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Join the Claim is not a law firm. This information is for general guidance only and does not constitute legal advice. While every effort has been made to ensure the information is accurate, regulations, details, and legal proceedings may change.
If a company’s wrongdoing has affected you and others, a group claim could help you seek compensation.
When thousands — sometimes millions — of people are affected by the same issue, the law allows them to come together and take action as a group.
This is known as group litigation (often called a group claim or collective action).
But before you sign up, it’s important to understand how it works, what to expect, and whether it’s right for you.
This guide walks you through everything — clearly, calmly, and without legal jargon.
A group action claim brings together individuals who have suffered similar harm from the same organisation. Instead of everyone bringing separate cases, the claims are managed together.
That might involve:
A good way to picture it is this: everyone still has their own claim, but the shared legal and factual questions are dealt with in a coordinated way. That reduces duplication, makes the case more manageable, and can make it more realistic to pursue.
For example, when universities were forced to close campuses during Covid and industrial strike action disrupted teaching, large groups of students explored collective breach of contract claims relating to tuition fees.
Group litigation exists because the traditional “one person versus one company” model does not always reflect how harm happens in modern life.
Sometimes harm is widespread and caused by the same underlying decision, system, or practice. Sometimes it’s complex and expensive to investigate properly. And sometimes the value of each individual claim is modest — even though the overall impact is enormous.
Group claims solve several practical problems at once:
You can see this logic in action across many types of UK group litigation — including major emissions claims, large-scale data breach claims, and collective consumer claims where the alleged misconduct affected huge numbers of people in the same way.
Not all group claims work the same way. The structure depends on the legal framework being used. Most commonly, claims fall into one of two categories.
In opt-in claims, you must actively sign up and instruct a solicitor. Your name is added to a register (or a formal list of claimants) and your claim is managed alongside others.
Opt-in claims often operate under a Group Litigation Order (GLO) or other coordinated case management. The court manages shared issues together while allowing individual loss to be assessed separately.
This is a common structure in data breach litigation. For example, in litigation relating to the Marks & Spencer data breach, individuals had to actively register and instruct solicitors to become part of the group action.
Opt-out claims are more limited and usually relate to competition law. In these cases, eligible UK consumers are automatically included unless they choose to opt out. You don’t need to sign up to be included. However, if the case succeeds, you typically need to register at the end to receive compensation.
Understanding which type of claim you’re dealing with is essential, because it determines what action — if any — you need to take.
One of the biggest problems in collective litigation is awareness.
In opt-in claims, awareness is often the difference between being included and missing out entirely. People can be directly affected by wrongdoing and still never join a claim, simply because they never heard about it, didn’t understand it, or assumed it sounded “too legal” to apply to them.
This is especially common where:
It’s also worth saying this plainly: group litigation does not always come with a single, central “official” place that affected people naturally go to find information. If you’re not actively following legal news — or you don’t know what to search for — it’s easy to miss.
That’s why awareness and plain-English explanation matters. People can’t make informed choices about legal action if they don’t know it exists, or if the only information available is confusing, overly technical, or written for lawyers.
A lack of awareness is particularly problematic when it comes to opt-out claims, with large proportions of eligible consumers often unaware they are included.
In some historic cases, only a small percentage of eligible individuals came forward to claim compensation after settlement. That means compensation goes unclaimed and people miss out on money they are entitled to.
In Gutmann v Stagecoach, around 1.4 million travellers were affected and a settlement of up to £25 million was approved in 2024. But, as of mid-2025, only £216,604 had actually been claimed. Because uptake was so low, the settlement fund was reduced to £10.2 million. In addition, £3.7 million of unclaimed damages was redistributed to the Access to Justice Foundation.
At Join the Claim, we are attempting to right that wrong. We are not a law firm. But we are explaining what claims exist, how they work, and what steps — if any — you need to take.
Because we passionately believe that collective justice only works if people know about it.
Group litigation has grown rapidly in the UK, and for good reason. It offers several advantages over going it alone.
First and most importantly, it spreads risk and cost. Legal action can be expensive. But in group claims, costs are shared across the group. Most are run on a no-win, no-fee basis, meaning:
You should always read the terms carefully, but this model removes much of the financial barrier that would otherwise prevent people from pursuing justice.
