Well Ryan Carey I actually based on a bloke called Bob who is a builder/plumber that has come to work on my flat a number of times. He does so begrudgingly and with a kind of contempt both for his work and the people who are employing him.

When I read the part of Ryan Carey, who’s this guy who’s helping the Doctor to explore this temple and take scientific readings, he seemed to have the same unpleasant attitude towards his profession and the world around him. So he’s based on Bob R****** who is a builder in North London.