In this extract from Roald Dahl’s excellent ‘Matilda’, the young protagonist patiently explains to a friend that a teacher’s genius lies in hiding her nefarious and abusive activities in plain sight.

And if you reckon “the headmistress grabbed me by the hair and slung me over the playground fence,” would be a tough sell, try “Rolf Harris groped me when I asked him for an autograph.”

That’s how they got away with it. Right there.

H/T @mrjamesob