The best and worst supermarket bran flakes (including a £4.50 dud)

With 25 years of experience as a Telegraph columnist, chef and food writer, Xanthe Clay provides guidance on everything from roasting a Christmas turkey to baking the perfect loaf of bread. See more As the Telegraph's thrift expert, Xanthe can regularly be found taste-tasting staple supermarket products to find the best value, as well as taking a deep-dive into topical issues such as ultra-processed foods, ethical farming and sustainability.