Image source, MOD

tweets:, external At the going down of the sun and in the morning, we will remember them.

Big Ben, the Great Bell of the clock at the north end of the Palace of Westminster in London, chimes as the silence begins.

Thousands have gathered at the Tower of London to observe a two-minute silence that will begin at 11:00 across the UK.

Linda: Why are we all in work? It should be a National Holiday to make sure that this day will always be remembered.

The scene at the Tower of London where dignitaries are gathering for the two-minute silence.

Tina Coppin from Norfolk made her own version of the Tower poppies.

This year is also the 70th anniversary of the D-Day landings, which marked the beginning of the Allies forces' invasion of Nazi-occupied western Europe. As many as 4,000 Allied troops and 9,000 German died in one day. Commemorations for the event were held in June.

French President Francois Hollande laid a wreath at the Tomb of the Unknown Soldier, beneath the Arc de Triomphe in Paris, and inaugurated a new memorial paying respect to the dead of World War One.

In 1918, on the 11th hour of the 11th day of the 11th month, an armistice was declared that finally ended a war that had claimed the lives of over 800,000 soldiers from the UK and Commonwealth. The BBC's timeline offers an insight into the history of how we remember this day.

Image source, EPA

The ceramic poppy field surrounding the Tower of London has captured the public's imagination, drawing almost 4 million people to pay their respects. There are over 800,000 poppies, one for each fallen soldier from the UK and Commonwealth.

Image source, Tom Williams

Tom Williams took this photo at the Tower of London. The poppies are reflected in the murky water.

Image source, EPA

The Royal Family stood alongside politicians, soldiers and veterans to mark Remembrance Sunday. The BBC's picture gallery covered commemorations from around the world.

Lord Dannatt, former Chief of the General Staff, tells the BBC News Channel: "On Armistice Day one thinks about the people one served with and one lost. I think it's right we do reflect on the meaning of service and sacrifice."

A memorial service has taken place in the Afghan capital of Kabul. Yesterday, Prince Harry made a surprise visit to Kandahar, Afghanistan, leading tributes to more than 450 UK soldiers who have died there since 2001.

BBC News website reader: My friend and I are going to ride our horses to the local war memorial and observe the silence on horseback in memory of not just the human cost of war but the animals who lost their lives too.

Belgian dignitaries laid wreaths at the Menin Gate.

Susan London: I will keep a 2 minutes silence. For me it's respect, for those that paid, the ultimate price, so we could enjoy, our freedom.

A period of silence has already been observed outside Menin Gate in Ypres, Belgium, where the names of around 55,000 UK and Commonwealth soldiers with no known graves are engraved.

Brian Laine: As a wearer of a white poppy I will spend the 2 minutes reflecting on the damage war does to all, the needless violence, and the futility of war in many cases and where the poor play out the politicians' games. We should be striving for a more peaceful world and to resolve conflict without violence.

Welcome to the BBC's coverage of Armistice Day. Here you will find live updates on key events and commemorations in the UK and across Europe.