I happened to watch an episode of Light Lunch on Youtube the other week and thought they were quite funny
They were really likeable in their early days, Sue's Emma Thompson impression etc, but they tend towards too arch and self-knowing now, like plenty of others who stretch out their careers with a series of unnecessary vehicles instead of retiring from TV and doing a proper job stop me if I sound bitter. I'm kidding, I just went off them on Bake Off.
I once saw a 1980s documentary (can't find it online now) where Tim Brooke-Taylor (Me & My Girl actor) revisits Cambridge to chat to players in the current Footlights, including a young Mel, Sue and Henry Naylor. I remember Mel seeming uncharacteristically shy and self-conscious being on camera.