Barrel-aged and using a variety of yeasts; a study in patience Barrel ageing blending and using different yeasts this embraces our love of the unpredictability of wild yeast with the subtlety and complexity of maturation in oak barrels. A study in patience it takes at least 90 days for the wild yeast to work its magic. Modus Operandi is the perfect accompaniment to red meat and game dishes such as duck or venison a beer that could easily replace a red wine on the dinner table. A transformation of an old English ale into a beer that is Wildly different. A unique dark flavourful beer with a smooth rich full body and complex fruit flavours of berries sweet cherries and tannins.