LASORS has the answer and it must be signed to be able to log it as P1.
Doesn't matter what your examiner said/did - it's clearly laid out under recording of flight time case J:
Pilot undergoing any form of flight test with a JAA or CAA authorised examiner
PIC U/S for successful test. P/UT for unsuccessful test
For successful test:
Enter the time in the P1 column and have it certified by the aircraft commander.
For unsuccessful test:
Enter time in 'Dual' column