When thousands of people are affected, the claim carries greater weight. Defendants are more likely to take it seriously. Media attention can increase scrutiny. And courts are more willing to address systemic issues when evidence shows harm wasn’t isolated.
You see this dynamic in long-running, large opt-in claims such as emissions litigation: the sheer scale of consumer impact changes the pressure, the resourcing, and the seriousness with which the issues are approached.
Large-scale claims are typically handled by experienced solicitors who understand complex litigation. They can also instruct specialist counsel and experts where needed.
As an individual claimant, you might never access that level of expertise alone. Or it would be financially unrealistic to try.
Group claims can drive wider change. Successful cases often lead to improved business practices, tighter compliance, and stronger consumer protections.
Compensation matters, but so does accountability. For many people, the point is not only redress, but stopping the same thing happening again.
Group claims are powerful. But they are not perfect. Here are the main trade-offs to think about before you commit.
The most significant trade-off is control. When you join a group claim, strategic decisions are usually made by the legal team and, in some cases, appointed representatives. You may not have a say in settlement negotiations or timing.
If the group accepts a settlement, it applies to everyone. You cannot usually pursue the same issue separately later.
Group claims can take years. That is not because nothing is happening — it’s because complex litigation takes time. Delays can arise from:
If you need a quick outcome, group litigation may feel frustrating.
Compensation is rarely “one size fits all” in opt-in litigation. Awards are usually tailored to reflect levels of harm. Some people expect a dramatic payout and feel disappointed when the reality is more modest.
That does not mean the claim isn’t worthwhile, but expectations need to be grounded from the start.
Finally, while no-win, no-fee arrangements reduce risk, you must understand the small print. In some circumstances — for example, if you withdraw outside a cooling-off period — costs may arise.
None of these factors means you shouldn’t join. But you should make the decision with your eyes open.
Before joining, ask yourself a few honest questions.
Is your issue part of a wider pattern affecting many people? Group claims work best where harm is systemic. If your situation is highly individual, a personal claim may be more appropriate.
What is your goal? If you want public accountability and are prepared to wait, a group claim may be a good fit. If you want a fast, highly personalised resolution, it may not.
In any collective action, you will likely give up some control over strategy and settlement discussions. If individual control is important to you, this may feel restrictive.
Group claims often require patience. Be realistic about what you might receive and weigh that against time, attention, and uncertainty.
If you decide to move forward with an opt-in claim, the process usually follows a structured path. Opt-out claims have a different process.
You might hear about a claim through the news, through a law firm, or through a consumer claim hub that tracks ongoing actions and explains them in plain English, such as Join the Claim.
At this stage, the key is not to assume you’re eligible (or ineligible) based on headlines. Eligibility often turns on specific facts, dates, and how you were affected.
Once you’ve identified a claim that matches your circumstances, you’ll need to check eligibility. This usually involves confirming:
Some firms offer online eligibility checkers; others confirm eligibility after an initial review.
If eligible, you’ll be asked to sign a legal agreement. This is often a Conditional Fee Agreement (no-win, no-fee). Before signing, make sure you understand:
If you’re happy, this is the point where you officially join the action.
After signing, you may need to provide documents. This could include proof of purchase, bank statements, correspondence, or a short statement explaining your experience. Not every claim is document-heavy, but you should assume you’ll need to show something that links you to the issue.
Once the group is formed and the claim is underway, the legal team handles the bulk of the work. That usually includes building evidence, managing court directions, responding to the defendant’s arguments, and progressing the case through key stages.
In broad terms, group claims often move through some combination of:
Many group claims settle before trial, but there is never a guarantee.
The phrase “no win, no fee” is widely used — but it doesn’t mean “free”. It usually means you don’t pay your solicitor’s legal fees if the case is unsuccessful.
If the case wins, the solicitor takes a pre-agreed success fee, usually a percentage of your compensation and sometimes subject to a cap.
Here’s what that can look like in practice:
Some claims also involve After the Event (ATE) insurance, designed to protect against the risk of paying the other side’s costs if the claim fails. If ATE insurance is in place, the premium is often payable only if the case succeeds — and may be deducted from compensation.
