Prison Officer Unfair Dismissal Tribunal: Time Limits 2026

In shortThis covers claims by prison staff in England, Wales and Scotland; three Employment Rights Act 2025 changes matter in 2026 and 2027, and it is general information, not legal advice.

This guide covers claims by prison officers and other directly employed prison staff in England, Wales and Scotland, where the law is the same in principle. Northern Ireland has a separate tribunal system with different procedures, and GOV.UK says its employment tribunal guide covers England, Scotland and Wales only.

Part X of the Employment Rights Act 1996 applies to Crown employment, with modifications, and prison officers have brought and lost such claims, as the published judgments show. For the steps before a claim, see appealing a disciplinary outcome and what happens after dismissal.

In shortThe tribunal asks whether the employer acted as a reasonable employer could, not whether you were guilty; it does not rehear the disciplinary case.

The employer must show the reason for the dismissal and that it is a potentially fair reason. Conduct is one of them (section 98(2)(b) of the Employment Rights Act 1996). The tribunal then decides, under section 98(4), whether the employer acted reasonably or unreasonably in treating it as a sufficient reason for dismissal.

The tribunal takes account of the circumstances including the employer's size and administrative resources and in accordance with equity and the substantial merits of the case.

For conduct cases the starting point is the well-known Burchell test, which both published HMPPS judgments applied. Alongside it the tribunal asks whether dismissal was within the range of reasonable responses, whether the procedure was fair taking account of the Acas Code, and whether the employer treated like cases consistently.

• Did the employer genuinely believe the employee was guilty of the misconduct?
• Did it have reasonable grounds for that belief?
• Had it carried out as much investigation as was reasonable at the time it formed that belief?

In shortYou need two years' service now, six months for dismissals with an effective date of termination on or after 1 January 2027, and some claims need none.

• Now2 yearsSection 108(1), Employment Rights Act 1996
• From 1 January 20276 monthsSI 2026/559, regulation 4; compensatory cap removed
• Key dateEDTThe effective date of termination, not the date of the letter

SI 2026/559, made on 26 May 2026 and in force on 1 January 2027, brings the Employment Rights Act 2025 changes into effect: the qualifying period is reduced to six months and the compensatory award cap is removed.

The Government's 25 September 2026 timeline update confirms 'reduction of unfair dismissal qualifying period to 6 months, for dismissals from 1 January 2027, and uncapping compensatory awards' and notes future dates remain subject to parliamentary process.

The transitional rule is in regulation 4. If someone is dismissed before 1 January 2027 but the effective date of termination (EDT) falls on or after that date, the amendments apply. If the EDT is before 1 January 2027, they do not.

In shortUsually 6 months from when employment ended, after compulsory Acas notification that pauses the clock; internal processes do not stop it, and interim relief has a 7-day clock.

GOV.UK says you usually have to make a claim within 6 months of your employment ending or the problem happening. For unfair dismissal the clock runs from when employment ended.

The Government's timeline update confirms the change from 3 to 6 months took effect on 1 October 2026, except for breach of contract claims in Scottish tribunals, where it takes effect on 9 November 2026.

We have not been able to verify how the old and new limits interact for events before 1 October 2026, so if your dismissal or other event is recent and near the old three-month limit, do not assume more time. Take advice immediately.

1. Tell Acas before you make a claim: GOV.UK says that 'before you make a claim to an employment tribunal, you must tell Acas'. The notification is compulsory, though taking part in conciliation is voluntary.
2. The time limit is put on hold while Acas helps you try to resolve the dispute. Acas cannot represent you, take sides or give legal advice.
3. When the early conciliation certificate is issued, Acas's rules leave at least one month to file. Check the dates on your own certificate and do not leave it late.
4. Present your claim to the tribunal within time.

In shortBoth published HMPPS claims, Belmarsh and Moorland, failed despite delay and policy breaches; they show what 'range of reasonable responses' means but are not a forecast.

Belmarsh (Dixon and Smith)

Two officers dismissed for gross misconduct in December 2022 after a finding that they assaulted a prisoner brought claims heard in December 2023 by Employment Judge Richter at Croydon, both appearing in person. They said the investigation and process were unfair and tainted by irregularities. The conduct allegation was assault of a prisoner, explained in gross misconduct examples. The tribunal found the investigation and process reasonable overall and dismissal within the range of reasonable responses. The claims failed.

