I recorded this onto VHS when it first aired. First off, the copyright notice in the end credits says 1989 not 1988.
This is very pleasant, though not the best production and the 80's synthesised music score sounds dated now.
But the plot and the humour should keep you going, and I doubt anyone will guess "whodunnit".
The village druids, misogynist ex copper turned crime novelist, mad actor and dotty posh MP's wife are all perhaps clichés but this is all very light hearted and not to be taken too seriously. Worth a look if you can find it, though I can see why it might not warrant a VHS or DVD release - especially nearly 25 years on.