any skills test:
if you fail, its dual time
if you partial, its dual time
if you pass its p1 time AS LONG AS the examiner signs you logbook.
eg: you partial your IR and need to go up again in which you then pass. the partial is put under dual time, but the next flight which you pass on in p1 as long as the examiner signs it.
if they do not sign your logbook, the caa may tell you that you can not log the flight as p1.