Can I win my appeal at work without going to an Employment Tribunal?

Yes. Many disciplinary appeals succeed at internal review stage because the employer has not followed the ACAS Code procedure correctly or the original sanction is disproportionate. The internal appeal is the cheapest and fastest route, and a successful appeal can result in the sanction being reduced or overturned entirely. If the internal appeal fails, you can still bring a claim to the Employment Tribunal, but you must first notify ACAS for Early Conciliation. The 3-month time limit (less 1 day) for unfair dismissal starts from the date of the act complained of (e.g. dismissal) and continues to run while internal procedures play out.

What are the strongest grounds for a disciplinary appeal?

The five strongest grounds are: (1) procedural defect — the employer failed to follow the ACAS Code at the original hearing; (2) inconsistent sanction — colleagues who committed the same misconduct were treated less harshly; (3) new evidence — evidence that was not available at the original hearing now exists; (4) disparity of treatment — the sanction discriminates under the Equality Act 2010 or there is otherwise inconsistent treatment by protected characteristic; (5) bias or an unfair investigation — the decision-maker was not impartial or the investigation failed to hear your side. The strongest appeals combine procedural defect with one of the substantive grounds.

What happens after I send the appeal letter?

ACAS Code paragraph 33(b) requires the employer to hear the appeal without unreasonable delay, chaired by a manager who is more senior than (and was not involved in) the original decision. The employer should give you advance written notice of the appeal hearing, the right to be accompanied, and written reasons for the appeal outcome. If the appeal is successful, the original sanction is reduced or overturned; if it is unsuccessful, you must notify ACAS for Early Conciliation before bringing a claim to the Employment Tribunal.

How to Appeal a Disciplinary Outcome in the UK (ACAS Code & ERA 1996 s.207A)

Q: How long do I have to appeal a disciplinary outcome in the UK?

Under paragraph 33(b) of the ACAS Code of Practice on Disciplinary and Grievance Procedures, an employer should give an employee a right of appeal against any disciplinary outcome, and the appeal should be heard without unreasonable delay. While the ACAS Code itself does not fix a calendar deadline, most employer policies require the appeal to be submitted within 5 working days of receipt of the disciplinary outcome letter. If your employer's policy is silent on the deadline, raise the appeal in writing immediately and refer back to ACAS Code paragraph 33(b) and paragraph 34 in support.

Q: What is the Employment Rights Act 1996 section 207A uplift?

Section 207A of the Employment Rights Act 1996 (as amended by the Tribunals and Enforcement Act 2007) gives Employment Tribunals the power to increase any award by up to 25% where an employer has unreasonably failed to follow the ACAS Code of Practice on Disciplinary and Grievance Procedures, and to decrease any award by up to 25% where an employee has unreasonably failed to follow the Code. In practice this uplift is the main financial lever when an employer has bungled the disciplinary process but the underlying dismissal is not otherwise automatically unfair.

If you have just received a written warning, final warning, or dismissal, the right next move is a formal appeal letter under paragraph 33 of the ACAS Code of Practice on Disciplinary and Grievance Procedures. Get the appeal stage right, and the sanction can be overturned before any Employment Tribunal claim becomes necessary.

⏱

Key deadline: under ACAS Code paragraph 33(b), you have the right to appeal any disciplinary outcome. Most employer policies require the appeal to be submitted within 5 working days of receipt of the written outcome; anything beyond that is at the employer's discretion and is treated as out of time.

Free UK legal templates

Used by 500+ tenants, consumers & employees

No sign-up required

What the Law Says

ACAS Code of Practice paragraphs 33–36

The ACAS Code of Practice on Disciplinary and Grievance Procedures applies to every UK workplace. Paragraph 33(b) gives every employee the right to appeal any disciplinary sanction — including written warnings, final warnings, demotion, and dismissal — and 33(c) gives the right to be accompanied at both the original hearing and the appeal. Paragraph 33(d) requires the appeal to be heard without unreasonable delay by a manager who is more senior than, and was not involved in, the original decision. Paragraphs 34–36 set out the conduct of the appeal hearing and the requirement to give written reasons for the appeal outcome.

