Supermarket shares slide as customers move to discounters

More than half of us shopped at Aldi or Lidl in the last 12 weeks for the first time, according to Kantar Worldpanel data.

That's seen more premium supermarkets take a hit - Sainsbury's are down by over 2.8 per cent, Tesco by nearly 1.5 per cent, and Morrison has seen a fall of 1.4 per cent.

Both Aldi and Lidl have seen double-digit growth in the last year, with Aldi now holding four per cent of the total grocery market. Other value players are also strengthening. Farmfoods has seen its sales grow by 36.6 per cent on last year.

The big four - Tesco, Asda, Sainsbury's, and Morrisons - and the Co-operative have all lost market share over the last 12 weeks.