The Hogs Back Brewery has just released its 4,000th brew since it launched 17 years ago, during which time it has brewed 35m pints of ale.
The Surrey-based brewer, founded by Martin Zillwood-Hunt and Anthony Stanton-Precious, has released a limited supply of Utopia ale to selected real ales pubs for the coming weekend by way of celebration.
"I've only ever brewed it three times before on the anniversary of each 1,000th brew so we will have to take extra care to get it right," said head brewer Mo Zeiher.
"It's a super-luxury drop of ale where we, rather indulgently, add extra quantities of ingredients to achieve a really powerful flavour, the name says it all."
She added: "Not in our wildest dreams could we have hoped to achieve this milestone back when we started. We just wanted to brew ale in the traditional way, which at the time was a dying craft as the big breweries of the day were busy killing off real ale.
"The years of hard work have paid off and now the ales we brew enjoy an almost cult following both at home and recently abroad too."