Mr Moto. If the turn back manoeuvre is to be introduced into the PPL syllabus (presumably this is in UK?) - then lawyers will have a field day after the first fatality.
While a thorough discussion on the pros and cons of a turn back is desirable from the students viewpoint, there is no way that the manoeuvre should be practiced anywhere near the ground.
Having personally seen the gruesome sight of two burnt out aircraft (killing the crews) which crashed as a result of practice - I say again - practice turn backs, I am astonished that the lessons of the past could yet again be ignored.