Also, modern fish and chips don't even get wrapped in newspaper these days. The practise was abolished in the 80s due to health concerns from ink/lead getting in the food.
The practise was done in the old days due to paper shortages. Some places still do it for nostalgia, but they put a protective layer between the food and the newspaper.
A lot of British things were designed due to shortages. Fish and chips became popular in WW2 due to food rationing, which did not apply to potatoes and fish.