Politicians and their staff have been warned by MI5 that they are being targeted by spies from countries like China , Russia and Iran to undermine British democracy. The intelligence service put out guidance to MPs and peers on how to counter “espionage and foreign interference" in a warning following a row over the collapse of a major spying case. The document said: "The UK is a target of long-term strategic foreign interference and espionage from elements of the Russian, Chinese and Iranian