What changed after Churchill and Bevan's speeches?

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They are some of the most famous speeches on matters of war and peace, but did they actually change anything? David Cowling, who was head of political research at the BBC and Deborah Mattinson, who was Gordon Brown's pollster talk to Paddy O'Connell about the impact of Churchill's post Dunkirk speech of 1940, and Nye Bevan's 1956 speech warning against action in Suez.