^^^ Googles refuses to accept that 'rhinarians' is a valid word. I'd love it to be right though as it would be an interesting twist on references to the dental profession, which is what cryptic crosswords about 'workers' and 'bridge' usually seem to lead to.
I'd also seen that 'librarians' fits but, unless JJ109's Glaswegian reference is relevant, I can't see why it could be the answer.