Summary
For the knowledge defence to disability discrimination, an employer need not know the claimant’s diagnosis. It must, however, show that it did not know, and could not reasonably have been expected to know, the facts constituting disability: a physical or mental impairment with a substantial and long-term adverse effect on normal day-to-day activities.
An employment tribunal errs if it treats notice of a particular diagnosis as the governing question. The error will not affect the result where a sustainable factual finding establishes that reasonable enquiries would not have yielded the relevant knowledge, including because the claimant would have refused assessment.
Factual background
The claimant alleged disability discrimination under sections 13 and 15 of the Equality Act 2010. He relied on Asperger’s syndrome, diagnosed in 2018, and alleged that the respondent’s refusal between 2017 and 2019 to consider him for appointments was discriminatory.
The London Central Employment Tribunal dismissed the claims. It unanimously found no actual knowledge of disability and, by majority, no constructive knowledge. The claimant appealed, contending that the Tribunal had wrongly required knowledge of Asperger’s or autism spectrum disorder rather than knowledge of the factual features of disability.
The central issue was whether the Tribunal had applied the correct test for actual and constructive knowledge.
Held
Appeal dismissed. The Employment Tribunal permissibly found that the respondent had no actual knowledge of the claimant’s disability. Treating a person as odd, socially inept, slightly arrogant or sensitive did not, without more, establish knowledge of a mental impairment amounting to disability.
The relevant inquiry under section 15(2) of the Equality Act 2010 was not whether the respondent knew, or could reasonably have discovered, the diagnosis of Asperger’s syndrome. It was whether it knew, or could reasonably have been expected to know, that the claimant had a mental impairment with a substantial and long-term adverse effect on normal day-to-day activities. That approach equally applied to the knowledge required for direct disability discrimination.
The majority reasoning of the Tribunal was unsafe to the extent that it asked whether the respondent should have been alerted to an autistic spectrum disorder. That was a higher and incorrect test. The Tribunal had to consider whether the available information should reasonably have prompted enquiry into the effects of a possible mental impairment generally.
That error did not require the appeal to succeed. The Tribunal majority had made an unchallenged counterfactual finding that the claimant would have resisted an assessment if the respondent had sought further enquiry. On that finding, reasonable investigation would not have given the respondent knowledge of the factual constituents of disability. It was therefore entitled to conclude that the respondent neither had, nor could reasonably have been expected to have, the requisite knowledge.
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Appellate history
- Employment Appeal Tribunal: Appeal dismissed: [2024] EAT 81 .
- London Central Employment Tribunal: Claims under sections 13 and 15 of the Equality Act 2010 dismissed. The decision was sent to the parties on 21 December 2021.
Key cases cited
16 authorities cited.
- DPP Law Ltd v Greenberg [2021] EWCA Civ 672
- City of York Council v Grosset [2018] EWCA Civ 1105
- Donelien v Liberata UK Ltd [2018] IRLR 535
- Gallop v Newport City Council [2013] EWCA Civ 1583
- Yeboah v Crofton [2002] IRLR 634
- Anya v University of Oxford [2001] EWCA Civ 405
- A Ltd v Z [2019] UKEAT 0273_18_2803
- Herry v Dudley Metropolitan Council [2017] ICR 610
- Aderemi v London and South Eastern Railway Ltd [2013] ICR 591
- J v DLA Piper UK LLP [2010] ICR 1052
- Secretary of State for Work and Pensions v Alam [2010] ICR 665
- Paterson v Comr of Police of the Metropolis [2007] ICR 1522
- Pnaiser v NHS England [2016] IRLR 170
- Gallop v Newport City Council (No. 2) [2016] IRLR 395
- Ridout v TC Group [1998] IRLR 628
- Donelien v Liberata UK Ltd
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Cases citing this case
1 later case · 1 positive
Most senior citing decisions:
- Tesco Stores Limited v K Element & Ors [2025] EAT 112 applied
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