HD,
I am not comparing the standard required. I am comparing the systems that follow a sylabus of training and sets standards for certain stages of training/qualification.
Provided that a person demonstrates the appropriate standard at whatever stage in whatever system, it is not the responsibility of the instructor who provided training during that stage if the student, PPL, ATCO or whatever ignores or forgets or accidently does not follow the training or instructions given.
To follow Niknak's line here, perhaps we should haul the CAA over the coals because this person was probably given a pass in the Air Law Exam but failed to follow the part of the Air Law sylabus pertaining to operations within Class D airspace.
Regards,
DFC