Tesco has continued to gain market share over the last 12 weeks, according to the latest data from TNS Superpanel.

Tesco now has 29.1% of the market, while Sainsbury has also seen its share grow for the fifth period in a row. Asda continues to be strong and has maintained its Christmas share peak of 17.1%.

The Somerfield fascia has also been seeing strong sales in the 12 weeks to January 30, with a year-on-year growth of 11%, which raises its market share to 3.6% form 3.3% a year ago.

Edward Garner, communication director at TNS Superpanel, said: “If Baugur’s bid for Somerfield is successful it would enable it to bring the Somerfield and Iceland fascias together to mount an assault on the growing convenience/ top up shopping trip. This could bring some competitive pressure to bear on Tesco as it endeavours to attract a similar type of shopper into its Express stores.”

Garner also noted that as consumers increasingly turn to their nearest stores for convenience on a regular basis rather than one large weekly store visit, this could offer a potentially strong growth market for Somerfield.

TNS’s Superpanel data also showed that Kwik Save continues to be in decline as the company recorded a 23% year-on-year drop as a result of closures or conversions to Somerfield.