I love the old BBC Light Programme 'Paul Temple's serials, as they are some of the most glorious escapism that exists, but even I must admit that the plots are nonsensical to the point of utter incomprehensibility. Still, the vicarious whiskies-and-soda more than make up for it.
Here's one from the Internet Archive
archive.org/details/PAULTEMPLEANDTHEVANDYKEAFFAIR
And the current BBC on demand one:
www.bbc.co.uk/programmes/b03pc96p