'Without Prejudice' UK: What It Means and When You Can Use It

"Without prejudice" is one of those phrases that appears frequently in legal correspondence but is often misunderstood — or incorrectly applied. Used properly, it creates a protected space for honest settlement discussions. Used incorrectly, the protection does not apply.

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What Does "Without Prejudice" Mean?

"Without prejudice" is a legal principle that protects genuine settlement negotiations from being used as evidence in court proceedings.

The underlying principle is that parties should be able to explore settlement without worrying that anything they say or offer will be used against them if the dispute does not settle. Without this protection, many settlements would never be reached.

In practice: If a letter is marked "without prejudice" and contains an offer to settle a genuine dispute, neither party can generally produce that letter in court proceedings — at least not to establish liability or the merits of their case.

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When Does the Protection Apply?

The protection applies when three conditions are met:

1. There is a genuine dispute — without prejudice only applies where there is a live legal dispute or one is reasonably contemplated. It does not apply to general correspondence or routine business communications.

2. The communication is a genuine attempt to settle — marking a letter "without prejudice" does not automatically create the protection. The content must be a genuine offer or counter-offer in settlement of the dispute.

3. The parties are negotiating — both sides must understand they are in settlement discussions.

Marking something "without prejudice" does not create the protection if the conditions are not met. Conversely, if the conditions are met, the protection may apply even if the words are not used.

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What Is Protected and What Is Not?

Protected (generally)

• Settlement offers and counter-offers
• Admissions made as part of a settlement proposal (e.g. "to resolve this matter, we accept we may have caused some confusion")
• Concessions made during without prejudice negotiations

Not Protected

• Statements made in "open" correspondence (not marked WP and not a settlement offer)
• Fraud, misrepresentation, or perjury committed during negotiations
• Terms of an agreed settlement — once a deal is reached, you need to be able to rely on it
• Correspondence where the WP label is just an attempt to avoid accountability (e.g. a letter making threats disguised as a settlement offer)

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"Without Prejudice Save as to Costs" (WPSATC)

This variant is important in litigation. A letter marked "without prejudice save as to costs" (WPSATC or "Calderbank offer") can be kept confidential during the main hearing — but can be shown to the judge after judgment when the court decides who pays costs.

The purpose is to encourage early settlement: if one party makes a reasonable WPSATC offer and the other refuses it but does no better at trial, the refusing party may face cost consequences.

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"Protected Conversations" in Employment

Employment law has a separate concept: the "protected conversation" under section 111A of the Employment Rights Act 1996 (introduced in 2013).

This allows employers and employees to have off the record discussions about ending the employment relationship — even where there is no existing dispute. The conversation is inadmissible in unfair dismissal proceedings (only).

Key differences from without prejudice:

	Without Prejudice	Protected Conversation (s.111A)
Requires pre-existing dispute	Yes	No
Applies to	All civil claims	Unfair dismissal only
Protects against improper pressure	No	Yes — employer cannot use improper pressure
Admissible in discrimination claims	Sometimes	Yes — not protected for discrimination/whistleblowing

If the employer uses improper pressure (threats, unreasonably short deadlines, misleading information), the protected conversation can be admitted as evidence.

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Practical Tips for Using "Without Prejudice"

1. Mark correspondence clearly — "Without Prejudice" at the top of the letter or email
2. Make sure there is a genuine dispute — without this, the protection may not apply
3. Keep WP and open correspondence separate — do not mix protected and unprotected content in the same letter
4. Do not use WP as a shield for threats or bad behaviour — courts will look at the substance
5. Document the agreed settlement in a separate, open letter — once terms are agreed, move to an open letter or formal agreement

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Key Takeaways

• "Without prejudice" protects genuine settlement negotiations from being used as evidence in court
• It applies when there is a genuine dispute and a genuine attempt to settle — not automatically just because the words are used
• "Without prejudice save as to costs" allows offers to be produced on costs after judgment
• In employment law, section 111A "protected conversations" allow pre-dispute termination discussions — but only protect against unfair dismissal claims, not discrimination
• If there is improper pressure, a protected conversation loses its protection