Employment Rights Act 1996 s.207A

Section 207A of the Employment Rights Act 1996 (inserted by the Tribunals and Enforcement Act 2007) gives Employment Tribunals the power to increase an award of compensation by up to 25% where the employer has unreasonably failed to follow any provision of the ACAS Code, and to decrease the award by up to 25% where the employee has unreasonably failed to do so. In an unfair dismissal claim where the substantive decision is borderline but the procedure was bungled, the 25% uplift is often where the financial outcome turns.

The disciplinary appeal is the most cost-effective stage in the entire process. A successful appeal can result in the sanction being downgraded (a final warning reduced to a written warning), reversed (re-instatement or re-engagement), or compensation paid. If the appeal is mishandled by the employer, the s.207A uplift compounds the financial risk on top of any underlying unfair dismissal claim.

The mechanistic test is straightforward: was the employer's original decision procedurally fair under the ACAS Code, and is the sanction reasonable in the circumstances? If either answer is no, you have grounds. The appeal letter does the heavy lifting on both points — specifying the procedural defect and the substantive ground for disagreement.

When You Have a Valid Appeal

You have grounds to appeal when any one of the following applies:

Procedural defect at the original hearing. You were not given adequate notice of the allegations, were not allowed to call witnesses, were refused the right to be accompanied under section 10 of the Employment Relations Act 1999, were not given the minutes of the meeting, or the investigator was also the decision-maker in breach of ACAS paragraph 28.
Inconsistent sanction. Colleagues who committed the same misconduct (or worse) were not disciplined, or received a lesser sanction. Disparate treatment is one of the strongest grounds and turns on the employer's own disciplinary records.
New evidence has come to light. CCTV footage, an email, a witness statement, or a contemporaneous note that was not before the original hearing can change the outcome. The appeal is your chance to introduce it.
Disparity / unlawful discrimination. You were treated less favourably than a comparator in similar circumstances because of a protected characteristic under the Equality Act 2010 (age, disability, race, religion or belief, sex, sexual orientation, gender reassignment, marriage and civil partnership, pregnancy and maternity).
Bias or unfair investigation. The decision-maker had an obvious conflict of interest (was the complainant, had previously raised concerns about you, had a close personal relationship with the complainant) or the investigation failed to interview key witnesses or consider exculpatory evidence.
The sanction is unreasonable. The sanction falls outside the range of reasonable responses for the misconduct in question. Dismissal for a first offence of minor misconduct, or a final warning for an isolated incident of gross misconduct that the employer cannot prove, are both examples of unreasonable outcomes.

What Your Letter Should Include

Disciplinary Appeal Letter Checklist (ACAS Code & ERA 1996 s.207A)

Your full name, job title, department, and date of joining
Date and reference of the disciplinary outcome letter you are appealing
The sanction being appealed (written warning / final warning / dismissal / demotion)
The date you received the outcome — this starts the 5 working day appeal clock under most employer policies
The grounds of appeal: procedural defect / inconsistent sanction / new evidence / disparity / bias
Explicit reference to ACAS Code paragraph 33(b) (right of appeal) and paragraph 33(c) (right to be accompanied)
Explicit reference to Employment Rights Act 1996 s.207A on the 25% uplift for non-compliance with the ACAS Code
Request that the appeal hearing be chaired by a more senior manager not involved in the original decision (ACAS paragraph 33(d))
Confirmation that you will be accompanied by [TRADE UNION REPRESENTATIVE / COLLEAGUE NAME] under section 10 of the Employment Relations Act 1999
A request for any documents, notes, or witness statements to be disclosed in advance of the appeal hearing
A modelled response deadline of 5 working days from receipt for the employer to confirm the appeal hearing date
Statement that you will notify ACAS for Early Conciliation if the internal appeal fails — this is the statutory prerequisite to an Employment Tribunal claim

Ready to send your disciplinary appeal? LetterLift generates a formal appeal letter citing ACAS Code paragraph 33 and the Employment Rights Act 1996 s.207A uplift provision — branching automatically on the strongest appeal ground (procedural defect, inconsistent sanction, new evidence, or disparity of treatment). Personalised to your situation.