Moorland (Hayes)

An officer dismissed on 6 May 2025 presented a claim on 16 May 2025 after early conciliation. The case was relisted from a one-day to a three-day hearing, with an agreed bundle of 828 pages, and was heard by video on 22 to 24 July 2026 by Employment Judge Ayre, with the officer representing herself and supported by a friend and the Secretary of State represented by counsel. The judgment, dated 21 August 2026 and published on 29 September 2026, found genuine belief, reasonable grounds, a reasonable investigation despite delay, a fair procedure and a sanction within the range. The tribunal also tested inconsistency: it compared two other officers' cases and found a clear and rational basis for different treatment. The claim failed.

• What the Belmarsh tribunal considered: the role of a manager who had attended the scene, an unconcluded management enquiry not disclosed until the tribunal, a suspension authorised by the wrong grade and reviewed late, missing CCTV, alleged collusion, the way a co-accused's changed account was handled, consistency with other officers' conduct, and the hearing itself.
• Timing in Moorland: from claim to judgment took about 15 months.
• Adjustments: both judges made adjustments for claimants' health or learning needs, including additional breaks and extra reading time, with reference to the Equal Treatment Bench Book.

In shortCompensation is the main remedy and the statutory cap is lifted from 1 January 2027; the Acas Code can move awards by up to 25%, and many claims settle.

If a tribunal finds a dismissal unfair, the main remedy is compensation. Reinstatement or re-engagement can be ordered but are less common, and a tribunal can reduce an award for various reasons, which a solicitor can explain on your facts.

Until the changes take effect, a statutory cap limits compensatory awards. We have not verified the current cap figure and it changes with rules updated each April, so check GOV.UK or ask a solicitor for the figure in force on the date of your dismissal.

From 1 January 2027, the Government timeline update says compensatory awards are uncapped for dismissals from that date.

In shortDiscrimination, whistleblowing and contract claims can sit alongside unfair dismissal, with different time limits and no qualifying service requirement.

Not every case is only about unfairness. GOV.UK lists unfair dismissal, discrimination, contract breaches and unauthorised pay deductions among the types of claim a tribunal hears and says discrimination claims run six months from the incident.

• Discrimination under the Equality Act 2010, for example where the employer failed to consider a disability
• Whistleblowing detriment, or dismissal where the officer raised concerns
• Breach of contract, for example notice pay

In shortThe POA Legal Advice Scheme, Acas, Citizens Advice and employment solicitors are the main sources of help; gather your documents and a one-page timeline first.

The POA says its Legal Advice Scheme provides full legal assistance and representation on any work-related matter, including disciplinary hearings and inquiries, and free initial legal advice on any work matter.

Members must read the relevant legal handbook, agree its terms and submit an application, and the Legal Aid Committee approves applications and may impose conditions.

Whether and how a given tribunal claim is supported is for the POA to confirm, and there is a rule that no initial advice or assistance is given for proceedings started or under investigation before you joined. See POA representation in disciplinary cases.

• Acas (which can conciliate but not represent you)
• Citizens Advice
• A solicitor with employment law experience
• Legal expenses cover on a home insurance policy
• For some, a law centre

In shortWork through these eight steps with a solicitor or representative, starting with your effective date of termination and a conservative deadline.

Use this as a prompt for the conversation you have with a solicitor or representative, not as a substitute for it.

1. Confirm your effective date of termination in writing, and your continuous service on that date.
2. Check whether you qualify under the 2-year rule or, for dismissals taking effect on or after 1 January 2027, the 6-month rule, or whether a no-qualifying-period reason such as whistleblowing might apply.
3. Work out the tribunal deadline conservatively, remembering the 6-month limit applies from 1 October 2026 and the position for earlier events is unresolved.
4. Decide when to notify Acas. Early conciliation pauses the clock and is compulsory before a claim.
5. List your real arguments by reference to the Burchell questions: reason, belief, grounds, investigation, procedure, sanction, consistency.
6. Identify evidence: the investigation report, hearing record, appeal outcome, comparators, medical evidence and any documents the employer has not disclosed.
7. Think about realistic outcomes, including settlement, the impact of the compensation cap before 1 January 2027, and the time a case can take (about 15 months in the Moorland case).
8. Look after your health. If you need adjustments to take part, ask for them in writing with medical evidence.