Without prejudice material The rule regarding any material marked ‘without prejudice, save as to costs’ applies to exclude all negotiations genuinely aimed at a settlement, whether oral or in writing, from being given in evidence or, indeed, as part of the pleadings. Therefore, if such material is inadvertently referred to in the pleadings, the pleading party may amend the same so that the references are removed and are not placed before the court. Privilege The privilege over without prejudice material belongs to both parties and can only be waived if both parties agree to it. If one party unilaterally pleads to or discloses such material, in the absence of an amendment, the other party may choose to either apply to strike out the offending material or to treat it as a waiver of privilege