This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Employment Tribunal appeal grounds define the legal reasons a tribunal decision can be challenged in England and Wales. This guide explains errors of law, procedural unfairness, jurisdictional mistakes, and other valid grounds for appeal to the Employment Appeal Tribunal.
An Employment Tribunal appeal allows a party to challenge a tribunal's decision if there is a legal basis to do so. However, appeals are not a rehearing of the case. They are strictly limited to specific legal grounds of appeal, meaning the appeal must show that the tribunal made a legal or procedural error rather than simply reaching the “wrong” conclusion on the facts.
Understanding the definition of appeal grounds in Employment Tribunal proceedings in England and Wales is essential for anyone involved in employment disputes, including unfair dismissal, discrimination, whistleblowing, redundancy, and pay-related claims.
Employment Tribunal appeals are made to the Employment Appeal Tribunal (EAT), which focuses only on points of law.
What Are Appeal Grounds in Employment Tribunal Cases?
Appeal grounds are the legally recognised reasons why a party can challenge an Employment Tribunal decision.
In simple terms, they define the types of mistakes the tribunal must have made for an appeal to be allowed to proceed.
Appeal grounds do not include:
- Disagreement with factual findings
- Preference for a different outcome
- Re-arguing witness credibility
Instead, they focus on whether the tribunal:
- Applied the law correctly
- Followed proper procedure
- Reached a decision that was legally sustainable
Legal Basis for Employment Tribunal Appeals
Employment Tribunal appeals are governed by:
- Employment Tribunals Act 1996
- Employment Appeal Tribunal Rules 1993 (as amended)
- Case law interpreting errors of law and procedural fairness
The Employment Appeal Tribunal (EAT) only has jurisdiction to hear appeals on questions of law, not factual disputes.
Definition of “Grounds of Appeal”
In Employment Tribunal law, grounds of appeal refer to the specific categories of legal error that may justify overturning or varying a tribunal's decision.
These grounds must be clearly set out in the appeal notice (commonly using form ET1 appeal/EAT1), and must explain:
- What the tribunal did wrong
- Why it was legally wrong
- How it affected the outcome
A valid appeal must identify an “error of law” or serious procedural irregularity.
Main Grounds of Appeal in Employment Tribunal Cases
1. Error of law
This is the most common ground of appeal.
An error of law occurs when the tribunal:
- Misinterprets legislation (e.g. Equality Act 2010, Employment Rights Act 1996)
- Applies the wrong legal test
- Fails to apply relevant legal principles
- Misunderstands the legal framework of the claim
Example:
A tribunal applies the wrong test for unfair dismissal, such as failing to consider the band of reasonable responses.
2. Procedural unfairness
A decision may be challenged where the process was unfair.
Examples include:
- One party not being given a fair opportunity to present their case
- Failure to allow relevant evidence
- Bias or apparent bias
- Improper case management affecting fairness
Procedural fairness is a fundamental requirement of tribunal proceedings.
3. Failure to give adequate reasons
Tribunals are required to provide sufficient reasoning for their decisions.
An appeal may be based on:
- Incomplete or unclear reasoning
- Failure to address key issues
- Inability to understand why the tribunal reached its conclusion
Written reasons must allow parties to understand how the decision was made.
4. Misapplication of legal tests
This occurs where the tribunal:
- Identifies the correct legal test but applies it incorrectly
- Misunderstands the threshold for liability or burden of proof
Example:
Incorrect application of the burden-shifting provisions in discrimination claims under the Equality Act 2010.
5. Findings unsupported by evidence (perversity)
A decision may be appealed if it is “perverse”, meaning:
- No reasonable tribunal could have reached the conclusion based on the evidence
- The finding is not supported by the factual record
This is a high threshold and is rarely successful.
6. Jurisdictional error
This occurs where the tribunal:
- Hears a claim it has no legal power to determine
- Fails to recognise that a claim is out of time
- Misinterprets its statutory jurisdiction
Jurisdictional issues often arise early in proceedings but can still be appealed if decided incorrectly.
What Is Not a Valid Ground of Appeal?
Many attempted appeals fail because they do not meet legal thresholds.
Not valid grounds include:
- Disagreement with witness credibility findings
- Claiming the tribunal “got it wrong” on facts alone
- Re-arguing the entire case
- Requesting a rehearing of evidence
The EAT does not re-evaluate factual evidence unless there is a clear legal error.
How Appeal Grounds Must Be Presented
Appeal grounds must be:
- Clearly structured
- Legally focused
- Specific to the alleged error
- Supported by references to law or procedural rules
A vague or general disagreement is insufficient.
A valid appeal typically includes:
- Identification of the legal error
- Reference to relevant law or case principles
- Explanation of impact on the outcome
Time Limits for Employment Tribunal Appeals
The standard time limit is:
- 28 days from the date the written judgment is sent
This applies to appeals submitted to the Employment Appeal Tribunal.
Late appeals are only accepted in exceptional circumstances, where there is a strong reason for delay and the interests of justice justify it.
What Happens After an Appeal Is Filed?
Once appeal grounds are submitted:
- The EAT reviews whether the appeal discloses a reasonable prospect of success
- If valid, the appeal is permitted to proceed
- The respondent may submit a response
- A preliminary consideration may take place
- A full appeal hearing may be listed
The EAT may:
Possible Outcomes of an Appeal
If appeal grounds are successful, the EAT may:
- Set aside the original decision
- Substitute its own decision (rare)
- Order a rehearing before a new tribunal
- Vary part of the judgment
If unsuccessful, the original decision remains binding.
Importance of Appeal Grounds in Employment Law
Appeal grounds are critical because they:
- Define the legal limits of the appeal
- Determine whether the case can proceed
- Filter out disputes that are purely factual
- Ensure tribunal decisions are legally consistent
They are a key safeguard in the UK employment justice system, ensuring decisions comply with legal standards and procedural fairness.
Common Questions
Can I appeal just because I disagree with the outcome?
No. An appeal must be based on a legal or procedural error.
Do I need legal representation for an appeal?
It is not required, but appeals involve complex legal reasoning, particularly around identifying errors of law.
Can new evidence be introduced on appeal?
Generally no, unless it relates to procedural fairness or could not reasonably have been obtained earlier.
What is the difference between appeal grounds and reconsideration?
- Appeal grounds: legal errors reviewed by the Employment Appeal Tribunal
- Reconsideration: tribunal reviews its own decision in limited circumstances
Key Takeaways
Employment Tribunal appeal grounds define the specific legal reasons a tribunal decision can be challenged. These include errors of law, procedural unfairness, inadequate reasoning, jurisdictional mistakes, and decisions that are perverse or unsupported by evidence. Appeals are made to the Employment Appeal Tribunal and are strictly limited to legal issues, not factual disagreement. Clear and properly structured appeal grounds are essential for a valid challenge.
