Without Prejudice Discussions: A Complete UK Guide

A without prejudice discussion is a conversation or written exchange, made in a genuine attempt to settle an existing dispute, that generally cannot later be shown to a court or employment tribunal as evidence. The rule lets two sides speak frankly, make concessions and explore a deal without the worry that an admission (“we may have got the process wrong”) will be used against them if the talks fail. In the UK it comes from two overlapping sources: the long-standing common law without prejudice rule, which needs a genuine existing dispute, and the narrower statutory protected conversations regime in section 111A of the Employment Rights Act 1996, which applies to ordinary unfair dismissal even where no dispute exists yet.

Used correctly, the protection is a powerful way to open settlement talks, agree an exit or resolve a workplace problem quietly. Used carelessly — the wrong label on the wrong conversation, or behaviour that crosses the line into bullying — and the “protection” evaporates, leaving every word admissible. This guide explains exactly how both rules work in 2026, where each applies, the exceptions that strip the privilege away, and how to run a protected conversation so it stays protected.

What “without prejudice” actually means

“Without prejudice” is a rule of evidence rooted in public policy. The courts want people to settle their differences rather than litigate, so the law encourages frank settlement discussions by promising that what is said in them will not later be used as an admission. If an employer says in a settlement meeting, “look, our investigation was rushed and we would rather pay you to leave on good terms,” that concession cannot normally be produced at a tribunal to prove the dismissal was unfair. The same applies to written offers and counter-offers exchanged to resolve a dispute.

The protection attaches to the purpose and content of the communication, not merely to a label. A letter headed “without prejudice” that contains no genuine attempt to settle anything is not protected; equally, a meeting that was plainly a settlement negotiation can be protected even if nobody used the magic words. That said, marking genuine settlement correspondence clearly remains good practice, because it signals intent and avoids arguments later about what the communication was for.

Crucially, the rule is about admissibility as evidence, not secrecy in the broad sense. It stops privileged communications being put before a tribunal to prove the merits of a claim. It does not, by itself, prevent the parties from referring to the fact that negotiations happened, nor does it override separate duties of confidentiality that the parties may agree contractually.

Two different protections, compared

Employers and employees frequently confuse the common law without prejudice rule with the statutory protected conversation under section 111A of the Employment Rights Act 1996. They overlap but are not the same, and the differences decide whether a conversation is safe.

The practical lesson is that section 111A is narrower than people assume. It is useful precisely because it works without an existing dispute, but it only shields ordinary unfair dismissal. If there is any realistic prospect of a discrimination or whistleblowing allegation, an employer cannot rely on s.111A alone — it needs a genuine dispute so the broader common law rule applies, or it must accept that the conversation could be referred to in those claims.

When the without prejudice rule applies

Three conditions generally need to be met for the common law rule to bite. First, there must be a genuine dispute between the parties. This does not require a tribunal claim to have been issued — a grievance, a clear disagreement over a dismissal, or a threatened claim will usually do — but there must be something to settle. Second, the communication must be a genuine attempt to settle that dispute, whether an offer, a response or negotiation around terms. Third, the protection only covers the negotiation content; surrounding operational correspondence is not swept up just because it sits in the same email chain.

Where there is no dispute at all — for example, an employer who simply decides it would like a long-serving employee to leave, with no performance issue, grievance or disagreement on the table — the common law rule has nothing to attach to. This is exactly the gap that section 111A was designed to fill in unfair dismissal cases. Outside that gap, an employer opening “without prejudice” talks where no dispute exists may find the conversation is fully admissible.

The rule applies to oral discussions as much as written ones. A settlement meeting is protected on the same principles as a settlement letter. Because oral discussions are harder to prove after the event, it is sensible to confirm in writing — on a without prejudice basis — what was discussed and offered, so both sides have a clear record.

Protected conversations under section 111A

Section 111A was introduced to let employers raise the possibility of an agreed exit without an existing dispute, and without the conversation being used against them in a later ordinary unfair dismissal claim. The statute refers to “pre-termination negotiations” — any offer made or discussions held, before employment ends, with a view to it ending on agreed terms. Where the section applies, evidence of those negotiations is inadmissible in proceedings for ordinary unfair dismissal.

The limits are important and often misunderstood:

• Only ordinary unfair dismissal. The shield does not extend to discrimination under the Equality Act 2010, whistleblowing detriment, automatically unfair dismissal (for example, dismissal for asserting a statutory right or for trade union reasons), or breach of contract and wrongful dismissal claims. In those cases the conversation may be admissible.
• The improper behaviour exception. If, in the tribunal’s view, the employer behaved improperly during the negotiations, the protection can be lifted to the extent the tribunal considers just.
• It is not a substitute for a fair process. A protected conversation does not make a dismissal fair. If the employee rejects the offer and is later dismissed, the employer still needs a fair reason and a fair procedure.

