Sainsbury’s has emerged as the big four’s big winner over the past three months, according to data from Kantar Worldpanel.

Only the Holborn-based outfit grew market share among the UK's top four grocers, up from 15.7% to 15.9% in the 12 weeks to 3 October.

The performance comes after Sainsbury’s last week unveiled a rise in like-for-like sales of almost 3% for the previous three months.

Asda’s market share continued to decline, slipping from 17.2% to 17.1% over the period.

Tesco and Morrisons both hung on to their existing share, at 30.9% and 11.5% respectively.

“Morrisons’ growth rate has slowed this period as it contends with the strong annual growth it posted a year ago,” said Kantar’s Edward Garner.

“Similarly, Asda continues to see its share under pressure, with a drop of 0.1%. But this is better than in previous months and we are currently seeing the re-launch of Asda’s core own-label range through the ‘Chosen by You’ campaign.”

Sales across the grocery market as a whole were up 4.1% in the past three months. But data from Nielsen yesterday revealed that volumes were up just 0.4%, with a record proportion of sales coming from items on promotion.

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