Richard Ronan has voiced considerable concern following the announcement Tesco is to open a new store in Castletown.
Speaking to 3FM, the MHK for the town said he feared the impact it could have on local traders.
He said Tesco was both a "big name and a big problem” and the benefits the company claims to be bringing to the area need to be carefully examined.
On Wednesday the supermarket giant said it will be opening a new express convenience store in the Callow’s Yard site in the centre of the town.
However, on Thursday, rival Shoprite released a statement saying it will be developing a new service in Ballasalla.
The chief executive of the Manx supermarket said the company was carefully assessing it’s southern service and plans to form a bigger presence in the south.
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