Louis had been careful to watch all events as they unfolded. He was sitting close enough to get a really good look at the young man, who it seemed was his Uncle Fred. Now usually he would never, ever, play his Head-Boy card to get what he wanted... well not often anyway. But as his Aunts, Uncle and James (it would be him wouldn't it?) left the room, he followed and the teachers after he'd said his little piece about being Head-Boy and 'that's my Uncle!!' let him go.
Unfortunately for Louis his Aunt Hermione had secured the door, so he was forced to knock. 'It's Louis, let me in please?' If they said no, he'd blow the bloody thing off its hinges, but he liked to give them a chance first. They couldn't shut him out anyway, he was family/