SARAH YOUNG and ELIZABETH PIPER BRITAIN will introduce new rules for companies to try to prevent goods linked to China's Xinjiang region entering the supply chain, foreign minister Dominic Raab said on Tuesday, toughening London's response to allegations of forced labour. Addressing parliament, Raab said there was harrowing evidence of forced labour among Muslim Uighurs in Xinjiang after the United Nations estimated at least 1 million of the minority among others were held in an internment camp. Beijing denies the charges. Raab said Britain wanted to make sure it was free from any products that had links with Xinjiang, where…