Over the last few weeks, the British beer world has taken a hit that many drinkers never saw coming. Keystone Brewing Group, the company that owns or manages Black Sheep Brewery, Purity Brewing Company, Magic Rock, North Brewing Co, Fourpure, Brick Brewery, Brew By Numbers, Big Drop, Hofmeister, Maison SASSY and Wolf Pack, has filed a Notice of Intention to appoint administrators. In my latest Behind The Brewer investigation, I break down exactly what is going on.