But poverty-stricken seamstresses making some of the clothes in the MAS Holdings factory in Sri Lanka earn just £4.30 a day. It would cost them more than a month’s wages to buy a pair of Beyonce’s £100 leggings. The workers, mostly young women from poor rural villages, can only afford to live in boarding houses and work more than 60 hours a week to make ends meet. Most are reluctant to speak out for fear of losing their jobs. Campaigners insist the women are being exploited and treated like slaves. " We have to share the shower block with the...