It’s the condiment that divides a nation.
Salt ‘n’ sauce is part of the chip shop tradition in and around Edinburgh, but salt and vinegar still reigns supreme across the rest of Scotland.
Inspired by a question from reader Iain Simpson, we tried to find out why Scotland is split over what you should put on your chips – and see if it was possible to define the boundaries of chippy sauce country.
Video by Zara Weir
Research by Louise Wilson