A judge found that they were not guilty on all charges, despite a report by the Independent Police Complaints Commission accusing them of being “unwittingly racist” and “the most serious neglect of duty”.

To this day, Alder’s family are still hoping to get justice. And, responding to the Line Of Duty plot in an interview with Hull Live, his sister, Janet, said: ““I am so happy people have not forgotten what happened to my brother. I didn’t see the programme, but I have seen a clip since. It was very clever the way it got the point across.”

The death of Stephen Lawrence inspired Line Of Duty’s Christopher Lawrence case

Stephen Lawrence, a budding 18-year-old architect, was killed after being stabbed multiple times as he waited for a bus in 1993. It took almost four years for an inquest to rule that the racist attack had been conducted by five white youths, and, in July 1997, a 350-page report into the cast, titled the Macpherson Report, found the probe into his death faced “institutional racism and a failure of leadership”.

Line Of Duty season 6: the true stories that inspired the BBC crime drama