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South Lanarkshire Council v The Scottish Information Commissioner
Factual and Procedural Background
In May 2010, Requester asked Company A (a local authority) for statistical information showing how many employees in a particular post were positioned on ten specific spinal-column points of the pay scale. The stated aim was to examine possible gender bias in pay gradings. The request expressly excluded any employee names.
Company A initially rejected the ten requests as “vexatious” but withdrew that ground and subsequently refused disclosure on the basis that it would contravene the Data Protection Act 1998 (DPA). The matter was referred to the Commissioner, who investigated and on 17 March 2011 ordered disclosure. Company A appealed to the Inner House of the Court of Session, which dismissed the appeal. Company A then appealed to the Supreme Court.
Legal Issues Presented
- The correct interpretation and application of condition 6 in Schedule 2 to the DPA 1998, specifically the meaning of “necessary” where disclosure is said to serve the “legitimate interests” of the requester.
- Whether the Commissioner breached the requirements of natural justice by failing to provide Company A with copies of all correspondence exchanged with the Requester and two Members of Parliament during the investigation.
Arguments of the Parties
Appellant (Company A)
- The requested statistics constitute “personal data”; disclosure therefore engages the first data-protection principle and must be justified under condition 6.
- “Necessary” should be accorded its ordinary, restrictive meaning; the Commissioner wrongly applied a proportionality test.
- The Requester had no legitimate interest in the information, or any such interest could be satisfied by less intrusive means.
- By withholding investigative correspondence, the Commissioner deprived Company A of the opportunity to comment, breaching natural-justice requirements.
Respondent (Commissioner)
- The Requester’s pursuit of pay-equality information is a legitimate interest shared by the wider public.
- Disclosure of anonymised pay-point data is a proportionate and minimally intrusive method of advancing that interest and is therefore “necessary” within condition 6.
- The withheld correspondence contained nothing new or adverse to Company A; the statutory scheme did not oblige the Commissioner to share every exchange.
- The investigative process, viewed as a whole, satisfied the duty of fairness.
Table of Precedents Cited
| Precedent | Rule or Principle Cited For | Application by the Court |
|---|---|---|
| Common Services Agency v Scottish Information Commissioner [2008] UKHL 47 | FOISA does not override the safeguards in the DPA; no presumption in favour of disclosure of personal data. | Confirmed that freedom-of-information rights do not “trump” data-protection rights. |
| Corporate Officer of the House of Commons v Information Commissioner [2008] EWHC 1084 | “Necessary” in condition 6 embodies ECHR proportionality. | Cited as the authority underpinning the Commissioner’s proportionality approach. |
| Rechnungshof v Österreichischer Rundfunk (Joined Cases C-465/00 etc.) [2003] 3 CMLR 265 | Data-protection provisions must be interpreted in light of fundamental rights; proportionality where Article 8 ECHR is engaged. | Used to explain why the concept of “necessary” includes balancing of interests. |
| Huber v Bundesrepublik Deutschland (Case C-524/06) [2009] 1 CMLR 1360 | “Necessary” in Article 7(f) of Directive 95/46/EC has an autonomous EU meaning linked to proportionality. | Examined to assess whether a stricter necessity test applies; Court held it does not assist Company A. |
| Volker und Marcus Schecke & Eifert (Joined Cases C-92/09 & C-93/09) | Further EU guidance on proportionality in data publication. | Referenced to illustrate ongoing EU approach to balancing privacy and transparency. |
| R v Secretary of State for Employment, ex p Seymour-Smith (No 2) [2000] 1 WLR 435 | In EU law, “necessary” generally means “reasonably necessary”, not “absolutely necessary”. | Supported the Supreme Court’s interpretation of “necessary” in condition 6. |
| Chief Constable of West Yorkshire Police v Homer [2012] UKSC 15 | Proportionality in assessing necessity of measures impacting rights. | Provided domestic authority for a realist, proportional approach to “necessary”. |
| Glasgow City Council v Scottish Information Commissioner [2009] CSIH 73 | Scope of the Commissioner’s duty to act fairly and give notice of adverse material. | Formed the benchmark for evaluating alleged procedural unfairness. |
| R v Secretary of State for the Home Department, ex p Doody [1994] 1 AC 531 | Core principles of procedural fairness in administrative decision-making. | Quoted to outline the Commissioner’s obligations under natural justice. |
Court's Reasoning and Analysis
1. Meaning of “necessary” in condition 6. The Court held that condition 6 requires three inquiries: (a) the existence of a legitimate interest; (b) whether the processing is necessary for that interest; and (c) whether the processing is unwarranted by reason of prejudice to data subjects. “Necessary” is not limited to measures that are indispensable; it means “reasonably necessary”, assessed through a proportionality lens familiar to EU and ECHR jurisprudence. The measure must be the least restrictive means of advancing the legitimate interest.
Applying this, the Court accepted the Commissioner’s findings that:
- The Requester’s pursuit of pay-equality data is a legitimate public interest.
- No alternative, less intrusive method could satisfy that interest because anonymised head-counts by spinal-column point are the only way to test suspected pay disparity.
- Disclosure would not meaningfully threaten the privacy of individual employees because their identities could not be deduced from the data set.
2. Article 8 ECHR considerations. Because the information could not identify individuals, the Court found minimal—if any—interference with the right to respect for private life. Nonetheless, the proportionality analysis under condition 6 furnished the required Article 8 balance.
3. Alleged breach of natural justice. Referring to Glasgow City Council and Doody, the Court reiterated that the Commissioner must disclose new, adverse material obtained during an investigation. However, the undisclosed correspondence added nothing that Company A did not already know: the Requester’s role in equal-pay litigation, the purpose of the request, and claims that other councils had released similar data. Because the withheld exchanges were neither novel nor adverse, the Commissioner’s process was fair.
Holding and Implications
APPEAL DISMISSED.
The Supreme Court affirmed the Commissioner’s decision requiring disclosure of anonymised pay-scale statistics. The ruling clarifies that, within condition 6 of the DPA 1998, “necessary” imports a proportionality test: disclosure is justified where it is the least-intrusive means of advancing a legitimate interest and does not cause unwarranted prejudice to data subjects. Procedurally, the judgment confirms that the Commissioner need not share every piece of correspondence, only new material that is both adverse and unknown to the public authority. While the decision does not create new substantive precedent, it provides authoritative guidance on reconciling data-protection and freedom-of-information regimes.
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