From that Sky News article:
A University of Exeter spokesman said "the safety, security and wellbeing of our students is, and always will be, our primary concern", adding that it had a "zero tolerance for sexual harassment, abuse or assault".
So, if for their security a female Exeter student in a changing area wants to challenge a man who has entered that area, how does she do so without inadvertently appearing to challenge them "regarding personal gender identity" and so be in breach of principle 2 of Exeter's policy statement?