If you hold a UK licence (or will be applying for your JAA ATPL through the UK) then you MUST log your sectors as P1u/s.
WHY?.....
When it comes time to upgrading you frozen ATPL, amongst other things, you must show (do not quote me on the exact hour requirements) 250hrs P1. If you have come from Oxford etc you will have around 100 hrs P1; made up by 50Hrs solo and 50 P1u/s or SPIC. (if you hold a CPL you have already met this requirement)
The rest comes from your airline job. These first 250hrs must be counter signed by the Captain, although the CAA will accept a letter from the company.
Once you have the required 1500hrs, including the night, multi-pilot, etc you can then and only then (+1500hrs) take a skills test. This form can be downloaded from the CAA, or may even be part of the OPC/LPC forms (not sure now as I was with an Irish company) Present it at the briefing during your next company sim check and ask the examiner to sign it, if he feels able! It’s nothing more than the usual OPC/LPC.
NB. if you have 1400hrs and are approaching your sim check you can include 100hrs sim time to get up to the 1500hrs; this way you don’t have to wait another six months for your new green licence, and possible pay rise.
Take 5mins each day and rewrite your log book. I did. I think that a scruffy, crossed out log book says a lot when attending a job interview. Of course now I just file my coffee stained, scrappy ACARS print outs…….now where did I put that gaffer tape and string!!!!!!
Hope this helps