Last modified on Sun 2 May 2021 17.46 EDT Like Jed Mercurioâs previous hit, Bodyguard, the latest series of his police procedural Line of Duty has caught fire. The public has crushed to its bosom the latest tale of anti-corruption unit AC-12, led with crusading zeal by the dauntless trio Ted Hastings (Adrian Dunbar), Steve Arnott (Martin Compston) and Kate Fleming (Vicky McClure) in the fight against individual and institutionalised rottenness in the police force. Even before last nightâs finale it had already become the highest rated British TV drama in 13 years (beating Bodyguardâs 10.4m overnight viewers by another half million). At the risk of sounding like a mere embittered fan shouting at Johnny-come-latelies, however â¦