Disciplinary Process Mistakes UK Employers Make Before the Hearing Starts
By the time a disciplinary hearing actually begins, the procedural damage in most failed cases has already been done. The corridor conversations, the WhatsApp messages, the twenty-second suspension decision, the manager who quietly made up their mind a week earlier — all of it has happened before anyone formally sits down. The hearing is where it becomes visible to the employee, their representative, and eventually a tribunal.
This is the part of the disciplinary process that catches owner-led businesses out most often. Managing directors and operations leads tend to think about disciplinaries in terms of what happens in the meeting itself — the letter, the room, the outcome. Tribunals look at something much wider. They look at the entire chain of decisions and conversations that led up to that meeting, and they look at it with the benefit of hindsight, full disclosure, and the employee's solicitor pointing at every misstep along the way.
The pattern is consistent enough that it is worth naming the specific things that go wrong before a disciplinary process formally begins, because each one is fixable if you know it is happening. None of them require a lawyer to spot. They require someone to slow down at the right moment and ask whether what is about to happen will stand up to scrutiny later.
The decision is made before the investigation
This is the single most common pre-meeting failure, and it is usually invisible to the employer making it. A manager forms a view about an employee, often a reasonable view based on real frustrations, and then the disciplinary process is started to formalise an outcome that has already been decided. The investigation that follows tends to look thorough on paper while functioning as a confirmation exercise.
The legal problem with this is well established. The Burchell test, set down in 1980 in British Home Stores v Burchell, requires an employer to hold a genuine belief in the employee's misconduct, to have reasonable grounds for that belief, and to have carried out a reasonable investigation before forming it. Where the investigation has been a formality, the second and third limbs of that test fall apart, and any subsequent dismissal is procedurally unfair regardless of how clearly the employee's conduct deserved sanction.
The practical fix is uncomfortable but simple. Before any investigation begins, the person commissioning it must be willing to articulate, out loud, what outcome they would accept if the investigation produced something inconvenient. If they cannot honestly imagine reaching a conclusion other than the one they already favour, the process is compromised before it starts. Bring in someone who has not formed a view, or pause and reset. The cost of a delayed disciplinary is always smaller than the cost of an unfair dismissal finding nine months later.
Suspension is being used too quickly and without justification
Suspension is one of the most consequential decisions in a disciplinary process, and it is routinely made within minutes by managers who treat it as a neutral pause. The employee is sent home on full pay while the matter is looked into. From the manager's perspective, nothing has been decided, and no one has been punished. Tribunals see it differently. They view suspension as a serious act that requires its own justification, and they increasingly treat automatic or knee-jerk suspension as evidence that a view about guilt had already been formed.
The relevant question, which most owner-led businesses never ask before suspending, is whether suspension is genuinely necessary to protect the investigation, the alleged victim, the workplace, or the business. If the answer is not clear and specific, the suspension itself becomes a procedural weakness. Employees who are suspended without good reason and later return to work as successful tribunal claimants are not rare. They are routine.
The fix here is to write down, before any suspension is imposed, exactly why no lesser measure would work. Could the employee be moved to a different shift? Could they work from home? Could they be reassigned to non-customer duties? If a workable alternative exists and was not considered, suspension was the wrong call. This single discipline, forcing the question to be asked and the answer recorded, eliminates a large category of procedural risk.
The investigator and the decision maker are the same person
In smaller businesses, this happens almost by default. There is one manager who knows the situation, one MD who runs the business, and there simply is no one else available to run an investigation. So the same person who first heard the complaint becomes the investigator, then the disciplinary chair, and sometimes also the appeal manager. By the time the process is finished, the employee has had every stage of their case heard by someone who was already involved at the start.
The ACAS Code of Practice on Disciplinary and Grievance Procedures is clear that, wherever possible, different people should handle the investigation, the disciplinary hearing, and any appeal. An unreasonable failure to follow the Code allows employment tribunals to increase compensation by up to twenty-five per cent. That uplift applies on top of any award for unfair dismissal, and recent cases have shown tribunals applying the full twenty-five per cent where the procedural failures were serious.
The defence of small business size is real but limited. Tribunals will take the size and resources of an employer into account when judging what was practicable. They will not, however, accept that no separation was possible if there was an obvious alternative that was simply not considered. Other directors, external HR support, or, in some cases, a trusted manager from a different part of the business can usually be drafted in for at least one stage of the process. The key is that the separation has been thought about, not that it has been perfect.
