I haven't seen any thing so silly in ages.
Beagle etc. should know better.
Part 2 of GID 44 has if all laid out in black and white. Nothing much has changed with JAR. OK one more time.
P1 Only the commander nominated before the flight (Beagle) can log the time as P1
P2 can only be logged on multi crew aircraft by the first Officer
PIC u/s only for a pilot undergoing any form of flight test (FIs cannot do flight tests). Ecemption to that a first officer on a multicrew aircraft may log any complete sector as PIC u/s if s/he is performing the duties of P1)
Pu/t Pilot under instruction for the purose of gaining a licence or rating, or for conversion to an aircraft type within an aircraft rating group or class.
Lets not be silly with this, if you are checking out a club member decide before hand who is PIC, but if the club member is out of club currency it may be illegal (insurance wise) for the member to be PIC.
The member may only log PIC u/s if he has opted to do a proficiency check with an examiner. So the member otherwise must log Pu/t as you are checking the standard of ability the pilot has and if nessesary retraining him/her. If in doubt make it a refresher training flight crosswind landings or something.
Beagle, you cannot split a flight as you meantioned in a earlier posting. That is very wrong. Only the nomiated commander can log the time P1.