Stores will close if Asda and Sainsbury merge, union warns

"Stores will close" if Asda and Sainsbury's merge, a union has warned.Sky News exclusively revealed on Saturday that Asda's owner, Wal-Mart, was in advanced talks with Sainsbury's about a shock £10bn tie-up that would create ‎a more powerful rival to Tesco, the current UK market leader.Joe Clarke, national officer for Sainsbury's at the union Unite, told Sky News the potential deal was an "absolute shocker".