Britain is set to become the truffle capital of the world within 30 years, scientists have said, as they are developing new genetic approaches to create varieties that grow twice as fast.

It comes as a shift in climate means truffle farmers in the Mediterranean are facing exceptionally dry weather, creating a chronic shortage of the flavoursome fungus.

Mediterranean black truffles are mostly found in northern Spain, southern France and northern Italy because they need warmer and drier conditions. Read more.

By Katie Morley & Charles Hymas