Because of those gaps, many employers run pre-termination talks on a “belt and braces” basis — relying on s.111A for the unfair dismissal angle while also trying to ensure a genuine dispute exists so the common law rule can cover the wider claims. Where the facts are sensitive, taking advice before the first conversation is far cheaper than arguing about admissibility at a hearing.

When the protection falls away

Neither rule is absolute. The common law without prejudice rule can be displaced in a limited set of situations, the best known being “unambiguous impropriety” — where the privilege is being abused to cloak something like blackmail, perjury or a clear threat. The courts set this bar high: it is not enough that a party said something unwise or overstated its case. Other recognised exceptions include using the communications to show whether a settlement was actually reached, to explain delay, or to resist a claim of estoppel.

Under section 111A, the equivalent gateway is “improper behaviour”, which is broader than unambiguous impropriety. The Acas guidance gives examples, and tribunals treat the following as capable of being improper:

Where improper behaviour is found, the tribunal does not have to admit everything — it admits the evidence “to the extent it considers just.” But once a conversation is tainted, the employer loses the certainty the rule was meant to provide. The safest course is to keep the tone genuinely consultative, give realistic time to consider, and avoid any language suggesting the decision has already been made.

“Without prejudice save as to costs” offers

A variant worth knowing is the offer made “without prejudice save as to costs”, often called a Calderbank offer. The negotiation stays privileged on the merits, but the offer can be shown to the court or tribunal after the decision, on the question of costs. The idea is to put pressure on the other side: reject a reasonable offer, do no better at the hearing, and you may face a costs argument.

In the employment tribunal this has less bite than in the civil courts, because tribunals generally do not award costs as a matter of course — each side usually bears its own costs unless a party has behaved unreasonably or brought a hopeless claim. Even so, a well-judged “save as to costs” offer can influence how a tribunal views the parties’ conduct, and it is a standard tool in commercial disputes where costs ordinarily follow the event. Labelling matters here: an ordinary “without prejudice” offer cannot be shown on costs, so the precise wording changes what the document can later be used for.

How to hold a without prejudice or protected conversation properly

Whether you are an employer opening exit talks or an employee responding to an offer, a disciplined approach keeps the protection intact and the negotiation productive.

For employers

• Decide which rule you are relying on. Is there a genuine dispute (common law) or are you opening pre-termination talks with no dispute (s.111A)? If discrimination or whistleblowing is in play, s.111A will not protect you.
• Set the conversation up clearly. Explain that you would like to have a protected/without prejudice conversation, and that the employee can take time and advice.
• Make a clear written offer and give a realistic period to consider it — Acas guidance points to a minimum of 10 calendar days for a written settlement proposal.
• Avoid pressure language. Do not say or imply that dismissal is inevitable, and do not impose an unreasonably tight deadline.
• Document on a without prejudice basis, and remember any agreed exit normally needs a valid settlement agreement with independent advice for the employee.

For employees

• You do not have to respond immediately. Take the time offered and get advice before agreeing anything.
• Keep your own note of what was said, especially if you feel pressured or if discriminatory comments were made — that evidence may be admissible despite the “protection.”
• Understand what you would be giving up. A settlement usually waives most claims; some claims (such as accrued pension rights or unknown personal injury) typically cannot be signed away.
• Consider the alternatives — a grievance, mediation, or pursuing a claim — before accepting.

Common mistakes to avoid

• Thinking the label is magic. Writing “without prejudice” on a letter does nothing if there is no genuine dispute and no genuine attempt to settle.
• Relying on s.111A against discrimination or whistleblowing. It only covers ordinary unfair dismissal; those other claims see straight through it.
• Applying undue pressure. Short deadlines, “accept or be dismissed,” and intimidation can be improper behaviour and lift the protection.
• Mixing privileged and open correspondence. Burying a settlement offer in an otherwise operational email muddies what is protected; keep settlement communications separate and clearly marked.
• Forgetting the settlement agreement formalities. An agreed exit normally needs a written settlement agreement and independent advice for the employee to validly waive statutory claims.
• Assuming “without prejudice” means confidential. It is an evidence rule, not a confidentiality clause — secrecy obligations must be agreed separately.

Confidentiality, NDAs and the 2025 reforms

Without prejudice protection is often confused with the confidentiality clauses (sometimes called non-disclosure agreements or NDAs) that appear in settlement agreements. They do different jobs: the without prejudice rule keeps negotiation content out of evidence, while a confidentiality clause is a contractual promise about what the parties may say afterwards.

This distinction matters more than ever following reform of confidentiality provisions. Measures in the Employment Rights Act 2025 are designed to render void any confidentiality or non-disclosure terms that seek to prevent a worker from speaking out about harassment or discrimination. In practice that means a settlement agreement cannot lawfully be used to silence someone about unlawful conduct, even though the underlying settlement negotiations remain privileged as evidence. Employers drafting settlement terms in 2026 should review their confidentiality wording so it does not fall foul of the new rules, and employees should understand that signing a deal does not strip away their ability to report wrongdoing. Always check the latest position at GOV.UK, as commencement dates and detailed regulations are being phased in.

