In an attempt to prevent this running to zillions of pages....
1) You can log it as either P1 or P UT, as already stated.
2) There aren't many instances in which you need P1 hours as opposed to total hours.
3) If you think you do need P1 hours, and want to change them, go through your logbook with tippex (the tape is neatest) and do so. You can do it neatly, and the CAA have never minded loads of tippex and changes in my log book, so I see no rreason why they should in yours.
4) The CAA don't usually get too upset on what you count, whether it's brakes off to on, datcom time, or whatever. Yes, it may make a slight difference, but I've never heard of it being an issue.
Your choice really. And although the question was fine, I suspect the answers will run and run to the point where some of us lose the will to live
Go on then - prove me wrong!
