Berlioz,
CAA Information Notice 2017/034 covers the requirements for pilots.
If you can’t demonstrate familiarity with PBN, you must undertake theoretical and practical training and then pass an examination before passing a skill test or proficiency check which includes PBN IR elements.
The LST or PC needs to be on an approved FTD applicable to the type on your licence so I don’t think it can be carried out on the Starspeed FTD.
FNW