R v Home Secretary, ex p Northumbria Police Authority [1989] QB 26
Recognition of the British Parliament’s jurisdiction in permitting any action deemed necessary for the maintenance of the nation’s peace.
Facts
Public disturbances some years earlier resulted in the Home Office opting to create a stock of CS gas (commonly known as riot control gas) alongside a store of plastic crowd control batons, for easy access by the authorities in times of need. An internal circular memo stated that the Home Secretary would be authorised to give access to such stores where necessary, which the Northumbria Police Authority contested on the grounds that it amounted to the issuing of ultra vires powers to the Home Secretary, i.e. that they would be empowered to utilise powers beyond that which their position ought entail.
Issues
Was the Home Secretary empowered to supply the crowd control equipment in question as part of their greater prerogative of keeping peace within the realm.
Decision/Outcome
At first instance, the Court found for the claimant, with the view being held that prevention and management of threats to the peace did not require such strong Governmental intervention powers. This was overturned on appeal and it was subsequently recognised that Parliament held the prerogative power in determining the nation’s approach to disruption management, which it was entitled to delegate to the Home Secretary. Further, this prerogative should not be viewed as ‘surrendered’ simply because of ‘assent to the modern system of keeping the peace through the agency of independent police forces’ per Purchas LJ.
Updated 20 March 2026
This case summary remains broadly accurate as a description of the Court of Appeal’s decision in R v Secretary of State for the Home Department, ex parte Northumbria Police Authority [1989] QB 26. The case is still regularly cited in public law for the proposition that the Crown retains a prerogative power to keep the peace within the realm, and that this power was not abrogated by the Police Act 1964 (now largely replaced by the Police Act 1996). No subsequent legislation or case law has overruled the decision, and it remains good authority on the existence and scope of the royal prerogative in this context. However, readers should note a few points. First, the article’s framing that Parliament held the prerogative power is slightly misleading: the prerogative is a power of the Crown (exercised through ministers), not of Parliament. The Court of Appeal held that the Home Secretary could rely on both the Police Act 1964 and the royal prerogative; Purchas LJ’s reasoning concerned the Crown’s prerogative, not a parliamentary power. Second, the legislative landscape governing policing has changed significantly since 1989. The Police Act 1964 has been replaced principally by the Police Act 1996, and subsequent legislation including the Police Reform Act 2002, the Police Reform and Social Responsibility Act 2011, and the Policing and Crime Act 2017 has substantially reorganised police governance in England and Wales. The constitutional principle established in the case itself is unaffected by these changes, but students should consult the current statutory framework when considering the wider governance context.
