Speaking about the setting for the drama last year, Knight said: "At the time it seemed completely normal, but when you look back there was a period when in Coventry and then Birmingham that a certain sort of music appeared.
"Suddenly everyone seemed to come together regardless of differences like race.
"You'd go to a Birmingham football match, and go to the pub after the match, and someone would turn up with a record player and plug it in and everyone was united.
"I thought it would be interesting to tell a story set at that time. I tried not to tell a story of four people who form a band but four people in very very difficult circumstances which they can only escape from if they form bands."
