Plot: Tomatoes are a store cupboard staple for many of us, but can we trust what we are eating? Reporting for Panorama, Runako Celina investigates what is in the tomato purees we buy to make pizzas, pasta sauces and much more besides. She follows the tomato trail from China to Italy and then on to the UK and asks if products made using forced Uyghur labour in the Chinese province of Xinjiang could be ending up on the shelves of some of the UK’s biggest supermarkets