the shopping price hike

High food costs have added £15 to a weekly supermarket shop for a family of four in the UK, new research suggests.

Comparison website MySupermarket says a basket of 24 staple items including tea bags, milk and eggs costs 15% more than it did 12 months ago. The findings are based on its price comparisons of certain everyday items at Tesco, Sainsbury's and Asda.

The increases mean that families spending an average of £100 a week on food will be spending £780 a year more at a time when customers are under increasing pressure from higher mortgage, petrol and energy costs.

Johnny Stern, managing director of MySupermarket said: "The conclusion is that supermarkets are passing on a sizeable amount of the increased costs."

The price of wheat, rice and maize have nearly doubled in the past year . Analysts have warned that the higher prices are threatening to drive an extra 100 million people worldwide into poverty.

White loaf at Sainsbury's and Tesco: 65p - up 20%
Butter: 94p - up 62%
English mild cheddar: £1.52 - up 26%
Garden peas at Tesco: £1.79 - up 63%
Basmati white rice: £1.45 - up 61%