BBC research has found at least 577 UK supermarkets were approved in the past two years, with campaigners concerned at the growth of the 'big four' stores.
Planning authorities gave Tesco, Sainsbury's, Asda and Morrisons permission for at least 480 stores in England in the two years to 1 November.
Campaigners say the stores are putting independent traders out of business...
BBC News - 'Big four' supermarkets get 577 stores agreed, BBC finds
