From the brewery:

ESB is a beer style that is firmly rooted in British history; it is rich and deep, complex and warming. Grain Store offers an abundance of sweet dark caramel and dried stone fruit notes, yet enough bitterness to draw you back in. Made with Heritage floor malted barley, regeneratively grown YQ wheat, single farm UK hops and historical yeast varieties. We love these sorts of beers, they are reassuring - something solid in a world of shifting sands.