Sainsbury's up, Morrisons down in quarterly grocery sales

The market researcher found that, in the 12 weeks to 28 October, next-placed rival Morrisons' market share slipped from 12 per cent to 11.5 per cent.

Director Edward Garner said of Morrisons: "Recent announcements about the development of online and convenience, which are the two fastest growing grocery channels, will no doubt be given added urgency as these channels continue to deliver growth for competitors."

Discount retailer Aldi hit 3 per cent of market share for the first time.

Meanwhile Marks & Spencer announced positive half-yearly results to the end of last month, with food showing a 3.4 per cent rise in revenue over the period.