Divers discovered what is thought to be the world's oldest drinkable champagne in a 200-year-old shipwreck under the Baltic Sea.

Dive instructor Christian Ekstrom said the champagne, believed to be from the 1780s, "tasted fantastic".

Mr Ekstrom said he is "98% sure" of the champagne's age, having conferred with experts.

About 30 bottles are believed to remain in the wreckage.

Swedish wine expert Carl-Jan Granqvist said each bottle could fetch 50,000 euro if the corks are intact and the champagne still drinkable.

The bottles were discovered on Tuesday near the Aland islands, in the Baltic Sea between Finland and Sweden.