Texas-based grocery store chain Whole Foods Market Inc., which has 413 stores in North America and nine in the UK has admitted overcharging its customers, again.

Last year Whole Foods agreed to pay $800,000 (£515,500) in penalties after overcharging in California stores. This year the problem was detected in its New York stores, where an investigation by the New York City Department of Consumer Affairs found mislabelled weights on packages of all 80 of the products they checked.

The UK stores, which specialise in healthy products for the well-off are in London (Camden, Clapham Junction, Fulhan, Kensington, Piccadilly Circus, Richmond and Stoke Newington), Cheltenham and Giftnock, Glasgow.