Yes I did! Altough it was nearly five years ago now but I doubt its changed
As far as I understood any time you were doing a skills test i.e. PPL, CPL, IR etc you didn't actually hold the rating yet so couldn't act as PIC. But seeing as were effectively in control of the flight you could log it as PICUS as long as you passed the test!
I also used 5hrs PIC gliding aswell which saved me a few hundred quid!
Im sure it will be in LASORS someone if u wish to get the "Official lowdown"!