John Dale at Manchester is a good bet. Small school, decent aircraft and instructors that are there for all the right reasons. John is a recently retired satco with many hours teaching and flying at all levels, his other instructor is an atco at manchester. Both enjoy teaching & flying, the main motivator appears to be job satisfaction rather than making lots of money.
Multiflight at Leeds are also worth a look, especially for the IR, but the weather at Leeds seems to hamper CPL students. The cpl/ir side of the school is run by husband & wife team assisted by career instructors.
Neither of these schools takes any money up front, which is also a big consideration.