No doubt a dumb question.
Why is a Union also a contractor?
In the UK Unions don't run companies, they just tell them off. So the fact that it's a union that seems to be more of a big building contractor seems a bit of a confusion to me.
Anyone able to tell me a little bit more here as there Wikipedia page just refers to it as a Union. But then the wikipedia page also makes it sound wholy american so I might be looking at the wrong thing