Got my CPL/IR via the old CAA "self-improver" route and travelled all over the UK in search of the best value for each part. Did my BCPL (a now defunct rating I believe) with Chris Caine at Halfpenny Green and without a doubt he was the best instuctor I ever had!
There is a real difference I found between those who are career instuctors like Chris and those who are building hours.
Hope this helps.