As I write my February blog, Sir Anthony Beevor, historian and bestselling author of epics such as “Berlin” and “Stalingrad”, is talking on Radio 4’s Desert Island Discs. I am humbled by his ongoing questioning of the facts in spite of his already huge achievements in bringing World War 2 to life in extraordinary detail. And I’m grateful for his admission of how hard it is to research this horrendous episode of history. His voice wobbles as he talks of reading the gruesome accounts of the rapes, murders and infinite human suffering. “We write to understand,” he says, emphasising the necessity for us to “learn the lessons of history”.