NB, in current UK English "matriculation" describes the process whereby the student is formally enrolled by the university. It is a formality and happens after

NB, in current UK English "matriculation" describes the process whereby the student is formally enrolled by the university. It is a formality and happens after they arrive at the university but before they are taught anything. A matriculation photo is taken by the college at the beginning of the first term. That is all there is to it.