Imagine the world upside down. Imagine tomorrow, 8am. You’re getting your son or daughter ready for school. All of a sudden you notice that your child is not carrying a backpack but a lead pickaxe and shovel. Not a play one for the beach: a real, heavy one that will blister up their fingers.

And when you’re about to help them cross the road you see the track-lines on their hands from hours of working in the sun. You can’t believe it when you hear ‘I’m going to work’ come out of your child’s mouth, with that authoritative tone 10-year-olds have.