The world's "most expensive and exclusive" potatoes are to go on sale across the UK for the first time this week at a major supermarket.

The variety, La Bonnotte, which is normally only grown on a small island off France, can sell for up to £400 per kilogram, reported the Belfast Telegraph.

However, Tesco has sourced a new supply, grown on Jersey, and will be selling them for the equivalent of £2.65 per kilo.

La Bonnotte commands a high price because normally only about 20,000kg is grown each year and they are handpicked because they are too fragile to be cultivated by machine.