
The Polkey v AE Dayton Services Ltd decision is a landmark case in employment law. It was heard in the UK's Court of Appeal in 1987.
The case centered around an employee, Mr. Polkey, who was dismissed for gross misconduct. He claimed that his dismissal was unfair.
The employer, AE Dayton Services Ltd, argued that they had a reasonable procedure for investigating and disciplining employees. However, the court found that the procedure was inadequate.
The court's decision had significant implications for employers and employees alike.
Arguments and Positions
The Appellant's arguments in the Polkey v AE Dayton Services Ltd case centered around the Labour Pump principle and its compatibility with the statutory direction in section 57(3). They argued that the principle conflicts with the requirement to assess the employer's actual conduct at the moment of dismissal, not hypothetical outcomes.
Procedural fairness, including adherence to the Code of Practice on redundancy consultation, is a crucial factor in determining whether the employer acted reasonably. This means that employers must follow a fair and transparent process when making redundancies.
The Appellant also cited authorities such as Earl v. Slater & Wheeler and W. Devis & Sons v. Atkins to support their argument that injustice to the employee is distinct from the question of whether the employer acted reasonably.
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Key Tribunal Questions

If you're facing a tribunal, there are two key questions that the tribunal will have to consider when assessing compensation for unfair dismissal.
The first question is: what if the employer had followed procedure correctly? This is a crucial point, as it can significantly impact the outcome of your case.
The second question is: would there have been a different outcome? This is also a vital consideration, as it helps the tribunal determine whether the dismissal would still have occurred even if the procedure was followed correctly.
If the tribunal concludes that the dismissal would still have occurred, compensation may be reduced. This reduction is often expressed as a percentage of the original compensation award.
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Appellant's Arguments
The British Labour Pump principle conflicts with the statutory direction in section 57(3), which requires assessment of the employer's actual conduct at the moment of dismissal, not hypothetical outcomes.
Procedural fairness is a crucial factor in determining whether the employer acted reasonably, and this includes adhering to the Code of Practice on redundancy consultation.
Authorities such as Earl v. Slater & Wheeler and W. Devis & Sons v. Atkins have demonstrated that injustice to the employee is distinct from the question of whether the employer acted reasonably.
In other words, just because an employee may have been treated unfairly, it doesn't necessarily mean the employer acted unreasonably.
Contributory Fault
Contributory fault can significantly impact a claimant's compensation. It's a crucial argument to consider in employment disputes.
The tribunal can reduce the basic award by up to 100% if the claimant's conduct before dismissal makes it just and equitable to do so. The tribunal doesn't need to know about the conduct at the time of dismissal.
The employment tribunal has a mandatory duty to consider contributory conduct if it finds that the employee contributed to their dismissal. Pleading this in your response to the claim can be helpful.
To reduce the compensatory award, you must show that the dismissal was to some extent caused by the employee's conduct or that their action contributed to their dismissal. The burden of proof is on you to argue this.
Carry out online job searches to show the positions and salaries on offer if you feel the claimant hasn't done enough to find a new role. Set this out in a witness statement to support your argument.
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Key Concepts
Polkey deductions are a crucial consideration in unfair dismissal cases. They can reduce the compensatory award to £0 if the employer's procedural errors are deemed not to have made a difference to the ultimate outcome.
A Polkey deduction is applied by the Tribunal when they consider that the employee would have been dismissed anyway, even if the employer had followed the correct procedure. This was decided by the House of Lords in the case of Polkey v AE Dayton Services Ltd (1987).
The reduction can be up to 100% if the employer's procedural errors are considered not to have made a difference. This means that even if the employee is technically successful in their claim, they may not receive any compensation.
The Tribunal must weigh up and award what they consider to be just and equitable, reflecting the actual loss the employee received. This ensures the award is fair but does not override the decision on whether the dismissal is found to be fair or not.
The employer must put forward arguments under Polkey and support them with evidence to mitigate any reduction in the compensatory award.
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Outcome and Implications
The outcome of Polkey v AE Dayton Services Ltd was a significant one, as the Court of Appeal and Employment Appeal Tribunal decisions were reversed.
The judgment rejected the British Labour Pump principle, a concept that had been widely debated in the employment law community.
The case made it clear that tribunals must assess an employer's conduct based solely on the information available at the time of dismissal, rather than using hindsight.
Procedural fairness, particularly consultation in redundancy situations, was reinforced as a critical component of the reasonableness test.
This decision sets a binding precedent across the United Kingdom, ensuring that procedural lapses cannot be excused by speculative hindsight.
Tribunals will now have to carefully consider the information available at the time of dismissal, which may reduce or eliminate compensation in cases where dismissal would have been inevitable.
The case has clarified the importance of procedural fairness in employment law, providing a clear framework for employers and employees alike to follow.
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