The advice on which Union to join is pointless unless you have no Union at your place of work. For example it is no use joining GMB if Amicus is the TU recognised at your company and vice-versa.
If no TU recognition exists at your Company, you should join the TU of choice and recruit enough members to hold a recognition ballot.
Good luck whichever Union/path you take. Being in a TU is far more important than the particular Union you choose....
