Slow HorsesShortlisted for the CWA Ian Fleming Steel Dagger Award 'The finest new crime series this Millennium' Mail on Sunday Slow Horses is set in Slough House, a dumping ground for members of the intelligence service who've screwed up: left a service file on a train, say, blown a surveillance, or become drunkenly unreliable. They're the service's poor relations the slow horses and most bitter among them is River Cartwright, whose days are spent transcribing