The rare Pepquino melon measures just an over inch (3cm) from tip-to-tip but has the identical external pattern and distinctive shape of traditional watermelons.

The Pepquino melon, less than a centimetre in diameter, most closely resembles the All sweet variety of watermelon.

It was discovered by Dutch food producers in South America who brought it to the Netherlands and cultivated it in greenhouses.

While it resembles its larger cousins, it has a fresh crisp taste similar to a cucumber.

With its distinctive appearance and slightly sour taste producer Koppert Cress believes it is set to become a new food fad in top London restaurants.

Prices start at £10 per 250g box, which contains around 50 melons.

Anneke Cuppen, marketing manager at Koppert Cress said: "Demand for the melons has so far come from the restaurant and hotel trade. We're hoping to sell 50-100 boxes a week.

"We're very excited about the product. It is highly versatile and can be used in a variety of ways - from salads to dessert."