Britain's grocers saw sales of frozen burgers and ready meals plummet in the wake of the horse meat scandal that is still spreading across Europe.
Market researcher Kantar Worldpanel said in the four weeks ending 17 February frozen burger sales were down 43%.
Sales of frozen ready meals declined by 13%.
"The issue has so far only affected the performance of individual markets rather than where consumers are choosing to shop," said Kantar Worldpanel director Edward Garner.
The pan-European scandal has prompted widespread product withdrawals, consumer concern and government investigations into the continent's food processing systems.
Although horse meat poses little or no health risk, the discoveries have damaged the confidence of consumers in supermarkets and fast-food chains since it was first identified.