Complex sentence: The series aired during a dark period for the real-life Flying Squad, which in the late 1970s had been publicly censured for being involved in bribery, police corruption and excessively close links with the criminal fraternity.
Split into simpler sentences: The series aired during a dark period for the real-life Flying Squad. In the late 1970s, the Flying Squad was publicly censured for being involved in bribery, police corruption and excessively close links with the criminal fraternity.