Human rights groups estimate some 450,000 children...are shut out of schools and working in the cotton fields of Uzbekistan every harvest. [Refers to Asda (part of Wal-Mart), Matalan, Topman (Topshop, part of Arcadia), Burton (part of Arcadia), Plexus Cotton, with responses from Asda, Matalan, Topman/Burton, Plexus Cotton. Also refers to Delta Group, Continental Clothing]