Be like dad keep mum!
Well, Single Spey, you ask a fair question.
The NPPL holder is required to send their Medical Declaration to the group for recording each time the 'declaration' is signed. The JAA process is done online by the AME and therefore is recorded direct with the CAA.
The current exemption is no doubt a good thing but not thought through in respect to your question, its been done in a hurry. Read the exemption thoughtfully, comply with it, don't look for problems and sleep soundly at night. No one is expecting any more of you than that.
However, should you wish to be assured, respectfully send a copy of the Medical Declaration to PLD at Gatwick, they are after all trying to be helpful and should be respected for their efforts.