Launched yesterday, originally for one day only, BrewDog has announced an extension to its Bad Beer Amnesty across all UK bars until Sunday, after huge demand.

BrewDog bars have a designated ‘Bad Beer Bin’ where visitors can dump their unwanted cans of beer in exchange for a pint of the brewery’s latest lager.

The initiative to get drinkers to upgrade their lagers is available in all BrewDog’s UK bars, as well as its Berlin and Brussels bars in mainland Europe.

BrewDog is accepting cans in all participating bars. Each person who swaps a can of ‘bad beer’ will be entitled to one free pint of Lost Lager.

BrewDog co-founder, James Watt, said: “Lost Lager is a crisp, clean Pilsner with hints of spice and a zesty lime marmalade character. To mark its launch, we wanted to give beer drinkers a chance to taste a lager made with soul and passion, rather than the mass-produced fizzy yellow swill that the big breweries have been peddling for years.

“For decades, the craft of lager has been lost and forgotten, bastardised by mega breweries putting profit before flavour. But brewed right, lager can pack huge flavour and offer a really exciting style with depth and character.

“We have been working hard on nailing this recipe for months, and we know anyone who has a taste of Lost Lager will never look back.”