Most people meet a trade union when something at work has already gone wrong. A meeting is booked, a letter arrives, and the language in it is unfamiliar. A union is what stands beside you at that point, and long before it. This page explains what that means in practice, without jargon.
Contents
- What a trade union is
- What a union does day to day
- What a union cannot do
- What a union does and does not do
- What a legally trained representative does in a meeting
- Fixing rather than fighting
- What membership costs, and when cover starts
- The evidence on membership
What a trade union is
A trade union is an organisation of workers that acts for its members at work. It is independent of your employer, and funded by member subscriptions, which is why it can take a position your employer dislikes.
That independence has legal backing. Section 146 of the Trade Union and Labour Relations (Consolidation) Act 1992 makes it unlawful for an employer to subject you to a detriment for being a member or taking part in union activities. Section 152 makes dismissal for union membership automatically unfair, with no qualifying period of service. Section 137 covers refusal of employment on the same grounds. You can read more in our guide to being protected for joining a union.
Those protections exist because the work a union does is meant to be uncomfortable for a badly run employer. Most of that work is quiet.
What a union does day to day
Advice comes first. You describe what has happened, and someone who reads these cases every week tells you where you stand and what your realistic options are. That single conversation often changes the outcome, because it changes what you say next.
Representation comes second. A representative attends formal meetings with you: disciplinary hearings, grievance hearings and appeals. Our guide to a disciplinary hearing at work sets out how those meetings run.
Checking your employer’s procedure comes third, and members notice it least. Employers lose cases on process. A union reads the invitation letter, the policy, the evidence pack and the timings, then names what is missing. Withheld evidence, an investigator who also chairs the hearing, or a decision taken before the meeting are all points to raise while they still matter.
Where an employer recognises a union, it also negotiates collectively on pay, hours, holiday and restructures. Collective agreements are how most workers gain without ever attending a hearing.
What a union cannot do
A union cannot overturn your employer’s decision by itself. The decision belongs to the employer. What a union does is force the decision to be made properly, and challenge it on appeal or, if needed, at tribunal.
A union is not an insurance policy against every outcome. Some dismissals are lawful and some redundancies are genuine. Good representation improves your position; it does not guarantee your job.
A union does not act as your solicitor. National Employees Union representatives are legally trained. They advise on employment procedure and represent you in workplace meetings and processes. They are not solicitors and do not hold themselves out as such.
What a union does and does not do
| What a union does | What it does not do |
|---|---|
| Gives you advice before you reply to your employer | Answer for you or take the decision out of your hands |
| Attends disciplinary and grievance hearings with you | Overturn the employer’s decision on its own |
| Checks the employer followed its own policy and the ACAS Code | Rewrite the policy your employer uses |
| Questions the evidence and the timeline | Manufacture evidence or coach you to mislead |
| Helps you appeal, and drafts the grounds | Guarantee the appeal succeeds |
| Negotiates collectively where the union is recognised | Bargain where the employer does not recognise a union |
| Supports you through tribunal steps and time limits | Act as your solicitor in court |
The line between those two columns is where most misunderstandings sit. The clearest way to see it is inside the room.
What a legally trained representative does in a meeting
You have a statutory right to be accompanied at formal disciplinary and grievance hearings under section 10 of the Employment Relations Act 1999. That right covers those hearings only, which our guide to the right to be accompanied explains in full.
In the meeting, your representative keeps the process on track. They confirm the allegation, the evidence for it, and the policy being applied. If the employer strays outside the letter, they say so at the time.
They raise points of procedure and substance. Procedure covers notice, disclosure, the decision maker and the right of appeal. Substance covers whether the evidence shows what the employer says it shows.
They question that evidence. Dates get checked, gaps get named, and assumptions get separated from facts. They sum up your case at the end, so the record carries your position and not only the employer’s.
They do all of it with courtesy. Aggression in a hearing hands the employer a second problem to point at, and it rarely moves the decision maker.
Fixing rather than fighting
The National Employees Union works by fixing rather than fighting. Most problems are cheaper and faster to resolve early, at the lowest formal level that works: a clear written grievance rather than a public row, an appeal rather than a resignation, an agreed change rather than a claim.
Escalation stays available. Where an employer will not put things right, the route runs through appeal, ACAS early conciliation and, if necessary, the employment tribunal. Time limits are short. Most tribunal claims must be brought within six months less one day where the events fall on or after 1 October 2026, and within three months less one day before that, so early advice is worth more than late advice.
What membership costs, and when cover starts
Membership costs £25 for the first month, then £15 a month. Advice and representation are included once you have been a member for three months.
If you need help inside your first three months, there is a surcharge of £237, in effect since 1 July 2026, and it is not reimbursed. The reason is plain: the subscriptions of members who never need help pay for those who do. The surcharge is roughly eighteen months of membership, which is why joining before trouble starts is cheaper.
The evidence on membership
Union members earned 5.3% more on average than comparable non-members in 2025, up 0.5 percentage points, according to the Department for Business and Trade and the Office for National Statistics. That is a workforce average, not a promise about your pay.
There is also a knowledge effect. Sixty-four per cent of union members hold a degree or other higher education qualification, against 51% of non-members. The useful reading is not about people, it is about information: the workers who know their rights are the workers who keep their jobs.
FAQs
Do I have to tell my employer I have joined a union?
No. Membership is private, and you can take advice without disclosing it. You would normally name your representative when you ask to be accompanied at a formal hearing.
Can my employer treat me badly for joining?
No. Section 146 of the Trade Union and Labour Relations (Consolidation) Act 1992 prohibits detriment for membership or activities, and section 152 makes dismissal on that ground automatically unfair with no qualifying period.
Does a union work if my employer does not recognise one?
Yes, for individual matters. You still get advice, and you can still be accompanied at formal hearings. Only collective bargaining requires recognition.
Are union representatives lawyers?
No. National Employees Union representatives are legally trained and represent you in workplace processes. They are not solicitors and do not act as your solicitor.
Does joining protect my job?
Not on its own. Research going back to Richard Freeman’s exit-voice work, largely American and now old, finds longer tenure and lower quit rates among union members. Those are correlations, not proof that joining causes job security.
How the National Employees Union can help
You get advice from legally trained representatives, representation at formal hearings, help with appeals, and support through ACAS early conciliation and tribunal deadlines. If you are already in a process, start with our disciplinary and grievance guide. If you are weighing it up, read is joining a trade union worth it, then how to join a trade union.
Join the National Employees Union, or ask us a question first.
Written by the National Employees Union team. Correct as at 24 September 2026.
Sources
- Trade Union and Labour Relations (Consolidation) Act 1992, sections 137, 146 and 152
- Employment Relations Act 1999, section 10, the right to be accompanied
- Department for Business and Trade, “Trade union membership, UK, 1995 to 2025”, published 28 May 2026
- ACAS Code of Practice on disciplinary and grievance procedures
- Employment Rights Act 2025 (Commencement No. 5 and Transitional Provisions) (Amendment) Regulations 2026, tribunal time limits from 1 October 2026
Join the National Employees Union
Membership is £25 for the first month, then £15 a month.
