Malcolm,

I wonder if you're thinking of 'The Stewarts of Blair', a three part Radio 2 series on the Stewart Family, which was broadcast during the 1990s. Unfortunately, I have buggar all in the way of documentation, so I can't give you a more precise date. However, my database does tell me it was narrated by Sheena Wellington(?).

But note the question mark, which means I'm not even sure that it was Sheena. Bloody hell. Why didn't I keep better records when the better records were there for the keeping?