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Dunnes' market share hits 24.3pc

Dunnes Stores has soared ahead in its share of the grocery market here – rising by 4.6pc to 24.3pc.

The company focused on heavy promotional activity over the Christmas period, which gave it the edge over rivals.

Tesco, SuperValu and Superquinn all lost ground in the same period. The decline posted by Tesco is the first time that the retailer has fallen behind the market growth rate since October 2009.

In the latest period, the market growth rate was 0.6pc. Kantar said Tesco could grow its share again by capitalising on shoppers who've been making more frequent trips to its stores.

Worldpanel commercial director David Berry said Dunnes' sales growth highlights the success of the Shop And Save campaign.

"Shoppers have responded well to this offer, picking up more items every time they shop," he said.

Discount German retailer Aldi enjoyed the strongest level of growth, up 30pc in the 12 weeks to January 22 and now claims 5.9pc of the market.