For the purpose of this Part, the competent authority shall be an authority designated by the Member State to whom a person applies for the issue of pilot licences or associated ratings or certificates.
So for the UK the competent authority is the CAA. This means that their "one day" sitting is legal.
A. Maybe CAA thought ........
B. Maybe they thought........
C. Maybe they haven't considered...
I'd go for option C every time!