Seventy years ago this month, an extraordinary mass escape happened from Nazi-occupied Denmark. Tipped off about German plans to deport them to concentration camps, almost the entire Jewish population - several thousand people - fled their homes and left the country.

As he stepped onto the fishing boat that was meant to carry them across the Baltic sea to safety, 14-year-old Bent Melchior feared he might never see his home again.

A week earlier, he had left the home in Copenhagen he shared with his parents and four siblings. It was 8 October 1943 and Denmark was under Nazi occupation. Along with thousands of other Danish Jews, Bent and his family were fleeing the Germans....