“This is most irregular!” Her Majesty the Queen exclaimed when the TARDIS materialised beside the dining table where she was having breakfast.
“So sorry, Ma’am,” the Doctor said, helping himself to a warm croissant. “I tried to get an appointment, but you’d be amazed how difficult that is and I didn’t have time to wait around, or I have the time, but you don’t. It’s complicated. Anyway, you need to come with me to talk to your younger self and make sure she marries Philip, otherwise all this,” he gestured to their surroundings, “will cease to exist.”
“Very well, Doctor.”