From the brewery:

The Hercule is considered by many to be a classic – very malty, but dry, with a hint of sweetness in the finish, and perfectly hopped. It has a very distinctive and intoxicating spicy aroma of fresh spruce that suddenly, irresistibly, fills the room when the swing-top is released. This unique house character probably derives from the strains of yeast used by the brewery – and possibly from the fermentation in oak – because the beers are made entirely of malt and hops.