It's a bit difficult to name any regional dishes where I live. It's one of those places that used to be in Essex but is now in London, although we have tried to escape on several occasions.
Traditionally we used to have
eels, pickled herrings, and tripe
cockles, mussels, winkles (from the Leigh cockle sheds)
oysters (Burnham and Colchester)
rabbit (my family used to go rabbiting regularly over Hainault forest until myxomatosis wiped most of them out in the early 1950s)
pheasant (usually road-kill)
suet pudding (either with gravy for dinner, or syrup for dessert)
yorkshire pudding (with dinner, or with evaporated milk and syrup for dessert)
spotted dick with custard
brawn
fish and chips
Apparently blackbird pie was also quite common, squirrel less so, but I'd have neither.
When I was young local beef and lamb were the most usual meats, followed by pork. Chicken was always a treat because it was expensive, in spite of the fact that we used to keep them (mainly for eggs, but some were slaughtered at Christmas). Turkey was unheard of.
I used to have lots of fresh fruit - we grew apples, cherries, plums, black-, white- and redcurrants, gooseberries, and rhubarb - and vegetables, because we grew our own. There wasn't even a butcher's, grocer's or greengrocer's where I lived until 1958. The only shop was a sweetshop in the local haulage yard!
Local produce was beef and lamb, later chickens too, but these particular farms have all disappeared, although there are still a few farms not too far away. All the usual veg, fruit, and grains are grown, and quinoa (which always surprises people), but local dishes have changed a lot, mainly because the local population has changed - mainly south Asian, west African, and eastern European now round where I live.