"Sainsbury's has dropped the Prince of Wales and the head of the Soil Association as vegetable suppliers because it says their produce did not meet the right standards, the Guardian can reveal.
The move has prompted the director of the organic food and farming charity, Patrick Holden, to accuse leading supermarkets of being so centralised and industrialised that they cannot deliver the local, organic food their customers want.
Mr Holden said he had decided to speak out because his case was typical. "Everyone who has supplied a supermarket own label will have a story similar to mine to tell but most daren't tell it for fear of being delisted. This is not confined to one supermarket. It is the unintentional consequence of the centralised supermarket distribution system."