Tesco has pulled even further ahead of its rivals, achieving 6.1% sales growth for the 12 weeks to 4 November, according to TNS Worldpanel grocery market share figures.

The figures reverse the trend of recent months in which Asda has been growing faster than its rival. Asda still grew 4.9%, while Sainsbury's chalked up 5.5% and Morrisons 4.5% growth.

Asda chief executive Andy Bond pooh-poohed the figures. "I don't worry about the month-on-month data; I worry about long-term trends," he said. "Undoubtedly all retailers have seen a bit of a slowdown over the past couple of months, but longer term we're still treading ahead of the market and delivering good growth."

Overall, the grocery market grew by 4.8%, with all the discounters showing growth of above 8%. Lidl leads the way with 10.3% growth, taking its overall market share to 2.2%.

At the other end of the scale, upmarket retailer Waitrose grew market share by 6.5%, securing a record 4% slice of the entire grocery market.

Edward Garner, director of research, TNS, said Iceland had also put in a solid performance. "Iceland's recovery shows no sign of running out of steam, with 9% year-on-year growth, but, interestingly, this growth is being driven by chilled and ambient rather than frozen."

Losers include Somerfield, with a 3.6% fall, while independents' share dropped 0.3%. The Co-ops' share grew just 1%.

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