Islay distillery Bruichladdich has added a new whisky to its core portfolio.

The company has produced its first 18-year-old whisky, which has been aged in American oak before spending several months in casks previously filled with a sweet Austrian "straw wine".

It taps into the growing popularity of cask-finished whiskies and gives the whisky more complexity and finesse, according to CEO Mark Reynier.

"Aficionados hooked on whiskies aged in Sherry casks will be blown away," he said. "There are similar traits but more complexity, finesse and fruit."