Ireland.
EPA
Elsewhere around the world commemorations are taking place to mark what was meant to be the war to end all wars. Here a man looks on during commemorations at the WA State War Memorial in King's Park, Perth, Australia,
Reuters
Red poppies are projected on to the sails of the Sydney Opera House in Australia.
EPA
French President Emmanuel Macron leads the commemoration at the Arc de Triomphe in Paris.
Reuters
Mr Macron was playing host to 70 world leaders, including US President Donald Trump and German Chancellor Angela Merkel.
Reuters
Russian President Vladimir Putin is also in attendance.
Reuters
The empty chairs with the names of the world leaders are seen before a commemoration ceremony for Armistice Day in France where much of the conflict took place.
Reuters
French President Emmanuel Macron, his wife Brigitte Macron and German Chancellor Angela Merkel walk ahead of guests as they leave the Elysee Palace.
EPA
A dove is released at the tomb of the unknown soldier at Congres Column, in Brussels, Belgium.
EPA
Veterans make their way from the cenotaph in Hong Kong having laid their wreaths.
Reuters
British Royal Marine commando veterans parade past he cenotaph in Floriana, Malta.
AFP
Members of military history clubs wear WW1 French military uniform during a ceremony at the Brotherly cemetery of WW1 heroes in Tsarskoye Selo outside Saint Petersburg.