The Guardian's Audio Long Reads

As the Long Read turns 10 we are raiding the archives to bring you a favourite piece from each year since 2014, with new introductions from the authors. This week from 2017: The world-beating British sandwich industry is worth £8bn a year. It transformed the way we eat lunch, then did the same for breakfast – and now it’s coming for dinner. By Sam Knight. Help support our independent journalism at theguardian.com/longreadpod