Waitrose achieved growth of 9.7 per cent year-on-year, Kantar Worldpanel said, well above market growth of 4.2 per cent.
But Tesco, which is almost a year and a half into its £1bn recovery plan, is still showing a year-on-year market share loss. Its sales increased 1.9 per cent in the 12 weeks to 15 September, year-on-year.
The latest sales figures gave Tesco a grocery market share of 30.2 per cent. J Sainsbury was the only one of the big four grocers to increase market share over the past year.