One is a much-loved bakery chain specialising in sausage rolls, the other is a sandwich shop where Proscuitto on artisan bread is among the most popular choices.
But the menus at Greggs and Pret A Manger don't just cater to different lunchtime tastes, they may also reveal the dividing line between the North and South of England.
Researchers at Sheffield Hallam University used machine learning and AI to examine all 2,500 outlets run by the two companies to find which areas in the country have more Greggs and the places where Prets are more prevalent.
