Westminster Abbey is to hold a special Armistice Day service following the deaths this year of the three remaining World War I veterans living in the UK.
The Queen will lead the country in observing a two-minute silence at 1100 GMT for the “passing of a generation”.
Bill Stone died at 108 in January followed by both Henry Allingham, 113, and Harry Patch, 111, in July.
The monarch will lay a wreath on the Tomb of the Unknown Warrior and Mr Stone’s daughter will give a reading.
Gordon Brown will also attend along with former prime ministers John Major and Margaret Thatcher, although Tony Blair will be in the Middle East in his capacity as a special envoy.
Actor Jeremy Irons will read Last Post by the Poet Laureate, Carol Ann Duffy, during the service to recognise military and civilian contributions to the conflict.
The silence, to be observed around the UK at the 11th hour of the 11th day of the 11th month, marks the moment four years of war ended with the signing of the Armistice Treaty by Germany and the Allies.