The only commercial schools in the NW area are:
Ravenair at Liverpool airport - supposed to be a good set-up I've heard - flown at PPL level with them not commercially
JD Aviation @ manchester - small school run by an airtraffic controller at M/cr; couple of aircraft, 2-3 instructors - I've heard very good reputation, 1-2-1 instruction and flexible timing, also all CPL/IR on aircraft for same price as other schools on sim
Multiflight @ LBA - large set-up with good facilities
Leeds Flying School @ LBA - smaller set-up but good reputation
I've visited them all and all have their own plus & minuses - all similar price - depends on whether you want a larger school such as Multiflight or a smaller less well known one such as JD
Hope this helps
Craig