It's quite comprehensive, and mentions many of the sorts of crimes that feature in Foyle's War episodes. I thought the author had got hold of Horowitz's research files, actually!
I imagine the only reason the author doesn't mention FW, an ITV program, is because he's writing for the BBC, and the two broadcasters are rivals.

http://www.bbc.com/news/uk-england-33566789
Lesley