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 messed up: perhaps left a service file on a train, blown a surveillance, or become drunkenly unreliable. They are the service's poor relations the slow horses and the most bitter among them is River Cartwright, whose days are spent