Asda has announced plans to plant and grow gourmet truffles in a Yorkshire field.

The retailer is conducting a trial to see if the highly valuable and sought-after fungi can be grown successfully at a one-acre site near Cridling Stubbs, near Pontefract.

A world shortage means that truffles often sell for thousands of pounds a kilo.

Asda spokesman Alan Slator said: “Truffles are normally the food of millionaires. People eating in some restaurants can pay £50 just to have a few scrapings on the top of their food.

“We want to bring them to ordinary people,” he added.