My brother was in the Police for 30 years, says it's the only Police drama he ever watches: apparently the only error is there is no centralised anti-corruption unit. If an accusation against say Suffolk Police were made, Somerset Police (for example) would investigate. But everything else has authenticity about it.Line of duty is a million miles ahead of another police or any other series. You can't lift your eyes from the tv as you may miss some vital info..