A fishy business

Sign over fish and chip shop in Bingley.

Amazed to discover R and I use different terms for the products sold.

R has fish butty - I have a sandwich
A thick slice of potato covered in batter and deep fried is a collop for R - a scallop for me.
Slices of meat, sandwiched between two slices of potato, covered in batter and deep
fried is a scallop for R - a fritter to me.
Both agree fish sandwiched between two slices of potato, covered in batter and deep fried is a cake.

Neither of us fancy a deep fried Mars Bar!