Unfair Dismissal Grounds

A Complete Guide to the Legal Grounds for Unfair Dismissal in England and Wales

At Blackstone Solicitors, we regularly advise employees and employers on unfair dismissal grounds across England and Wales. Understanding the legal basis on which a dismissal can be challenged is essential, whether you are facing termination or managing a workplace process.

Unfair dismissal law is designed to ensure that employees are not dismissed without a fair reason and a fair procedure. However, the law is detailed, and whether a dismissal is fair often depends on both the reason and how the decision was reached.

This article explains the main unfair dismissal grounds, how tribunals assess claims, and what employers must do to avoid legal risk.

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What Are Unfair Dismissal Grounds

Understanding the Legal Framework

Unfair dismissal grounds refer to the legal reasons an employee may rely on to challenge their dismissal as unfair.

In employment law, a dismissal is generally assessed in two stages:

1. Was there a potentially fair reason for dismissal
2. Was the employer’s decision and process reasonable in all the circumstances

Even if a valid reason exists, the dismissal may still be unfair if the procedure was flawed.

The key question is not simply whether the employer was justified, but whether the dismissal was handled fairly and reasonably.

The Five Fair Reasons for Dismissal

What Employers Can Lawfully Rely On

Under UK law, an employer must show one of five potentially fair reasons for dismissal.

These are the foundation for assessing unfair dismissal grounds.

1. Conduct

Misconduct as a Dismissal Ground

Conduct is one of the most common dismissal reasons.

This may include:

• Gross misconduct such as theft or fraud
• Persistent lateness or absence
• Breach of company policies
• Insubordination or refusal to follow instructions
• Workplace bullying or inappropriate behaviour

However, misconduct dismissals must be supported by evidence and a fair disciplinary process.

A rushed or unsupported decision is a common basis for unfair dismissal claims.

2. Capability or Performance

When Work Performance is an Issue

Capability relates to an employee’s ability to perform their role.

This may involve:

• Poor performance
• Lack of required skills
• Inability to meet targets
• Long term illness affecting ability to work

Employers are expected to provide:

• Clear performance expectations
• Warnings and improvement plans
• Support and training where appropriate

Dismissals without proper performance management are often challenged as unfair.

3. Redundancy

Genuine Business Restructuring

Redundancy is a lawful dismissal ground where:

• The business closes or reduces workforce
• The need for a particular role disappears
• The workplace relocates

However, redundancy must be genuine.

Unfair dismissal grounds often arise where:

• Selection criteria are unfair or subjective
• There is no meaningful consultation
• Alternative roles are not considered
• The redundancy is a disguise for dismissal

Tribunals scrutinise redundancy processes carefully.

4. Statutory Illegality

When Employment Cannot Continue Legally

A dismissal may be fair if continuing employment would breach the law.

Examples include:

• Loss of a required work visa
• Loss of professional licence
• Legal prohibition on working in a role

This ground is less common but can arise in regulated professions.

Employers must still act reasonably and consider alternatives where possible.

5. Some Other Substantial Reason

The Flexible Category

This category is broad and used where no other reason applies.

Examples include:

• Business restructuring
• Breakdown in working relationships
• Third party pressure to dismiss
• Reorganisation requiring role changes

Even under this category, employers must still show a fair process.

Procedural Fairness in Unfair Dismissal Grounds

Why Process Matters as Much as Reason

Even where a fair reason exists, dismissal may still be unfair if the procedure is not reasonable.

Tribunals consider whether the employer:

• Conducted a proper investigation
• Notified the employee of concerns
• Held a disciplinary hearing
• Allowed representation
• Considered mitigation or explanations
• Provided a right of appeal

Procedural fairness is often where employers fail.

A strong reason does not excuse a poor process.

Unfair Dismissal Grounds in Misconduct Cases

Common Legal Issues

Misconduct dismissals are frequently challenged on unfair dismissal grounds.

Typical problems include:

• Insufficient investigation before dismissal
• Bias in decision making
• Lack of evidence
• Failure to consider alternative sanctions
• No opportunity for employee response

Tribunals expect employers to follow ACAS Code of Practice standards.

Failure to do so can significantly increase compensation awards.

Unfair Dismissal Grounds in Performance Cases

Capability and Fair Warning

Performance related dismissals must be handled carefully.

