Iain Glen agreed, adding: “I think the problem with the Holocaust, generally, is it has an incomprehensibility about it for those who had no direct contact with the future generations.

“Either it’s documentary footage, of which there is a lot, but how do you find a way of telling it?”

He added: “We’re never going to understand – and that’s what’s so moving about hearing them (the survivors) afterwards.

“They are! They’re alive and they did such a huge variety of different occupations and went on to do such extraordinary things; they’re incredibly grateful to the United Kingdom for providing a safe haven for them and so yes, that underlying knowledge, for me, made it really moving watching it with them present.”

The Windermere Children, which also stars Romola Garai and Thomas Kretschmann, airs at 9pm on BBC Two on January 27, which is Holocaust Memorial Day.

Source: The Evening Express