Between December 1938 and the eve of war, 10,000 children travelled to the UK in an operation known as the Kindertransport. For a lucky 200, their sanctuary was Gwrych Castle, near Abergele, north Wales, which was given to the government as a place of refuge. And for the first time in 60 years, some of those who lived at Gwrych have returned to their childhood haunt.