Sainsbury's is the second largest chain of supermarkets in the United Kingdom with a share of the UK supermarket sector of 17.7%. Founded in 1869 by John James Sainsbury with a shop in Drury Lane, London, the company became the largest grocery retailer in 1922, pioneered self-service retailing in the UK, and had its heyday during the 1980s. In 1995, Tesco overtook Sainsbury's to become the market leader, and ASDA became the second largest in 2003, demoting Sainsbury's into third place. In January 2014, Sainsbury's overtook Asda to become the second largest supermarket chain. The holding company, J Sainsbury plc, is split into three divisions, Sainsbury's Supermarkets Ltd, Sainsbury's Convenience Stores Ltd (Sainsbury's Local), and Sainsbury's Bank. The group's head office is in the Sainsbu