Hardys & Hansons plc v Lax [2005] EWCA Civ 846

In brief

Hardys & Hansons plc v Lax [2005] EWCA Civ 846 is the leading Court of Appeal authority on the proportionality standard in indirect discrimination. The Court confirmed that objective justification requires the tribunal to conduct its own critical evaluation — weighing the genuine business need against the discriminatory impact — and that neither a margin of appreciation nor a 'band of reasonable responses' test applies.

Key provisions

• LAX-01 — Proportionality test — no margin of appreciation: When assessing objective justification for indirect discrimination, the tribunal must conduct its own critical evaluation. It cannot substitute a margin-of-appreciation or band of reasonable responses test.
• LAX-02 — Reasonably necessary = proportionality, not strict necessity: The word 'necessary' in the Bilka test is qualified by 'reasonably'. This does not require the employer to show the measure was the only possible course, but requires proof of a real need.
• LAX-03 — Objective balance: discriminatory effect vs genuine business need: Justification requires an objective balance between the discriminatory effect and the reasonable needs of the employer. The more serious the disparate impact, the more cogent the justification must be.
• LAX-04 — Tribunal must conduct critical evaluation: It is insufficient for a tribunal simply to pose the statutory question. It must demonstrate a critical evaluation: identifying the real need, considering the seriousness of the impact, and assessing whether the need outweighs it.
• LAX-05 — Employer's exaggeration undermines justification: Where employer witnesses greatly overstate the impracticability of an alternative arrangement, the tribunal is entitled to treat this as a failure of genuine engagement.
• LAX-06 — Bilka three-stage structure confirmed: Objective justification requires: (1) legitimate objective; (2) appropriate means; (3) reasonably necessary. All three stages must be addressed.

When relevant

Critical for any scenario where an employer or service provider claims operational necessity for a restriction affecting trans people. Means a tribunal will not rubber-stamp a 'reasonable management decision' — it will independently assess whether the restriction was truly necessary. Directly relevant to: facility access decisions, dress code policies, single-sex service restrictions, occupational requirements. Strengthens the Proportionality Wizard and L2-B4 Flowchart by confirming that the tribunal applies its own judgment.