I can't see any evidence in the article that the vets are "TRAs" and it seems like Alison had caused problems previously in the practice with her demeanour towards staff.
This seems like projection from her, just as it was when she accused TRAs of trying to poison her dogs by throwing a wispa bar into her garden. It turned out a neighbours child had simply thrown it in there.
She needs to provide some evidence of the discrimination, at which point my opinion may change!