Military veterans, religious leaders, politicians and volunteers took their places for the ceremony on Sunday morning. At 11:00 GMT, Big Ben struck the hour and a two-minute silence was observed followed by a gun salute.
CLICK ON PHOTOS FOR FULL GALLERY
Prince Philip, Prince Charles and Prince William also laid wreaths, as did Prince Andrew, Prince Edward and the Queen's cousin, the Duke of Kent.
Edward's wife the Countess of Wessex watched proceedings the balcony of the Foreign Office on Whitehall, joined by the Duchess of Cambridge and the Duchess of Cornwall.
The Duchess of Cambridge, the Duchess of Cornwall and the Countess of Wessex observed the service from a balcony
Political figures including Prime Minister David Cameron, Deputy Prime Minister Nick Clegg and Leader of the Opposition, Ed Miliband were also in attendance. Joining them were past leaders including Tony Blair and Sir John Major.