I came to live in Shepperton in 1960. I thought: the future isn't in the metropolitan areas of London. I want to go out to the new suburbs, near the film studios. This was the England I wanted to write about, because this was the new world that was emerging.
Some of the bravest and the best men of all the world, certainly in law enforcement, have made their contributions while they were undercover.
In writing a series of stories about the same characters, plan the whole series in advance in some detail, to avoid contradictions and inconsistencies.