i was in st johns for 10 years so know a fair bit of first aid and i try to do refresher courses when i can, thing is they change their minds so often with the "correct" way of doing things, and unless its really life or death situation id keep back and make sure 999 was called, not so much a sence of not knowing what to do but the person involved you dont know what they are like, what if you dont do something by the book and the person knows it they could try and sue you, so many adverts with medical misconduct or accidents you could end up worse off.
I do agree with knowing basic first aid though could help save your mates life or family member. Maybe local area clubs if they were interested could look into getting a basic course organised.