Fancy a deep red? The rise of underwater wineries

After bottles were recovered in top shape from a world war one wreck, winemakers have started to exploit the sea's cool, dark environment

Slipping into the chilly waters of the Baltic sea, the divers descended more than 60 metres to where the masts of the Jonkoping lay strewn across the seabed. They glided past the wounds left when the Swedish schooner was sunk by a German U-boat in 1916 to home in on the rare treasure they had come for: thousands of bottles of 1907 Heidsieck champagne.

Related: Champagne found at sea turns out to be world's oldest vintage