NPPL REV07 will use another description for the required training - probably 'conversion training' - in order to avoid confusion with 'Diffferences training'.
The draft ANO revision simplifying and clarifying NPPL requirements is about to be sent out for consultation; noblues, your pilot will find himself pleasantly surprised at the resulting revalidation requirements, if all goes as the NPPL Policy and Steering Committee has endorsed.
History:
UK PPL was forced into JAR-FCL form against industry's wishes.
Industry then requested a simpler alternative - the NPPL.
NPPL requirements were incorrectly formulated in the ANO.
NPPL P&SC have now agreed changes to rsolve the errors.
Simplified NPPL regulations should become law next year.
BUT,
Legacy UK PPLs still exist
Legacy Microlight and SLMG PPLs still exist
JAR-FCL PPLs exist
NPPLs exist
All the above have their own revalidation and renewal requirements.