The key point is transparency. Before you sign anything, you should be able to answer these questions in plain English:
If fee structures are unclear, ask. You are entitled to understand what you are agreeing to.
In most group claims, compensation is not split equally.
That’s because the law generally aims to reflect individual impact. Courts and solicitors often group claimants by level of harm, such as:
Your legal team will usually manage the distribution process and communicate clearly about next steps, including what information they need from you and when.
Opt-out claims often require eligible people to register at the end to receive compensation. This creates a real-world risk: even if a case is successful, many people may not claim because they never hear about the outcome or don’t realise they need to take a final step.
That doesn’t make opt-out claims “bad”, but it does mean distribution can be one of the weakest links in the process if awareness and communication are poor. It’s one of the reasons consumer-focused explanation and signposting matters.
Every legal claim has a limitation period. In simple terms, this is the deadline by which you must start court proceedings.
The time limit depends on the type of claim. For example:
In group claims, the clock usually applies to each individual claimant. Missing the deadline can mean losing the right to claim entirely. This is another reason awareness matters. You can’t protect your rights if you only learn about a claim after the window has effectively closed.
Group claims don’t just deliver compensation. They can also expose governance failures, compliance gaps, and unethical practices.
When systemic issues are tested in open court — or scrutinised through a serious legal process — industries tend to respond. That response might be a change in corporate behaviour, stronger compliance, better safeguards, or increased regulatory attention.
We’ve seen collective actions drive:
In that sense, joining a group claim is not just about redress. It’s also about standards.
In the UK, billions of pounds in compensation are on the table.
Your go-to hub for consumer group claims – minus the legal mumbo-jumbo – at Join the Claim, we’re rewriting the rules of empowerment. So you don’t miss out on your share.
While we may take a fee from the law firms we introduce you to, this won’t impact the cost of your claim or any compensation you receive.
Think of us as the ultimate matchmaker for justice seekers like you.
Group litigation is one of the most powerful tools available to consumers in the UK. It makes justice more accessible. It spreads risk. It increases accountability.
If you think you may have been affected by a wider issue, the most important step is to stay informed. Check whether a claim exists. Understand whether it is opt-in or opt-out. Read the terms carefully. Ask questions if anything is unclear.
Collective action works best when people understand it. And when they join with confidence.
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Yes — provided the claims relate to separate harms. If you were affected by two unrelated issues involving different companies, you can usually join both. However, you cannot recover twice for the same loss. If two claims overlap, legal teams will need to assess how responsibility is apportioned. If you’re unsure, ask your solicitor before proceeding.
Often yes — but the terms matter. Most agreements include a cooling-off period. After that, withdrawal rights and potential fees depend on what you signed. In some circumstances, you may be asked to contribute to costs incurred up to that point.
You remain included. But if compensation becomes available, you may need to register to receive payment.
Most claimants never attend court. Your legal team handles the proceedings. In some claims, a small number of “test cases” may be selected to resolve common issues, but that does not usually mean every claimant has to appear or give evidence.
It varies widely. Some settle within a year or two; others run for several years, particularly if there are complex legal arguments, technical evidence, or appeals. A good legal team should set expectations early and keep you updated as the timetable develops.
It depends on the claim, but you should assume you’ll need something that links you to the issue — such as proof of purchase, account records, correspondence, or confirmation you were affected. Even when evidence requirements are light at the start, you may be asked for proof later (especially at compensation stage).
We connect consumers with their legal dream teams to ensure they get the compensation and support they deserve.
Join the Claim is not a law firm. We connect individuals with top law firms for group or individual claims, and our service is free to use. While we may receive a fee from the law firms we introduce you to, this will not affect your costs or compensation. We are not responsible for the advice or services provided by these firms. Please note, nothing on this website is legal advice, and while we check claim eligibility, we cannot guarantee a law firm will accept a case.
Join the Claim is a trading name of Join the Claim Limited, authorised and regulated by the Financial Conduct Authority (FRN: 1053404). Registered in England and Wales, Company No: 16245278. Registered office: 32 Eyre Street, Sheffield, S1 4QZ.
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