This is to assess the applicant’s fitness to be registered – not their suitability for the particular job. These are not job interviews – they use them to assess fitness against the criteria in the regulations.
"We use this interview to verify the information we have and to gather new information to help us make a judgement about the fitness of the applicant"
It is not a test that the applicant passes or fails. Matters can be re-visited and assessed outside of the interview.