The world's oldest champagne, bottled before Victoria became Queen, is still drinkable, with notes of "truffles and caramel", according to the experts.

An "addictive" bottle of 1825 Perrier-Jouet was opened at a ceremony attended by 12 of the world's top wine tasters.

Their verdict: the 184-year-old champagne tasted better than some of its younger counterparts.

There are now just two 1825 vintage bottles left - and Perrier-Jouet has no plans to open them soon.