Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
In the UK the primary motivating factor for people joining a union is because they have been asked to and provided with the forms.  That requires a unionised workplace.  

Many employers (illegally) actively discourage workers from joining a union and workers can get blacklisted, especially in the construction industry, for union activity or membership.

Construction - blacklisting

In March 2009 the Information Commissioner's Office raided the offices of the Consulting Association and exposed the existence of a blacklist containing the details of 3,213 construction workers.  They also found that the blacklist had been used by over 40 UK construction companies.
by In Wales (inwales aaat eurotrib.com) on Thu Aug 1st, 2013 at 03:28:58 PM EST
[ Parent ]

Others have rated this comment as follows:


Occasional Series