Britain's third-largest supermarket chain Asda has revealed that it will double its number of supercentres in the UK this year in a bid to close the gap on sector giants, Tesco and Sainsbury's. By the end of this year, its US parent Wal-Mart explained that there will be 13 Asda Wal-Mart Supercentres operational. Those currently open in the UK sell traditional groceries as well as a large non-food offering, that includes bikes, jewellery, electronics and camping equipment.