Despite prostrate Germany’s need for the return of its men, in Britain we didn’t release our prisoners of war until 1948. In Russia — for those who survived — freedom came even later, in the 1950s; an apparent lack of moral equivalence saw the subject conveniently ignored until recently. Likewise, in a country that thrives on retelling wartime tales of derring-do, Britain has been slow to examine the complex story behind its internment of ‘enemy aliens’, the vast majority of whom were Jewish refugees.