He's about to ask who Donald Trump is - wasn't he that Muggle cartoon duck? - but doesn't.

"You haven't been on the booze?" He sniggers. "I take it your game did involve some, though?"

"That's right. This wand here -" he waves it about and a few green sparks scatter tantalisingly "- is a hell of a thing. One flick of my wrist and your entire bedroom would be yellow as a buttercup."