One type of shop that sells butter pies had how many shops in the UK in the 1930s?
Butter pie:  The pie is stocked by fish and chip shops, sandwich shops, local corner shops and some supermarkets within Lancashire. Fish and chips:  Fish and chips first appeared in the 1860s; by 1910 there were more than 25,000 fish and chip shops across the UK, and by the 1930s there were over 35,000.
i don't know