The Royal British Legion leads a two minute silence for Armistice Day at 11am on the 11th day of the 11th month in the square. Ben Shephard hosted the proceedings which included musical performances and readings from a variety of artists leading to the two minutes of silence at 11am. After the event, members of the public placed poppy petals in the fountains as a symbolic act of remembrance. Silence fell at 11:00 GMT to remember servicemen and women killed in battle.
England and Scotland footballers broke Fifa rules forbidding "political statements" when they wore poppy armbands at their World Cup qualifying match at Wembley later.
People gathered at war memorials and in schools, offices and other public places across the UK to pause for two minutes to commemorate the moment the guns fell silent for peace at the end of World War One, on 11 November 1918.
Hundreds of people attended the Royal British Legion's Silence in the Square event in Trafalgar Square, where poppies were laid in the fountains and music was performed by a range of artists including Russell Watson.