My older brother, the Wise Child, now works as a teacher in a Jewish primary school and has this to say on the subject of security: ‘By eight or nine the kids are very aware of anti-Semitism. We do intruder drills once a term. We start at age four. When the alarm sounds the children know to move away from windows and external doors so they can’t be viewed from outside. Some schools make a game of it – they call it Sleeping Lions – but we just make them sit on the floor in silence; we don’t want them thinking it’s a game because it’s not.