Gillan, R (on the application of) v. Commissioner of Police for the Metropolis & Anor

Factual and Procedural Background

The appeals arise from two separate stop-and-search incidents that occurred on 9 September 2003 outside an arms-fair at The City’s Docklands exhibition centre. The First Appellant, a postgraduate student who had travelled to the area to demonstrate peacefully, and the Second Appellant, a freelance journalist covering the protest, were each searched by uniformed police officers pursuant to an authorisation granted under sections 44-47 of the Terrorism Act 2000 (“the 2000 Act”). No incriminating items were found. Each Appellant was given a Form 5090 recording that the search had been conducted under section 44.

Both Appellants sought judicial review of (i) the underlying authorisation and its confirmation by the Secretary of State and (ii) the lawfulness of sections 44-47 themselves. The Queen’s Bench Divisional Court dismissed the claims, and the Court of Appeal dismissed the ensuing appeals. The present opinion is that of the final court of appeal, which was invited to address four principal grounds of challenge.

Legal Issues Presented

1. Whether the word “expedient” in section 44(3) should be construed to mean “necessary,” thereby restricting the circumstances in which an authorisation may lawfully be granted.
2. Whether the geographical breadth and repeated renewal of the relevant authorisation rendered it ultra vires or disproportionate.
3. Whether stops and searches carried out without reasonable suspicion under sections 44-45 violate Articles 5, 8, 10 or 11 of the European Convention on Human Rights (“ECHR”).
4. Whether the statutory scheme satisfies the Convention requirement that interferences be “in accordance with” or “prescribed by” law, particularly in light of potential discriminatory use.

Arguments of the Parties

Appellants’ Arguments

• “Expedient” must be read as “necessary,” relying on the principle of legality and a Home Office circular emphasising that powers should be authorised only when “absolutely necessary.”
• The 28-day, London-wide authorisation (and its continuous renewal) was excessive and unsupported by evidence of a specific threat outside central areas.
• Section 45 searches constituted a deprivation of liberty (Art. 5) and an unjustified interference with private life, expression and assembly (Arts. 8, 10, 11).
• The scheme lacked the accessibility and foreseeability required by the Convention because authorisations were secret and the discretion afforded to individual officers was too broad, facilitating arbitrary or discriminatory application.

Respondents’ Arguments

• Parliament deliberately chose “expedient,” which has a meaning distinct from “necessary.” Ten statutory and administrative safeguards sufficiently constrain the power.
• Evidence from a senior police officer and a Home Office official (supported by intelligence not disclosed for security reasons) justified both the geographic scope and the rolling renewals.
• Stops under section 45 amount only to brief restrictions on movement, not deprivations of liberty within Article 5, and any Article 8 interference is minimal and proportionate to the terrorist threat.
• The statutory text and publicly available Code A provide adequate legal certainty; improper searches are actionable in tort and judicial review offers a remedy for unlawful authorisations.

Table of Precedents Cited

Court's Reasoning and Analysis

1 – Statutory Construction. The House held that “expedient” in section 44(3) intentionally differs from “necessary.” Parliament balanced civil liberties against terrorism risks through a “series of constraints” (e.g. senior-officer authorisation, 28-day limit, Secretary of State confirmation, Code A compliance, and legal accountability for misuse). Therefore the ordinary meaning of “expedient” governs.

2 – Validity of the Authorisation. Unchallenged evidence from a senior police officer and a Home Office official, informed by classified intelligence, demonstrated a continuing threat across the entire metropolitan area. Given “relative institutional competence,” the courts accepted their assessment and found no basis to label the London-wide, rolling authorisations unlawful or disproportionate.

3 – Article 5. A routine stop-and-search causes only a temporary restriction, not a “deprivation of liberty.” Even if Article 5 were engaged, any detention would be justified as securing compliance with a legal obligation.

4 – Article 8 (and Articles 10 & 11). A superficial search may not always interfere with private life, but where it does, the interference pursues the legitimate aim of preventing terrorism and is proportionate if conducted strictly for that purpose.

5 – “Prescribed by Law.” The Court accepted that accessibility and foreseeability do not require advance publication of each authorisation, which would frustrate the measure. The Act, Code A and judicial remedies against abuse together provide sufficient legal certainty and safeguards.

6 – Alleged Discrimination. While acknowledging the risk of disproportionate impact on certain ethnic groups, the Court emphasised that officers must not rely solely on race; each decision must be based on individual judgment. Potential discriminatory misuse could be challenged in separate civil proceedings but was not established on the facts.

Holding and Implications

APPEALS DISMISSED.

The House of Lords upheld both the statutory scheme and the specific authorisation. Accordingly, police may continue to exercise stop-and-search powers under sections 44-47 without reasonable suspicion, provided all statutory and Code A safeguards are observed. The decision underscores that the scheme is Convention-compliant and places primary responsibility on operational policing to avoid discriminatory or arbitrary application. No new legal test was created, but the judgment clarifies the interpretation of “expedient,” the threshold for engaging Articles 5 and 8, and the requirements of legal certainty under the ECHR.