Susie was recalling her experience for the superb BBC One documentary, Children Saved from the Nazis: The Story of Sir Nicholas Winton. It is customary on such occasions to say that their suffering is unimaginable. I find it is all too easy to imagine. All you have to do is look at your own children and think that people want them dead. So, you over-ride every maternal instinct, which is telling you to keep them close, and hand them over to strangers who promise they will take them to safety in England. At the railway station, you strain every sinew not to show your children how you feel because you don’t want this, their last memory of you, to be one of sorrow or fear. As calmly as you can, you post your darlings into a future you will never know.