Write Your Letter — £2.99

Takes 90 seconds. No account needed.

Key tip: Send the appeal letter by Royal Mail Signed For AND email with read receipt, timestamped and dated. The 5 working day clock from receipt of the original sanction runs separately from the modelled 5-day response window in your appeal letter — the latter is what triggers the appeal hearing date. Keep a copy of the letter, the recorded delivery tracking reference, and the read receipt email. If you are dismissed at the end of the disciplinary process and do not have 2 years' continuous service, you may still have a discrimination or whistleblowing claim — the appeal letter preserves your position on both.

What Happens If The Appeal Fails

If your employer's appeal panel upholds the original outcome, or your appeal is mishandled, you have clear escalation options:

Confirm appeal outcome in writing with the panel's reasons

Under ACAS Code paragraph 35, the employer must give you a written decision on your appeal, setting out the facts relied on. Preserve this — it is the document the Employment Tribunal will look at first if you later bring a claim. Pay close attention to whether panel members were impartial, whether your new evidence was actually considered, and whether the same grounds were addressed.

Notify ACAS for Early Conciliation

Before submitting any claim to the Employment Tribunal, you must notify ACAS and attempt Early Conciliation. This is free, confidential, and statutory. A conciliator will contact your employer to explore settlement. If conciliation fails (or the employer does not respond), ACAS issues an Early Conciliation certificate allowing you to proceed to the Tribunal. This is a strict prerequisite — you cannot skip it.

Submit Employment Tribunal claim within 3 months

Time runs from the date of the act complained of (usually the date of the original sanction or dismissal). For unfair dismissal you generally need 2 years' continuous service; for discrimination claims under the Equality Act 2010 there is no qualifying service, and the time limit is the same 3 months minus 1 day. Your compensation can include a 25% uplift under ERA 1996 s.207A where the employer unreasonably failed to follow the ACAS Code — a separate, standalone financial lever that runs alongside the unfair dismissal claim.

If the appeal never happened, claim 25% uplift on top

Where the employer refused to hear an appeal entirely, or the appeal was chaired by the same manager who made the original decision in breach of ACAS paragraph 33(d), the failure to follow the ACAS Code is plain. The s.207A uplift then runs through the entire Tribunal award, often turning a borderline hostile dismissal into a substantial financial outcome. This is the single most under-used lever in the disciplinary process — many employees do not realise that procedural failure on its own is compensable.

Important: if the disciplinary process involved an unlawful deduction of wages, a holiday pay underpayment, or a breach of contract, raise those claims concurrently in the same Employment Tribunal submission. A successful disciplinary appeal may result in re-instatement, re-engagement, or compensation in lieu — if you are unsure which you should ask for, request them all and let the Tribunal decide. Pay close attention to whether there are protected disclosures being made or whistleblowing activity in the background, because a Data Subject Access Request (DSAR) alongside the appeal can also act as evidence-gathering.

How it works

Choose your letter type

Select the issue that matches your situation from our library of UK legal letter templates.

Customise with your details

Answer a few short questions. The letter is personalised to your case and cites the correct legislation.

Send to the other party

Download your letter and send it by email or post. Most disputes resolve after a single professional letter.

Need professional help?

Speak to a specialist employment solicitor

If your case is complex, involves discrimination, or you are facing an Employment Tribunal claim, we can connect you with a solicitor who specialises in unfair dismissal and disciplinary appeals.

