Supermarkets may be forced to sell land to allow rivals to open in areas where there is not enough competition.
The measure is likely to be among the Competition Commission's suggestions to remedy problems it has identified in the UK's grocery market.
According to market research group TNS Worldpanel, the UK's big four - Tesco, Asda, Sainsbury's and Morrisons - now account for more than three-quarters (76.2%) of the grocery market.
Source: BBC Online
