Forced labour claims dent image of London 2012

They were supposed to be the most ethical Games yet, but research in Asian factories supplying official clothing has led to allegations of sweatshop conditions

Official Olympic clothing sold by Next is claimed to have been produced in sweatshop conditions in Sri Lanka. The allegation comes days after the high street chain unveiled the formal outfits that Team GB will wear at the opening ceremony.

Workers at the company's factory in Sri Lanka allegedly receive poverty wages and are forced to work excessive overtime and to meet unrealistic, ever-increasing targets.

Research by the Playfair 2012 campaign also cited allegations of mistreatment of staff working for the sportswear manufacturer Adidas in the Philippines and China.

Adidas employees in the Philippines said that pay rates were so low that at least half the workforce were forced to go to loan sharks in order to survive. They also said they were told that overtime was compulsory. In one Philippines factory, poor ventilation caused respiratory problems among garment workers.