Unfair dismissal grounds often arise where:

• No performance warnings were issued
• Employees were not given time to improve
• Support or training was not provided
• Targets were unrealistic or unclear
• Appraisals were not properly conducted

Employers must show a fair and structured performance management process.

Unfair Dismissal Grounds in Redundancy Cases

Fair Selection and Consultation

Redundancy dismissals are closely examined by tribunals.

Common unfair dismissal grounds include:

• Lack of meaningful consultation
• Unfair selection pools
• Subjective scoring systems
• Failure to consider alternative employment
• Predetermined outcomes

A fair redundancy process must be transparent and evidence based.

Constructive Dismissal as a Ground

When Employees Resign but Claim Unfair Treatment

Constructive dismissal is a specific type of unfair dismissal claim.

It occurs when an employee resigns due to employer conduct that breaches contract.

Examples include:

• Bullying or harassment
• Unilateral changes to terms
• Failure to deal with grievances
• Hostile working environment
• Breach of trust and confidence

The employee must show that the employer’s conduct was serious enough to justify resignation.

Automatically Unfair Dismissal Grounds

No Length of Service Required

Some dismissals are automatically unfair, meaning employees do not need two years’ service.

These include dismissals connected to:

• Pregnancy or maternity
• Whistleblowing
• Health and safety concerns
• Trade union activities
• Exercising statutory rights
• Refusal to work in unsafe conditions

These claims often lead to higher compensation.

Discrimination and Unfair Dismissal Grounds

Overlapping Legal Claims

Dismissal may also be unfair if linked to discrimination.

Protected characteristics include:

• Age
• Disability
• Sex
• Race
• Religion or belief
• Sexual orientation
• Gender reassignment

Discrimination claims are particularly serious because compensation is unlimited.

They often run alongside unfair dismissal claims.

Time Limits for Bringing Claims

Acting Quickly is Essential

Unfair dismissal claims must usually be brought within:

• Three months less one day from the date of dismissal

Before issuing a claim, employees must go through ACAS Early Conciliation.

Missing deadlines can prevent a claim from proceeding entirely.

Compensation for Unfair Dismissal

What Tribunals Can Award

If a claim succeeds, compensation may include:

Basic Award

Calculated based on:

• Age
• Length of service
• Weekly pay limits

Compensatory Award

Covering financial losses such as:

• Loss of earnings
• Future loss of income
• Loss of benefits
• Pension loss

Tribunals may reduce compensation if the employee contributed to dismissal or failed to mitigate losses.

Employer Defences to Unfair Dismissal Grounds

How Employers Justify Dismissals

Employers may defend claims by showing:

• A fair reason for dismissal
• A reasonable investigation
• A proper disciplinary process
• Consistent treatment of employees
• Clear documentation of decisions

Strong HR processes are key to defending claims successfully.

Common Employer Mistakes

Why Dismissals Become Unfair

Many unfair dismissal claims arise due to avoidable errors, including:

• Poor documentation
• Rushed decision making
• Inconsistent disciplinary action
• Failure to follow internal policies
• Lack of proper investigation
• Ignoring employee explanations

Small procedural mistakes can have large legal consequences.

Why Legal Advice on Unfair Dismissal Grounds Matters

Early Strategy Can Change Outcomes

Whether bringing or defending a claim, early legal advice can:

• Clarify strengths and weaknesses
• Identify procedural errors
• Improve settlement outcomes
• Reduce tribunal risk
• Strengthen evidence gathering

Many disputes are resolved before reaching a final hearing when handled properly.

How Blackstone Solicitors Can Help

Expert Employment Law Support

At Blackstone Solicitors, we advise employees and employers on unfair dismissal grounds across England and Wales.

We assist with:

• Unfair dismissal claims and defences
• Constructive dismissal cases
• Redundancy disputes
• Disciplinary and performance processes
• Settlement agreements
• Employment tribunal representation

Our approach is practical, clear, and focused on achieving effective resolution.

How to Contact Our Employment Law Solicitors

It is important for you to be well informed about the issues and possible implications of Employment Law. However, expert legal support is crucial in terms of ensuring a positive outcome to your case.

To speak to our Employment law solicitors today, simply call us on 0345 901 0445, or click here to make a free enquiry. We are well known across the country and can assist wherever you are based. We also have offices based in Cheshire and London.

Please visit our website to see all the Employment Law services we offer: https://blackstonesolicitorsltd.co.uk/employment-law-services/

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