Well I have discussed the issue with the CAA and the NPPL people. The CAA PLD told me this morning that we are required to check the medical is valid. Until I am told something different then I will continue to do so.
This discussion is not about the fact that the medical was not checked it is around the fact that the pilot appears to have flown illegally for 3 years following what seems to have been the result of an incorrect NPPL application which could have been picked up at the renewal if the paperwork was read properly. After all that was how I picked it up.......