Senior representatives of the Government and the armed forces will attend an memorial service to mark Armistice at the National Memorial Arboretum in Alrewas, near Burton-on-Trent.
The last surviving First World War widow, Dorothy Ellis, is expected to attend the outdoor event at the Staffordshire memorial, which bears the names of more than 16,000 fallen service personnel.
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Tens of thousands are having do not resuscitate orders imposed without families' consent, according to the Royal College of Physicians.
The prime minister has said the debate over Britain's EU membership has affected his long-term friendship with the mayor of London.
Tonight a band of cloud and rain will spread into Scotland and Northern Ireland.