Shamoon v Chief Constable of the Royal Ulster Constabulary [2003] UKHL 11

In brief

Chief Inspector Shamoon was stripped of her counselling and appraisal responsibilities for constables following Police Federation representations — a function her male counterparts retained. SHAMOON LOST: the House of Lords dismissed her appeal [65], [120] and did NOT restore the tribunal's finding. It held that 'the proper course is to uphold the decision of the Court of Appeal to reverse the tribunal's decision and to dismiss the appellant's complaint because there was no evidence before the tribunal upon which they could properly find that Superintendent Laird treated her less favourably than he treated or would have treated a male police officer' [90]. The authority survives its own outcome on the two points for which it is cited: the test for 'detriment' — a reasonable worker would or might take the view that the treatment was to their disadvantage — and the analytical approach to the comparator question, which favours resolving the 'reason why' question first rather than treating the comparator as a threshold gate.

Key provisions

• shamoon-hl-2003-p1 — Definition of detriment — reasonable worker test: A detriment exists if a reasonable worker would or might take the view that the treatment was in all the circumstances to their detriment. It is not necessary to show physical or economic consequence.
• shamoon-hl-2003-p2 — Detriment — materiality threshold: The test of materiality requires that the treatment be of a kind that a reasonable worker would or might regard as disadvantageous in the circumstances in which they thereafter work. An unjustified sense of grievance alone does not suffice.
• shamoon-hl-2003-p3 — Two-stage vs single-question approach to discrimination: Tribunals need not always resolve less favourable treatment (stage 1) before the reason why (stage 2). Where the comparator is disputed, it may be more efficient to ask why the claimant was treated as they were, with the answer resolving the less favourable treatment issue.
• shamoon-hl-2003-p4 — Comparator — same or not materially different circumstances: The statutory comparator must be in the same, or not materially different, circumstances to the claimant. Differences in circumstances which are themselves a product of discriminatory treatment should not be treated as material differences.
• shamoon-hl-2003-p5 — Positional/reputational disadvantage as detriment: Loss of a function that was part of the claimant's normal practice and which reduced her standing among colleagues and those over whom she exercised authority constituted a detriment, even without formal demotion or financial loss.

When relevant

When assessing whether treatment of a trans employee amounts to discrimination — particularly where no direct comparator exists and a hypothetical comparator must be constructed.