Based solely on that passage you quoted, I think I would like The Brandons, though I'm not too well-acquainted with the version of 1930s Britain where people aren't being murdered constantly at house parties.

Except for James Herriot! No one ever gets murdered in the Low-Key Country Vet Adventures! Well, they might; I don't know for sure. I can 1000% recommend the TV show as the coziest thing ever created. I've never read the books, but they're probably similar.

Trap yourself in a car with Dorothy Sayers! This is a good idea (or maybe not).