Depends very much on the person, if a genuine interest in going further then I will brief and do basic effect of control, if as sometimes happens, they book a full hour, then you can do pretty much the full EofC excercise. At the end of the trip I will often try and let them land the aircraft, but this depends on how they are getting on. You will often find if you get them to land that they do a really good job because they are doing as you tell them rather than trying to do it for themself.
Often a trial lesson is done as a present for someone and they are not wishing to go further, in this case I do a very short brief and let them do as much actual flying as
they want to. In both cases I will try to do the preflight without to much explanation apart from enough to keep them interested - idealy I will do this before they even arrive, but of course this is not always possible.