Get matched with a solicitor → Free initial assessment

📥 Download your free UK disciplinary appeal letter template

Enter your email to instantly download a ready-to-use appeal letter that cites ACAS Code paragraph 33 and the Employment Rights Act 1996 s.207A uplift, and branches on procedural defect, inconsistent sanction, new evidence, or disparity of treatment.

Free download · No spam · Unsubscribe anytime.

Get your disciplinary appeal letter now

Professional, ACAS Code paragraph 33 and Employment Rights Act 1996 s.207A compliant appeal letter — branching on the strongest appeal ground. Personalised to your situation. Ready to send in minutes.

Write Your Letter — £2.99

Takes 90 seconds. No account needed.

Frequently Asked Questions

Common questions about appealing a disciplinary outcome under the ACAS Code, the Employment Rights Act 1996 s.207A uplift, and what to do if your employer refuses to follow its own procedure.

How long do I have to appeal a disciplinary outcome?

Under paragraph 33(b) of the ACAS Code of Practice, your employer is required to give you a right of appeal, but the ACAS Code itself does not fix a calendar deadline. Most employer policies require the appeal to be submitted within 5 working days of receipt of the disciplinary outcome letter. If your employer's policy is silent on the deadline, raise the appeal immediately in writing and cite ACAS Code paragraph 33(b) and your employer's own grievance/disciplinary procedure in support. If you are past the 5 working days, raise the appeal anyway and explain the delay — many employers will still hear a late appeal out of time if the delay is minimal and justified.

Can a successful appeal result in re-instatement?

If the original sanction was dismissal, a successful appeal can result in re-instatement to your previous role, re-engagement on similar terms, or compensation in lieu. The panel at the appeal hearing has full power to substitute its own decision for the original decision — it can reduce a final warning to a written warning, withdraw a warning entirely, or, in the strongest cases, overturn the dismissal and offer re-instatement. The governing test at appeal is the same as at first instance: was the employer's decision reasonable in the circumstances, and was the procedure followed?

What if the appeal panel was the same manager who made the original decision?

ACAS Code paragraph 33(d) requires the appeal to be heard by a manager who is more senior than, and was not involved in, the original decision. If the appeal panel was the same manager, or included the manager who originally decided the disciplinary, the appeal process is itself procedurally unfair — one of the leading categories of case where Employment Tribunals apply the 25% uplift under section 207A of the Employment Rights Act 1996. Address this in the appeal outcome letter; it is one of the strongest standalone grounds for an uplift.

Do I have the right to be accompanied at the appeal hearing?

Yes. Under section 10 of the Employment Relations Act 1999, an employee has the statutory right to be accompanied at any disciplinary or grievance hearing (including the appeal) by a trade union representative or a work colleague. The companion may address the hearing to put your case, sum up, and respond on your behalf, but may not answer questions on your behalf without your agreement. Your employer should give reasonable paid time off to your companion (employed by the same employer) to prepare and attend.

What is the Employment Rights Act 1996 s.207A uplift?

Section 207A of the Employment Rights Act 1996 gives Employment Tribunals the power to increase any compensation award by up to 25% where an employer has unreasonably failed to follow any provision of the ACAS Code on Disciplinary and Grievance Procedures, and to decrease any award by up to 25% where the employee has unreasonably failed to do so. It is the single most-underused lever in the disciplinary process: bureaucratic failure — wrong appeal chair, refusal to allow accompaniment, missing investigation notes — is on its own compensable, even if the underlying dismissal is borderline.

What happens if the employer ignores my appeal letter?

If the employer does not respond within the modelled 5 working day window, send a chase letter citing paragraph 33(b) of the ACAS Code again. If there is still no response, you can treat the disciplinary process as complete and bring a claim to the Employment Tribunal under the usual 3-month time limit. Notify ACAS for Early Conciliation first — this is a mandatory step and ACAS will issue a certificate if conciliation fails. The fact that the employer did not respond to the appeal is itself evidence of an unreasonable failure to follow the ACAS Code, and supports the s.207A uplift.