Tesco, ASDA and Morrisons lost market share as high-end rival Waitrose and discounters ALDI and Lidl grew to account for a combined 11.5% of the total UK grocery market, according to Kantar Worldpanel. "This trend has cut deeply into the available market share for the bigger retailers who are now having to compete for a contracting middle ground," said director Edward Garner.

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