For the negotiation stage itself, the without prejudice and s.111A rules are unchanged by these reforms — they continue to govern what can be put in front of a tribunal. The reforms bite on the contractual confidentiality that follows a deal, not on the evidential privilege that protects the talks.

Getting the wording right: “without prejudice” vs “subject to contract”

Three labels are routinely muddled, and each does a different job. Without prejudice governs admissibility — it keeps genuine settlement content out of evidence. Subject to contract governs whether a binding agreement has yet been formed — it signals that, however far the negotiation has gone, neither side is bound until a formal agreement is signed. Without prejudice save as to costs sits between the two: privileged on the merits, but disclosable on costs after judgment.

In employment settlements it is common to mark correspondence both “without prejudice” and “subject to contract” so that the talks are protected from evidence and nobody is accidentally locked into a half-finished deal. The wording is not a mere formality: a court will look at substance, but clear and accurate labelling reduces the risk of an expensive argument about what a document was, what it protects, and whether a binding settlement was reached before the paperwork was complete. Reusing a heading out of habit — for instance marking an open, operational letter “without prejudice” — creates confusion and can undermine a later privilege argument.

What happens if the talks fail

If a without prejudice negotiation does not produce a deal, the protection still holds: neither side can generally rely on the failed offers or admissions as evidence of the merits. The parties are returned to where they started, free to pursue the dispute through the normal channels. For an employee that may mean raising or continuing a grievance, attempting mediation, or progressing a claim through Acas early conciliation and, ultimately, an employment tribunal.

For an employer, a failed protected conversation is not the end of the road, but it is a reminder that section 111A does not make a dismissal fair. If the employer still wishes to dismiss, it must follow a fair process with a fair reason — the earlier offer cannot substitute for proper procedure, and cannot be waved in front of the tribunal to suggest the employee was being unreasonable. Keeping a clean separation between the privileged settlement track and the open, procedural track is the single most useful discipline in getting either route right.

This article is for general information only and does not constitute legal or accountancy advice. Hayhills Limited, trading as Hayhills Legal Advisory, provides non-reserved legal advisory services. Always check current requirements at GOV.UK.

Frequently asked questions

What does “without prejudice” mean in plain English?

It is a rule of evidence. Genuine settlement communications about an existing dispute cannot normally be shown to a court or tribunal as evidence of admissions. It lets both sides negotiate frankly without their concessions being used against them if the talks fail.

Do I have to write “without prejudice” for the protection to apply?

No. Protection depends on whether the communication was a genuine attempt to settle a genuine dispute, not on the label. However, marking real settlement correspondence clearly is good practice because it signals intent and avoids later arguments about the purpose of the communication.

What is a protected conversation under section 111A?

It is a statutory protection allowing an employer to discuss an agreed exit before any dispute exists, without that conversation being used in a later ordinary unfair dismissal claim. It is narrower than the common law rule and only covers ordinary unfair dismissal.

What is the difference between without prejudice and section 111A?

The without prejudice rule needs a genuine existing dispute but protects against a broad range of claims. Section 111A needs no dispute but only protects against ordinary unfair dismissal — not discrimination, whistleblowing, automatically unfair dismissal or breach of contract.

Does section 111A protect against discrimination claims?

No. Section 111A is limited to ordinary unfair dismissal. If an employee alleges discrimination, or that discriminatory comments were made in the conversation, that evidence can be admissible despite the “protected” label.

When does without prejudice protection get lost?

At common law, where there is “unambiguous impropriety” — an abuse such as blackmail or a clear threat. Under section 111A, where there is “improper behaviour” such as bullying, undue pressure, an unreasonably short deadline, or telling the employee they will be dismissed anyway.

How long should an employee get to consider a settlement offer?

Acas guidance suggests a minimum of 10 calendar days to consider a written settlement proposal and to take independent advice. Imposing an unreasonably short deadline can amount to improper behaviour and may strip away the section 111A protection.

Is “without prejudice” the same as confidential?

No. Without prejudice is an evidence rule that keeps negotiation content out of a hearing. Confidentiality — what the parties may say afterwards — is a separate contractual matter, usually dealt with by a confidentiality clause in a settlement agreement.

What is a “without prejudice save as to costs” offer?

It is an offer that stays privileged on the merits but can be revealed to the court or tribunal after the decision, on the question of costs (a Calderbank offer). It has less force in tribunals, where each side generally bears its own costs, but can still influence how conduct is viewed.

Do the 2025 reforms change without prejudice rules?

The Employment Rights Act 2025 reforms target contractual confidentiality — rendering void NDA-style clauses that silence workers about harassment or discrimination. They do not change the evidential without prejudice or section 111A rules that govern what can be put before a tribunal. Check GOV.UK for commencement details.