O’Brien v Chief Constable of South Wales Police
E655793
O’Brien v Chief Constable of South Wales Police is a leading UK Supreme Court case on employment status and part-time worker rights, particularly concerning whether part-time judicial office holders qualify as “workers” entitled to equal treatment.
All labels observed (1)
| Label | Occurrences |
|---|---|
| O’Brien v Chief Constable of South Wales Police canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7296857 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: O’Brien v Chief Constable of South Wales Police Context triple: [Lord Hoffmann, notableWork, O’Brien v Chief Constable of South Wales Police]
-
A.
R v Secretary of State for the Home Department, ex parte Fire Brigades Union
R v Secretary of State for the Home Department, ex parte Fire Brigades Union is a leading UK constitutional law case on the limits of the royal prerogative and the executive’s duty to implement legislation enacted by Parliament.
-
B.
R (Jackson) v Attorney General
R (Jackson) v Attorney General is a landmark 2005 House of Lords case that examined the constitutional validity of legislation enacted under the Parliament Acts and explored fundamental principles about the limits of parliamentary sovereignty and the rule of law in the UK.
-
C.
R v McIlkenny and others
R v McIlkenny and others is the criminal case in which the men later known as the Birmingham Six were controversially convicted in 1975 for the Birmingham pub bombings, convictions that were ultimately quashed in 1991.
-
D.
Thoburn v Sunderland City Council
Thoburn v Sunderland City Council is a landmark 2002 English administrative law case in which the High Court articulated the concept of "constitutional statutes" within the UK legal system.
-
E.
Walsh v Lonsdale
Walsh v Lonsdale is an English contract and property law case that established the principle that equity regards as done that which ought to be done, allowing equitable leases to be treated as if they were legal leases.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: O’Brien v Chief Constable of South Wales Police Target entity description: O’Brien v Chief Constable of South Wales Police is a leading UK Supreme Court case on employment status and part-time worker rights, particularly concerning whether part-time judicial office holders qualify as “workers” entitled to equal treatment.
-
A.
R v Secretary of State for the Home Department, ex parte Fire Brigades Union
R v Secretary of State for the Home Department, ex parte Fire Brigades Union is a leading UK constitutional law case on the limits of the royal prerogative and the executive’s duty to implement legislation enacted by Parliament.
-
B.
R (Jackson) v Attorney General
R (Jackson) v Attorney General is a landmark 2005 House of Lords case that examined the constitutional validity of legislation enacted under the Parliament Acts and explored fundamental principles about the limits of parliamentary sovereignty and the rule of law in the UK.
-
C.
R v McIlkenny and others
R v McIlkenny and others is the criminal case in which the men later known as the Birmingham Six were controversially convicted in 1975 for the Birmingham pub bombings, convictions that were ultimately quashed in 1991.
-
D.
Thoburn v Sunderland City Council
Thoburn v Sunderland City Council is a landmark 2002 English administrative law case in which the High Court articulated the concept of "constitutional statutes" within the UK legal system.
-
E.
Walsh v Lonsdale
Walsh v Lonsdale is an English contract and property law case that established the principle that equity regards as done that which ought to be done, allowing equitable leases to be treated as if they were legal leases.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
UK Supreme Court case
ⓘ
employment law case ⓘ labour law case ⓘ part-time workers’ rights case ⓘ |
| appliesLaw |
Council Directive 97/81/EC
NERFINISHED
ⓘ
EU equal treatment principles ⓘ Framework Agreement on part‑time work NERFINISHED ⓘ Part‑time Workers (Prevention of Less Favourable Treatment) Regulations 2000 NERFINISHED ⓘ |
| areaOfLaw |
EU law
NERFINISHED
ⓘ
discrimination law ⓘ employment law ⓘ labour law ⓘ |
| citationStatus |
landmark case
ⓘ
leading authority ⓘ |
| concerns |
Part‑time Workers (Prevention of Less Favourable Treatment) Regulations 2000
NERFINISHED
ⓘ
employment status ⓘ equal treatment ⓘ judicial office holders ⓘ part-time workers ⓘ pension rights ⓘ pro‑rata principle ⓘ |
| country | England and Wales NERFINISHED ⓘ |
| court | Supreme Court of the United Kingdom NERFINISHED ⓘ |
| holding |
exclusion of part‑time judges from pension schemes requires objective justification
ⓘ
part‑time judges are entitled not to be treated less favourably than comparable full‑time judges unless objectively justified ⓘ part‑time judicial office holders can fall within the concept of worker for the purposes of EU part‑time work protections ⓘ |
| impact |
clarified that judicial office holders can be covered by part‑time worker protections
ⓘ
influenced subsequent claims by part‑time judges for pension rights ⓘ strengthened protection against less favourable treatment of part‑time workers in the UK ⓘ |
| involves |
assessment of objective justification for differential treatment
ⓘ
comparison between part‑time and full‑time judges ⓘ interpretation of EU law by a UK court ⓘ |
| jurisdiction | United Kingdom ⓘ |
| languageOfProceedings | English ⓘ |
| leadingCaseOn |
application of part‑time worker protections to office holders
ⓘ
definition of worker for part‑time work protections ⓘ entitlement of part‑time judges to pensions ⓘ status of part‑time judicial office holders ⓘ |
| legalSystem | English law ⓘ |
| party |
Chief Constable of South Wales Police
NERFINISHED
ⓘ
John O’Brien NERFINISHED ⓘ |
| relatedTo |
Part‑time Workers Directive
NERFINISHED
ⓘ
judicial pensions ⓘ status of office holders in employment law ⓘ |
| subjectMatter |
whether a part‑time recorder qualifies as a worker
ⓘ
whether denial of pension to a part‑time judge is unlawful less favourable treatment ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: O’Brien v Chief Constable of South Wales Police Description of subject: O’Brien v Chief Constable of South Wales Police is a leading UK Supreme Court case on employment status and part-time worker rights, particularly concerning whether part-time judicial office holders qualify as “workers” entitled to equal treatment.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.