Last week, a reader left a message for us: The company suddenly changed her working hours from nine to five to a shift system. The contract clearly stated fixed working hours, but HR said, "The company's business needs it, and you must accept it." She asked if she could resign directly and then apply for permanent residence. Our lawyer Ethan poured cold water on her - 's unilateral resignation may constitute a "voluntary resignation". Not only will she not receive compensation, it may also affect her employer's recommendation letter for subsequent visa renewal.
In the British workplace, contract disputes are more common than imagined: salary deductions without reason, forced changes to contract terms, sudden salary cuts... Chinese people often dare not speak out because of their visa status, but in fact British law provides a complete path to safeguard their rights. Today’s article will take you through the entire process from ACAS free mediation to the Employment Tribunal. Within the three-month time limit, every step must be made correctly.
The first step: fix the evidence and determine whether it constitutes a "fundamental breach of contract"
Not all contract changes are litigable. British law looks at whether the employer's behavior constitutes a "fundamental breach of contract", that is, a serious breach of the core terms of the employment relationship or the implied duty of mutual trust and confidence.
Typical fundamental breaches include:
- Significant salary reduction or salary deduction without negotiation - for example, the annual salary is suddenly reduced from £30,000 to £22,000
- unilaterally changes core work terms - such as changing fixed working hours to shifts and changing the office location from London to Scotland
- was severely demoted or deprived of responsibilities ——Originally managed a team of 10 people, suddenly became an ordinary employee
- maliciously destroys the working environment - continues to humiliate and isolate employees, causing them to be unable to work normally
💡 evidence list (don’t stop once you start collecting):
· Original employment contract + all subsequent written change notices
· Payslip (at least the last 6 months)
· All emails, text messages, and WhatsApp chats regarding contract changes
· If there is a verbal notification, immediately send an email to HR for confirmation afterwards: "As discussed today, you mentioned..."
· Record the specific date, time and people present
If the contract changes have been implemented, you can choose to "continue working under protest" to express your objections clearly in writing to avoid being regarded as tacit acceptance of the new terms. But this is only a short-term strategy, and we must move to the next step as soon as possible.
Step 2: Contact ACAS to initiate Early Conciliation (mandatory pre-processing)
In the UK, almost all employment disputes must be notified to ACAS (Advisory, Conciliation and Arbitration Service) before they enter the Employment Tribunal. This is a mandatory requirement of the law. If does not have an Early Conciliation Certificate issued by ACAS, the arbitral tribunal will not accept your case.
⏰ The iron rule of time limit: 3 months countdown
Currently (May 2026), the time limit for filing complaints for most labor disputes is "3 months minus 1 day after the incident", including unfair dismissal, discrimination, wage deduction, etc. Starting from October, this time limit will be extended to 6 months, but the 3-month rule still applies to disputes currently occurring at .
For example: If your salary is deducted without reason on April 10, 2026, you must contact ACAS before July 9, 2026 to initiate Early Conciliation. When mediation is initiated, the time limit is paused to give you breathing room.
📞 How to start ACAS Early Conciliation
Submit online for (recommended): Visit the GOV.UK Employment Tribunals page and click "Notify Acas about making a claim" to fill out the online form.
Telephone contact: Call the ACAS hotline on 0300 123 1100 (Monday to Friday 8am-6pm, free) and an advisor will guide you through the process.
Once initiated, ACAS will give you and your employer a mediation period of up to 12 weeks (outcomes usually take 4-6 weeks). The mediator will contact both parties individually to understand the claims and try to broker a settlement. If the employer refuses to participate or negotiations break down, ACAS will issue an Early Conciliation Certificate with a unique number (certificate number), which is a necessary material for your subsequent submission of arbitration application.
⚠️ common misunderstandings among Chinese people:
"I am still working in the company. Will I be fired if I contact ACAS?" - ACAS is a neutral agency and the mediation process is confidential. But in practice, the employer will know that you initiated the process. If you are worried about retaliation, it is recommended to consult with an attorney to assess the risk.
Step 3: Mediation failed? Formal submission of Employment Tribunal application
If ACAS mediation is unsuccessful, you will receive a certificate at least 1 month before the final appeal deadline. Don’t delay, prepare the ET1 form (Employment Tribunal Claim Form) immediately.
