Prebble v Television New Zealand Ltd [1995] 1 AC 321

Richard Prebble, a New Zealand politician, sued Television New Zealand over allegations of improper conduct. The broadcaster sought to defend the claim using material that would question statements and conduct in parliamentary proceedings. That raised the protection reflected in Article 9 of the Bill of Rights. The litigation was stayed below because of concern that privilege would prevent a fair defence. Prebble appealed, and the Privy Council considered both the institutional nature of parliamentary privilege and whether exclusion of the protected material necessarily prevented the remaining dispute from being tried fairly.

Whether a defamation defendant could question parliamentary proceedings to defend the claim, and whether inability to use that material required the proceedings to be stayed.

The Privy Council confirmed that the parties could not impeach or question parliamentary proceedings in the defamation action. The claimant’s decision to sue did not waive an institutional privilege belonging to Parliament. Nevertheless, the action did not automatically have to be stayed. The principal allegations concerned conduct outside the House, and the claim could proceed subject to the evidential restriction unless fairness ultimately required a stay. The Board therefore distinguished the protected proceedings from external acts and rejected an indiscriminate approach to stopping the litigation. The judgment permits neither an individual waiver of privilege nor a blanket rule that anyone connected with parliamentary events is immune from ordinary defamation proceedings.

In the case of Prebble v Television New Zealand Ltd [1995] 1 AC 321, any court of place outside of Parliamentary walls cannot call into question or doubt the freedom of speech and debates or proceedings that take place within Parliament. It was held that the above would be seen as an impediment to Parliamentary privilege.

Prebble protects parliamentary proceedings from being impeached through litigation outside Parliament, even where a member begins the action. The privilege belongs to the institution and cannot simply be waived by an individual litigant. The court must nevertheless distinguish protected proceedings from alleged conduct outside them. A stay is a fairness measure where excluding privileged material makes a fair trial impossible, not an automatic consequence of any parliamentary reference. The case arose from New Zealand but addresses a principle central to UK constitutional study.