Nonsense, a name has been supplied to a web domain hosting company. Does that mean that Unite should apologise because a name has been supplied?
Given that this person's name has been reported in the press, i'd certainly expect them to publicly refute that any of their representatives had anything to do with it if they were in a position to do so.
If they are unable to deny it for the reason that said person was involved, then it is completely unacceptable for them to say nothing on the matter.
Let's not forget that Unite have accused BA of spreading misinformation to the press. It is complete double standards for their representatives to then do the same.