The cost of the average weekly grocery shop plunged by eight per cent year-on-year in May, according to research by mySupermarket’s Groceries Tracker.

A basket of 35 staple products across all major grocers cost a total of £86.69 in May, down from £93.87 12 months ago.

Prices fell one per cent, just over £1 on the month, down from £87.70 in April, as fierce competition between the giant grocers continues to impact the market.

Gilad Simhony, chief executive of mySupermarket said: “This is great news for shoppers, as the savings they are making on their supermarket shop can really add up over a year.

“With the weekly grocery shop falling a massive eight per cent in the last 12 months, shoppers are saving almost £400.”.

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