Gross misconduct investigations

Gross misconduct investigations must be carried out with a proper process ideally with an expert to support you. 

 

Recently, an employment tribunal awarded more than £12,000 to a woman, ruling that she had been unfairly dismissed because the employer’s investigation was flawed. The issue wasn’t necessarily that the employer had concerns. It was that the process didn’t stand up to scrutiny. 

 

This is where many employers get caught out. 

 

When gross misconduct is alleged, emotions run high.  

A business owner or leaders will the feel pressure to act quickly and reputations feel at risk. Other staff may demand action but acting decisively is not the same as acting fairly, and tribunals will always prioritise fairness. 

 

At Plain Talking HR, we often say: 

 

 

Under the Employment Rights Act 1996, a dismissal must be for a fair reason and carried out in accordance with a fair procedure. 

Even if the alleged behaviour appears serious, a poor investigation can mean: 

• The dismissal is ruled unfair 

• Compensation is awarded 

• The employer faces legal costs and management time loss 

• Reputational damage follows 

Tribunals don’t expect perfection what they do expect is reasonableness. If the investigation looks biased, rushed, incomplete or predetermined, the risk of losing increases dramatically. 

 

Failure to follow the ACAS Code of Practice on Disciplinary and Grievance Procedures can also increase compensation awards by up to 25%. 

That’s not a technicality, that’s a financial and reputational risk. 

 

 

 

A flawed investigation doesn’t just create legal exposure; it also undermines trust. It damages your internal culture. 

 

When employees see: 

• Decisions made before facts are gathered 

• One-sided questioning 

• Favouritism or inconsistency 

• Poor documentation 

 

They lose trust in leadership and that can mean  

• Higher staff turnover 

• Other grievances 

• Whistleblowing complaints 

• Reduced engagement and productivity 

 

In today’s environment, word spreads quickly. A mishandled dismissal can affect the employer brand far beyond the individual case. 

 

 

Gross misconduct allegations often trigger strong reactions: 

• “This is unacceptable.” 

• “We can’t tolerate this.” 

• “We need to send a message to other staff.” 

But tribunals do not assess emotion, they are there to assess fairness. 

When leaders skip steps, rely on assumptions, or treat investigation as a box-ticking exercise, they expose the organisation to unnecessary risk. 

A flawed investigation can make even a potentially fair dismissal unsafe. 

 

 

Not every allegation is straightforward. Witnesses misremember and evidence can be incomplete. 

Context can change everything. If the process is weak, you risk: 

 

• Dismissing someone unfairly 

• Keeping someone who shouldn’t remain 

• Escalating conflict unnecessarily 

A robust investigation protects everyone, including the business. 

 

 

Tribunals do take size and resources into account. But “we didn’t know” or “we’re too small for formal HR processes” will not excuse procedural unfairness. 

Small businesses are often at greater risk because: 

• Managers investigate colleagues they work closely with 

• There’s no internal independence 

• Documentation is minimal 

• Policies are outdated 

This is exactly where independent HR support becomes invaluable. 

 

 

In many unfair dismissal cases, the core issue isn’t the misconduct itself.  

It comes down to: 

• Failure to investigate properly 

• Failure to consider alternative explanations 

• Failure to allow the employee to respond fully 

• Failure to separate investigation from decision-making 

 

That recent £12,000 award is a reminder that a flawed process can undo what might otherwise have been a defensible case. 

 

 

At Plain Talking HR, led by Bina Briggs, we support UK employers by: 

• Acting as independent investigators 

• Ensuring processes align with UK employment law 

• Reducing risk before decisions are made 

• Giving leaders confidence that they are acting fairly and defensibly 

 

Because when gross misconduct is alleged, you don’t just need speed. 

You need structure and objectivity. But most of all you need protection. 

 

If you are facing a serious workplace allegation and want to minimise legal and reputational risk, Plain Talking HR can support you through it, clearly, calmly and properly.