Low n Slow -- you will note I was refering to training when, unless the CAA have changed things lately, grp a nppl still requires licenced airfields - this makes circuit work v expensive.
Re BMAA instruction rates I agree that they are/seem high (depending on what numbers you use). They do pay their instructors well and on occasion the words closed shop spring to mind.
Re permit renewals - Yes the PFA can be cheaper than the BMAA (both have microlights by the way) The BMAA require specific persons to be used for the inspection AND flt test, Again the words closed shop spring to mind.
Still hey ho both are cheaper and usually quicker than a Cof A shop inspection.