I did the same as Spruce. NVQ ten years back with Impact 43. One of the attendees was hilarious. Didn't really give a poo whether he passed or not. On one the practical lessons, he dripped dirty water all over a chair from his boab. The instructor asked him to do it again, this time without watering the chair. " are you effing joking"? he asked. "No i'm effing not" said the instructor.
I also did other stuff such as IOSH safety cert's and working at height etc with the FWC.
If you employ, it's especially important to have the first aid, manual handling, ladder safety, ladder/equipment checks etc done and signed by the staff. Then, if there ever is an incident you can prove the steps you took to mitigate against such an occurrence.