The son of the man often described as "Britain's Schindler" has spoken of his pride at what his late father achieved. On the 80th anniversary of the liberation of the Auschwitz-Birkenau death camp, we spoke to the son of Sir Nicholas Winton, who with his small team is credited with saving the lives of 669 mostly Jewish children on the eve of World War II in what was then Czechoslovakia. His heroism went largely unrecognised for years until a 1980s British television programme, "That's Life", managed to find an entire audience of people whose lives had been saved thanks to Winton, who himself was surprised to discover that every other person there owed their lives to him. His incredible story was recently told in the film "One Life". His son Nick Winton spoke to us in Perspective.