Only 1700 660ml bottles of the 9.2% brew are available and it's described as being "descended from the strongest Stout Porter brewed in Britain in the 18th Century and brewed with 10 different malts for uttermost complexity of flavour - big, dark and full in mouthfeel, expect roasted flavours with underlying notes of rich chocolate, cinder toffee and coffee."

Guitarist Fredrik Akesson and drummer Martin Axenrot visited the brewery and were taken on a tour by founder Russell Bisset. He says: "We're big metal fans at Northern Monk and Opeth is often the soundtrack to our brewing.

"When the opportunity to work with the band came up, we jumped at the chance. Opeth have been taking the same progressive and quality driven approach to music that we have to beer for the past 25 years and it was great to work with them.

"Our aim was to make one of the most bold and forward thinking brewery and band collaborations ever. We got together at the brewery tap room and tasted our range of beers with them and together came up with a couple of recipes." Read more - here.

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