On September 29, 1943, a Danish rabbi interrupted the morning service at Krystalgade synagogue in Copenhagen and said: “We have no time now to continue prayers. We have news that this coming Friday night, the night between the first and second of October, the Gestapo will come and arrest all Danish Jews. They have a list of addresses and they will come to the home of every Jew and take us all to two big ships waiting in Copenhagen harbour, and on to camps on the continent.”

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Marcus Melchior told everyone: “There are two things you should do. Number one, you should stay away from your homes on Friday night. What will happen after that we don’t know, but on Friday night, in any case, don’t be at home. Number two, pass this news on to as many friends, family, whomever you can, so that they also know to leave home by Friday.”

The days that followed marked one of the most remarkable stories of resistance in World War Two. Under Hitler’s orders, Denmark’s Jews were to be deported on 1 October, 1943 – but in the space of a few weeks, an underground network and the country’s non-Jewish population spirited almost 8,000 people to safety via small boats across the Øresund to neutral Sweden.