Market researcher Kantar said grocery prices have risen by 1.7 percent over just four weeks, adding more pressure on families struggling with costs such as soaring energy bills Fraser McKevitt, Kantar's head of retail and consumer insight, said: "The typical household spends ￡4,726 per year in the supermarkets, so any future price rises will quickly add up.

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       "Shoppers will look to manage their spend by carefully selecting the products and retailers that offer them the best value."

       The UK's Inflation, or measure of price changes, rose 3.2 percent in August, with warnings it could soar to four percent by Christmas.

       Retailers are continuing to struggle with a shortage of lorry drivers ahead of the festive season, with supermarket shelves being stripped empty of some goods.