Such enquiries should be handles as stated in LASORS:
The National Private Pilots Licence (NPPL) has been
available since 30th July 2002, and comes under the
auspices of the National Pilots Licensing Group Limited
(NPLG). NPLG Ltd receives technical support from
Popular Flying Association (PFA), Aircraft Owners and
Pilots Association (AOPA), British Gliding Association
(BGA) and British Microlight Aircraft Association
(BMAA).
Personnel Licensing Department is not
responsible for dealing with any enquiries regarding
this licence and associated ratings.
The responsibility for dealing with all NPPL SSEA/
SLMG/Microlight customer enquiries rests with the
following representative bodies:-
For SSEA enquiries contact AOPA.
For SLMG enquiries contact BGA.
For Microlight and Powered Parachute enquiries
contact BMAA.
Contact details can be found in Section A, Appendix E
This means you should contact the organisations stated, NOT CAA PLD; normally one would expect this to by something an Examiner should do, rather than an FI. But no reason why you shouldn't, if your Examiners are unaware of this policy. Or you may, if you wish, contact NPLG Ltd. for whom I am the assistance provider, as well as being the member of the NPPL P&SC currently liaising directly with Head of Licensing.