Seems to be a bit of confusion here between commercial instruction and PPL instruction does there not?
If a school can only charge an additional £10-£15 for PPL instruction over wet hire rate, then thats all thats left for the poor instructor(less a few quid for overheads). Commercial insruction however attracts an additional £70 over wet hire rate leaving just a bit more in the pot for instructors with some seriously expensive add -ons to their FI rating.
There seems to be a severe shortage of commercial instructors right now and students will pay what they have to pay to get through their CPL and FIC...having started, .. they have to finish!!
North by any chance girlsblouse???