“Employee used leave” is a reasonable justification to use for a trainee not to get their hours, that is in fact on the drop down that the atm and Natca rep have to submit for all their trainees .
So anyone blowing you if a huge part of the problem. Good on you for asking. If that shit happens again refuse to train and ask why that’s not a reasonable justification for you to use as to why your trainee doesn’t get their hours. Ask to see those justifications as well
This is why we have fucking problems for staffing morale etc