St Austell’s most recent collaboration ale – created alongside Moscow’s New Riga Brewery – is now available in bottle.

Black Square Russian Imperial Stout, which the brewer said was well received when it was introduced at this year’s Great British Beer Festival, has now been re-brewed on the St Austell Brewery Small Batch and is now ready for beer fans across the UK.

Russian Imperial stout is a strong dark beer made in the style of beers brewed in the 18th century by Thrale’s brewery is London for export to the court of Catherine II of Russia. Black Square has already been released into the Russian market in keg and it instantly became New Riga’s best-selling craft ale and remains its best-seller to date.

Roger Ryman, St Austell’s brewing director, said: “We have been working with New Riga for a number of years now as a distribution partner and when they opened their new brewery, it made perfect sense to go and work with them to create a brew that meant something to both of us and that we knew would work in both markets. It is a fantastic brew and the collaboration simply adds to its authenticity. During out visit we were able to create some fantastic bonds of friendship, not only amongst the New Riga’s brewing team, but also amongst beer drinkers in Moscow who we know will tell all of their friends about us and share the story on social media. Such a positive story and such good will is invaluable and impossible to emulate unless it is genuine.”

Oleg Leandrov, New Riga’s general manager, said: “To be able to work with an award-winning brewer like Roger Ryman was a real treat for our brewing team. Our brewery is a relatively new addition to our business, so to be able to brew something in collaboration with St Austell was very special and the success of Black Square in the Russian craft beer market shows how well the two teams worked together.”