Heli Training Comm 1/2005 states that for SE & ME <3175kgs a 1hr flight is required for differences, >3175kgs then 3hrs is required. The training should include groundschool and the flight carried out by an approved TRTO with an aproved differences syllabus. The training captain carrying out the training should sign your logbook or provide a record of training to show that you have been trained.
No OPC or LPC paperwork.
FNW