In December 1938, Nicholas Winton, a 29-year-old London stockbroker, was about to leave for a skiing holiday in Switzerland, when he received a phone call from his friend Martin Blake asking him to cancel his holiday and immediately come to Prague: “I have a most interesting assignment and I need your help. Don’t bother bringing your skis.” When Winton arrived, he was asked to help in the camps, in which thousands of refugees were living in appalling conditions.

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