"Bit in the past, then. I'm from 1955," Elizabeth said. It was unnatural to think of someone from a decade behind her, someone who didn't see the end of the war and the rebirth of Britain afterward and then it struck her - he didn't know. For this man, King George VI was king and she was simply a princess. She hadn't even married yet.

"I don't know the protocol for this sort of thing. Am I supposed to tell you what happens between 1942 and 1955? Or am I meant to guard it close?"