Joining another trade union might be a great option. Here's a recent statement from Affinity:
"In the last two years we've dealt with an increasing number of cases where complainants of one persuasion or another have sought to silence people with whom they disagree, by making complaints to their employers. These complainants, sometimes anonymous and often incoherent, have argued that they have been offended in some way and that the individuals they disagree with should be dismissed. Most cases should have been kicked into touch early on but corporate cowardice has meant that disciplinary cases have followed.
(...)
Affinity is non-political and has no ideological stance, except our determination to fight discrimination of any sort wherever members experience it and defend free speech. Put simply, we believe in the rule of law.
Earlier this week, an Employment Tribunal published its Judgement on the case of Allison Bailey. Ms Bailey is a black, lesbian barrister who argued at the Employment Tribunal that she had been victimised and discriminated against by her employer, Garden Court Chambers, after she expressed gender critical beliefs.
(...)
Ms Bailey’s case is an important reminder that employers must respect the rights of staff to freedom of expression. We’ve dealt with a significant number of free speech at work cases and have found that all too often, the prevailing corporate culture is pro-political correctness to an extreme degree. This creates an immediate conflict between individuals’ rights to freedom of expression and the corporation’s (often just a junior manager’s) demand that they toe an ideologically pure line.
Senior managers are ultimately responsible and accountable for what happens in their organisations and they have to decide whether they’re going to defend the right to freedom of expression in their workplaces in cases where people are attacked unjustifiably for expressing views which are protected by law.
(...)
It’s stating the obvious to say that employers are in powerful positions relative to staff and, unless employees are represented by an effective trade union with a preparedness to fight for free speech, it’s often impossible for them to stand up for their rights. We find that employers start to behave far more reasonably the moment we become involved.
We’ve decided that we have an obligation to act in the interests of all our members, irrespective of the views they hold, and the best way of dealing with that is to focus on protecting their rights under the law, including their rights to free speech. We refuse to take a particular stance on political issues and remain neutral so that we can represent all members effectively. Our members can be certain that, whatever views they hold, we will always fight to protect their right to hold those views under the law.
The same cannot be said for those trade unions, which have aligned themselves with agendas that are in conflict with the views and interests of their members.
Because their unions proved unprepared to defend free speech, a significant number of members, most notably university academics, have joined us over the last two years."
This is a far cry from UCU. Sorry for the long post but having just seen Jo Grady's latest Dolores Umbridge style performance on twitter, I couldn't help myself.