Thanks for the replies.
The pilot who prompted the post was particularly bad.
Before the flight I explained what we would do and asked a few questions to make sure that he understood
The intention was to do the following:-
Steep turns
Stalls
PFL
Then back to the field for three circuits, the first normal then flapless and a glide approach.
The flying was so poor that we only had time to do part of the detail but I did'nt consider him to be dangerous so I asked him to come back for another flight and signed his logbook to say he had completed a one hour flight with an instructor.
I was'nt particularly happy about signing the book but was unsure whether I could refuse and on what grounds. I Know better now.
It would be interesting to hear what standards other instructors expect for this type of flight.