The national officer of the UK and Ireland's largest trade union, Unite, has welcomed the Competition and Markets Authority's decision to block the merger between Sainsbury's and Asda.
Bev Clarkson said that both the merger, and the possibility of store closures and job losses resulting from it, had been "unsettling".
Clarkson added that the process caused "great uncertainty at a time when the supermarket has imposed changes to contracts that have left many workers out of pocket".