Folks,
There are the practicalities and the legalities.
The UK Examiner is right, but only in terms of the phases of the approach and missed approach. -- effectively the various PANS/OPS segments.
When you are "cleared for approach", the clearance limit is the runway threshold, that is where the approach ends and the landing starts. Sorry I can't give you a reference, time-wise, it is too close to Christmas.
Tootle pip!!