We are raiding the Audio Long Reads archives and bringing you some classic pieces from years past, with new introductions from the authors. This week’s article: Britain’s biggest pharmacy used to be a family business, dedicated to serving society. Now, many of the company’s own staff believe that its relentless drive for profit is putting the public at risk. By Aditya Chakrabortty. Help support our independent journalism at theguardian.com/longreadpod