Thanks Beagle, that was how I interpreted it but needed someone wiser to confirm my thoughts!
It seems the pilot never thought to actually check the NPPL was correct when he got it. The examiner at the last renewal signed the CAA license page which shows SEP Land but I suspect thinking it was the NPPL page without checking the reference number at the top. A poor show on the part of the examiner I think.
So according to my calculations the pilot has not actually made a legal flight in nearly 3 years apart from his hour as PUT in March!
Will he have to do a skill test or just differences training and have me add SEP Land to his license?