The move to commemorate the centenary of the start of the First World War may prove useful as a reminder to a large number of Britons who remain decidely sketchy about the conflict.
A survey suggests many people's knowledge of the war blurs easily with World War Two.
More responders apparently thought Germany invaded Poland - as was the case in 1939 - than Belgium in August 1914.
Nine percent of people thought Winston Churchill was prime minister at the start of the conflict - the same number than correctly knew it was Herbert Asquith.
Embarrassingly, 1% of the 1,955 adults quizzed by YouGov for thinktank British Future thought Margaret Thatcher was PM in 1918 and 3% believed Britain and Germany fought the war on the same side.
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The actress told ITV News that government proposals would result in the deaths of more vulnerable women.
It was an eventful cabinet. The big winner today however was the defence secretary - and May ultra-loyalist - Gavin Williamson.
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