As you're not resident here, hankir, the British theme might be a bit obscure (you should have a better idea of the one from other place) so it might help to know that the southern area is just a surname once the 4 unchecked letters are changed (the name at 1d is both).
For 33d it's an obscure word meaning to 'use hemp seeder' 6 letters, but only using the first 4 (giving an equally obscure word for a fistful of Scottish grass).
I guess your list also gives the replacement Northern English delicacy?
Hankir, if you Google the name in the bottom silver section and the original for the top silver section, the story should come up. But just in case... two words, begins M and ends S.