Thank mrs twm, actually. I knew about the programme but didn't realise that MK was on it. It was mrs twm who heard a "trail" for it on BBC Radio 2 and MK was mentioned in the trail.
As to your question, no idea, I'm afraid. I am not familiar with the programme. BBC Radio Devon, one of the BBC's local radio stations, is outside my area and, anyway, I shall be elsewhere at that time on Saturday. I suspect that it will just be something from TRACKER.