There is no P1US.
There is
PICUS (pilot in command under supervision) under JAR
and
P1/S (P1 under supervision) under CAA
Neither is appropriate for either of the flights mentioned, as FFF says
LASORS only lists a very limited number of cases where P1US can be used, though, and this is not one of them.
Option 3 is a good choice.
2D