Probably something my mum might have watched by chance. Back then, we lived in Southport where we could also get HTV Wales as well as Granada.
"What was I thinking of, hitting him? Nothing. No, I know. I hate him! I hate his guts, I hate everything he stands for with his PACE and his plus and his statements of purpose and his smiling at the punters and his have a nice day! I mean when was the last time he ever nicked anybody, eh? A real villain! When was the last time he ever put himself on the line?"
I remember it being described as like a John Le Carre story for young people (no coincidence that Benedict Taylor appeared in A Perfect Spy as well?). I'm certainly intrigued by it although the picture quality on Youtube looks a bit duff.