The major supplier of cork closures to the South African wine industry - Amorim Cork South Africa - has achieved accreditation by the Wine Industry Ethical Trade Association (WIETA)...WIETA - modelled on the UK retail sector's Ethical Trade Initiative - was established in 2002 to improve the working conditions of employees in the South African wine industry. [also refers to Tesco, Waitrose (part of John Lewis Partnership), Sainsbury, Marks & Spencer, Somerfield]