German discounters Aldi and Lidl have enjoyed three months of booming growth as more than half of British households visited at least one of the stores, according to latest industry data.
Tesco, Britain's biggest supermarket, saw sales slide 1% as its market share fell by 0.6% to 28.2%, while Asda retained second position despite market share falling to 16.7%, with sales down by 2.9% compared with a year ago, figures from Kantar Worldpanel show.
However, the figures do not include Northern Ireland.
Sales at Morrisons decreased by 1.4%, taking share to 10.7%.
Lidl picked up by 16% to reach a new market share high of 4.2%, and Aldi saw sales rise 17.3% to take a 5.6% share of the market. The discount retailers continue to strengthen their position in the market with 56% of British households visiting either an Aldi or a Lidl in the past 12 weeks. But the grocery price war continued to stall market growth, leaving it static at 0.9%.