Harry sighs. ‘There’s a rule, Iain. A squire can run into the mêlée. If he unseats a knight, he can keep their horse. But nobody actually does it. You have to go in unarmed and without a shield, at most in a mail shirt and a helmet.’ ‘Oh,’ Iain says, a grin playing at the edges of his lips. ‘Iain, no,’ Harry says.

