Known from Newspaper reports at least since the 1920's, and anecdotally back to the 1860's.
The original source of this receipt isn't known. Can you help? raise an issue on GitHubBrummy Bacon Cakes (8 cakes)
Ingredients:
3oz streaky bacon, diced
3 oz grated hard cheese
8 oz plain flour
2 tsp baking powder
pinch of salt
¼ pint milk
2 oz butter
Lightly fry the bacon bits. Rub the flour into the butter and half of the cheese, the salt and baking powder, add the bacon. Add enough milk to make a soft dough. Form into 8 ½ thick patties, sprinkle with the remaining cheese and bake in a hot oven until risen and browned, about 15 minutes.
This wartime receipt uses mashed potato instead of flour...

Making the Most of Bacon
Ministry of Food, Facts No 8
(Tamworth Herald - Saturday 29 September 1945)