The allegation is too vague for the employee to actually answer
This one is almost always discovered after the fact, when an employee's solicitor points out that the invite letter to the disciplinary hearing referred to general concerns about conduct or performance without specifying what the employee was actually accused of. The employee turned up to a hearing without knowing exactly what they needed to defend themselves against. Whatever happened next is procedurally compromised.
The ACAS Code requires employers to inform employees of the basis of the problem in writing, giving them sufficient information to prepare a response, before a disciplinary meeting takes place. In practice, this means specific incidents, specific dates where possible, specific witnesses where relevant, and specific policy or contractual provisions allegedly breached. A letter that simply mentions concerns about behaviour and a wish to discuss them will not satisfy that standard, and a tribunal will say so.
The fix is mechanical. Before any invite letter goes out, the person drafting it should ask whether an employee receiving this letter could realistically prepare for the hearing. If the honest answer is no, the letter is not yet ready. This sounds obvious, and yet it is one of the most frequent gaps in disciplinary documentation that comes across the desk of an experienced HR adviser.
Consistency is not checked across the workforce
Tribunals look very carefully at how comparable cases have been handled in the same business. If an employee is dismissed for something that another employee did six months earlier and received a written warning for, the dismissal is exposed to a consistency challenge that is genuinely difficult to defend. The question the tribunal will ask, in the language of the band of reasonable responses test, is whether dismissal was a response a reasonable employer could have reached, given how the same employer had treated similar conduct before.
The risk here grows quietly. A manager who is now applying a stricter standard than was applied a year ago by a different manager may have perfectly good reasons for doing so. Standards may have moved on, the business may have grown, and the consequences of the same behaviour may now be greater. None of that matters at tribunal unless the change in approach has been communicated, documented, and applied consistently from a defined point forward. Otherwise, it looks arbitrary.
Before a disciplinary outcome is finalised, someone should check what has happened in comparable cases in the past two to three years. Where there is inconsistency, the question becomes whether it can be explained, and the explanation needs to make sense to someone who was not there at the time.
The informal route was skipped
The ACAS Code is explicit that many potential disciplinary issues should be resolved informally where possible. Tribunals take this seriously. Where a relatively minor matter has been escalated straight to a formal disciplinary hearing without any prior conversation, informal warning, or attempt to address the issue more proportionately, the disciplinary process itself can be found unfair on the basis of disproportionate response.
This often happens when a manager has been carrying frustration about an employee for some time and finally finds an incident that justifies formal action. The incident might genuinely warrant a disciplinary, but the absence of any prior informal engagement makes it look retaliatory. The employee's representative will argue that the formal process was the manager's first attempt to address a long-standing concern, which is procedurally dubious.
The discipline of the informal conversation is one of the most undervalued tools in UK people management. A direct, recorded, dated conversation that names the issue and sets an expectation does more to protect the business than three written warnings drafted six months later. It also, in many cases, fixes the problem without the need for a formal process at all.
What this looks like across other people decisions
These pre-meeting failures do not only show up in conduct cases. They are present in capability cases, long-term sickness cases, and performance dismissals as well, and the same principles apply. The article on long-term sickness and capability dismissal walks through how the same kinds of pre-decision shortcuts cause problems in absence cases, where the legal terrain is different but the human pattern is identical.
The common thread is that the decisions which determine whether a process holds up are almost always made before the formal stages begin. By the time the hearing is on the calendar, the room for procedural recovery is narrow. This is why our HR consultancy support focuses on the moment a difficult people decision is taking shape, well before the paperwork begins. It is also why retained HR support tends to pay for itself the first time a manager pauses, picks up the phone, and asks whether what they are about to do will stand up later.
The honest test
If you are an MD or operations director currently sitting on a disciplinary that has not yet started, the most useful question you can ask is the one tribunals will ask later. Has the decision already been made? Is the investigation a genuine inquiry, or a formality? Could the employee actually prepare to defend themselves based on what they have been told? Has anyone with no prior involvement looked at the case fresh? Have you handled the same kind of conduct the same way before?
If any of those questions produce an uncomfortable answer, the most useful thing you can do is pause for a day, get a second pair of eyes on the situation, and adjust before the process becomes harder to fix. Most of the disciplinary cases that go badly for employers were entirely avoidable at this stage. The ones that went well usually involved someone, somewhere in the process, slowing down at the right moment.
If this reflects a situation you are currently working through, or one you can see coming, the practical next step is a private conversation before the formal stages start. Our full range of services covers the wider HR, leadership and people support that often sits behind these decisions, but the disciplinary itself is usually best handled by talking it through directly, in confidence, with someone who has seen how these cases tend to land.
