As the Campaign for Real Ale (Camra) calls on brewers to remove isinglass - dried fish bladders - from drinks, Gareth May explores the growing trend for vegan and vegetarian beers.

“Who wants to drink fish guts?!”

Jemma Kington of the Moor Beer Company doesn’t mince her words. But she’s not wrong. Who would? No one, I’d wager. Although that’s exactly what us beer drinkers have been doing for years; drinking dried fish bladders.

Admittedly, they’re not plonked in our pint like a bag of giblets, but we’re still consuming bits of fish with every gulp. Known in the trade as isinglass, dried fish bladders are a popular clarifying - or 'fining' - agent in the brewing process and late last year Guinness shocked the beer world by denouncing isinglass and declaring themselves vegan-friendly.