Warren Tea Ltd, established in May, 1977, which has 13 tea gardens in Upper Assam, is an associate of James Warren. In 1993, the Manchester-based G S Ruia Group bought James Warren from McLeod Russel, gaining control of Warren Tea. The company suffered a minor setback in its working in 1987-88. Its yield per hectare is 2255 kg. Warren Tea, along with its associate companies, has purchased a 24% equity stake in Vegepro Foods & Feeds, which was held by Glaxo.