Two recommendations today, both of which may have been in this thread before and both of which are on 4 Extra.
The Blackburn Files, starring the wonderfully named Fine Time Fontayne as Steven J Blackburn, private detective. Script by Dave Sheasby, Martin Wyley and Ian McMillan, who know exactly which words to use and where to put them.
Second up is Fags, Mags and Bags, the every day story of a corner shop in Lenzie. Written by and starring Sanjeev Kohli and Donald McLeary, it's as funny as.