At the end of the day the cwu is a voluntary organisation and has not been a closed shop for decades.
However for an employer to recognise a different union then there has to be a ballot of the whole workforce and majority has to vote in favour. In short it is not going to happen. Yes you can take Andy`s option and join a different union but the fact is that you will have no voice in the workplace.
Now lets get one thing clear it seems most of the people who are now anti union are so because of the changes to things like door to door and early shift allowance. Both of these were negotiated and agreed by the CWU at a time when door to door or households as they used to be were done by reserves , casuals , overtime or not at all. Royal Mail were never going to allow this growth area to remain as it was and the CWU managed to trap the money going forward. The same with allowances , when you have sequencing there will not be the same number of people who start at 5 or 5.30.
I think we all would love to go back to the old days when we got paid extra for delivering mail sort , or got traffic related payments , or could finish early and ghost overtime but those days have long disappeared and the industry globally has changed as we all know and of course we have DSA and a whole range of other problems which make it harder for us all.
The CWU has to decide when the time is to do the deal as it did when SFMB was in place with the introduction of part timers in the 80s and automation , it had to do so with the removal of IWM , it had to do with DRAS , PBS , Way Forward , the removal the second delivery , pay and mod and now with this agreement. The key is did we get the timing right. I think we did , some think not and of course some think that Royal Mail would have kept paying out for door to door on the old system and tunring work around and having poor quality . Well those people are the ones who are short sighted not the CWU and in line with the CWU rule book the members voted in favour of the agreement.
So if you choose to leave the CWU then that is your right but you will still have the CWU deciding how the job is worked via national agreements, but this time you will not have a voice or a vote.