Supermarket shoppers have been warned as the cost of butter soared across the country in the last month. Butter has risen in price by as much as 21 per cent in supermarkets over the last month. Branded butter has seen the highest average price increase, with Trewithen Salted Block Butter 250g rising in price by 20.

8 per cent in Tesco, from £2.40 to £2.90.

The analysis, from The Grocer magazine, found that 37 out of 117 butters at the major UK supermarkets had risen in price in the five weeks up to November 13. At Waitrose, all Things Butter Garlic & Herb Butter 125g is up 20 per cent, while Country Life British Salted 250g and Unsalted Butter 250g at Sainsbury’s are up 13 per cent. Some own brand butter products have also rise, with Asda’s block butter up 6 per cent to £1.

92, while a 250g own brand block of butter at Sainsbury’s, Tesco, Morrisons, Aldi and Lidl has also risen by 6 per cent to £1.89. It is understood the price increase is a result of tight supplies of milk and cream due to adverse weather conditions.

The news comes a month after shoppers were warned that while food inflation had been coming down in recent months, it was still in a “vulnerable” position. In October Food inflation eased to 1.9%, down from September’s 2.

3%, particularly for meat, fish and tea as well as chocolate and sweets amid Halloween deals. British Retail Consortium chief executive Helen Dickinson said: “Households will welcome the continued easing of price inflation, but t.