What we are seeing here is another clasic case of the CAA changing the rules to the new EASA rules (they have no choice) but failing to check how the EASA rules will affect other related unique CAA Rules.
This EASA rule does not have such an effect in other countries because unlike the UK, aircraft on a private C of A can be used for;
Flight Instruction; and
Hired for private use.
In other countries Flight Instruction is not Aerial Work so most of the training fleets are on private category C of As.
Thus the CAA have taken away one part of their own unique system but kept the bits that should go also so that there is no real change.
Regards,
DFC