‘Now take huntin'…’ ‘Oh, bull-fightin' — that's quite a different kettle of fish.…’ Italics bred italics. Dropped g's fell as thick as confetti.
(Jan Struther, Mrs Miniver, 1939; 4th chapter, “The Eve of the Shoot”)
The location is a shooting-party hosted by Lady Chervil. From that and other clues, the context is definitely upper-class British society. So the dropped g's are not a sign of a working-class accent. What do they mean?