Some of the UK's biggest supermarkets are limiting sales of tomatoes and other salad items.

Three big retailers are placing limits on shoppers on some produce lines. What is behind the rationing?

Leaving the EU single market and customs union will bring new friction and red tape for food importers

UK reliance on EU food imports is a major risk if the country crashes out of the union. / Walk into any British supermarket and you will be surrounded by European products, from Italian cheeses to French wines. Around 30% of all food consumed in the UK is imported from the EU, but for some foods, such as spinach and olives, the EU is practically the UK’s sole supplier.