The brewers of Okells are known here as "the brewery". Its actually a company called Heron & Brearley. They operate more pubs than anyone else and to a certain degree have a monopoly. That however doesn't mean they're bad. The Queens, The Cat and The terminus are all "brewery" and have all been recommended in this thread already.

In Ramsey, try the Trafalgar (no food there btw) for cheapish beer. The Plough is a quirky little place and The Swan (brewery) also serves food.