📋 Key contents of ET1 form
- Your basic information (name, address, contact information)
- Employer information (full company name, registered address)
- ACAS Early Conciliation Certificate No. (one number for each employer)
- Dispute details (time, process, demands) - Speak with facts and attach evidence number
- Amount of claim or request for relief (reinstatement/re-engagement/compensation)
submission method : Submit online (GOV.UK Employment Tribunals) or mail the paper form. Employment Tribunal does not charge an application fee (the fee system has been abolished since 2017).
💰 Potential compensation amount (latest cap in 2026)
From 6 April 2026, the maximum compensation for unfair dismissal will be £123,543. The statutory weekly pay limit rises to £751. However, if it is a case related to discrimination or whistleblowing, there is no upper limit on the compensation, and it may also include compensation for mental damage (injury to feelings).
📌 Special attention for visa holders:
If you are on a Skilled Worker visa, your employer is your sponsor. Filing a labor lawsuit may result in the employer revoking the sponsorship, and you need to find a new employer to take over the visa within 60 days, otherwise you must leave the country. recommends consulting an immigration attorney to assess the impact on your visa before initiating arbitration.
Step 4: Trial preparation and settlement window
Once the ET1 is filed, the employer will be notified and will submit a defense (form ET3). Currently, in some areas, it may take several years from submission to final hearing. During this period, ACAS will continue to provide mediation services (conciliation up to and during tribunal), and many cases are settled before trial.
🤝 Settlement Agreement (COT3 or Settlement Agreement)
If the parties reach a settlement through ACAS, a COT3 Agreement (ACAS Mediation Agreement) is signed, which is a legally binding document. Once signed, proceedings cannot continue, even if the case has been referred to an arbitral tribunal.
Settlement agreements usually include:
- A compensation payment (tax-free up to £30,000)
- Reference letter – crucial for visa renewal
- confidentiality clause
- Both parties will no longer be held accountable
Before signing , be sure to find a lawyer to review the terms , especially the content of the recommendation letter and the impact on future visa applications. Our lawyer Ethan has handled many cases where Chinese people’s subsequent permanent residence applications were questioned by Home Office due to improper wording of settlement agreements.
⚖️ If it comes to the final trial
An Employment Tribunal is a public hearing in which a judge (and sometimes a jury) makes a decision after hearing evidence and witness statements from both sides. You can go to court yourself or be represented by a lawyer (union members can often get union funding). In addition to legal fees, consider the cost of administrative time, investigation costs, witness preparation and reputational risk.
The losing party usually does not need to bear the other party's attorney fees (the practice in British labor arbitration), but if the judge believes that a party has behaved badly or unreasonably, it may award costs.
Written at the end: Don’t let visa status become a reason for silence
When many Chinese people in the UK encounter contract disputes, their first reaction is "Forget it, I have to rely on this job to renew my visa." But you have to know that rights protection does not mean confrontation. British law gives you a complete protection mechanism. ACAS’s mediation success rate is about 70%, and many disputes can be resolved without aggravation.
If you are going through a similar dilemma, suggestions:
1️⃣ Fix the evidence (email, contract, payslip) at the first time
2️⃣ Contact ACAS within the 3 month time limit ( submit online or call 0300 123 1100)
3️⃣ Consult an immigration lawyer simultaneously to evaluate the impact on your visa (you can add our lawyer on WeChat uklvshi)
4️⃣ If you need to calculate the permanent residence time, use 永居计算器 APP to ensure that the number of days you leave the country does not exceed the limit.
Finally, I emphasize: This article is for reference only. Please consult a licensed attorney for specific cases. Cases involving the intersection of labor law and immigration law are particularly complex, and professional advice can help you avoid big pitfalls.
💬 Topic Discussion : Have you or your friends ever encountered workplace contract disputes? How was it resolved in the end? Welcome to share your experience in the comment area and remind each other 👇
data source
1. GOV.UK - Make a claim to an employment tribunal (2026)
2. ACAS - Early conciliation guidance (updated January 2026)
3. Employment Tribunals compensation limits (effective 6 April 2026)
📚 Data source
·https://www.uklegalguides.com/constructive-dismissal-triggered-by-contract-changes/
·https://www.gov.uk/employment-tribunals/before-you-make-claim
· https://castleassociates.org.uk/blog/time-limits-for-employment-tribunal-claims-in-2026