Health & Safety Training

Accident Investigation & Reporting Course

A practical one-day course that gives managers and supervisors a systematic method for investigating workplace accidents, finding the real causes and putting in controls that stop them happening again.

1 day · at your site In-company UK-wide Certificate of attendance Managers, supervisors, H&S staff
Key facts at a glance
1 day
Course lengthdelivered at your premises
Hands-on
Case-study methodpractise on real scenarios
Root cause
The focusnot just immediate causes
RIDDOR
Reporting coveredwhat is reportable and when
The course
Quick answer

What is accident investigation training?

Accident investigation training teaches a systematic way to investigate workplace accidents and near misses: gathering the facts, working out the immediate and underlying causes, and deciding the controls that will prevent a repeat. KeyOstas delivers it in one day at your premises.

A repeatable, structured method for any investigation
Gets past the immediate cause to the real root causes
Covers reporting, including what RIDDOR requires
Certificate of attendance for every delegate
A good investigation is not about blame. It is about understanding why an accident happened so the same chain of events cannot happen again. This course gives managers, supervisors and health & safety staff a clear toolkit for collecting evidence, questioning people fairly, separating immediate causes from root causes, and choosing controls that work. It follows the approach in the HSE guidance on investigating accidents and incidents (HSG245).
1 day
to a repeatable method
Root causes
where the course focuses
RIDDOR 2013
the reporting framework
Is it right for you

Is this course right for your team?

It is for the people who are, or will be, asked to investigate when something goes wrong.

Right for you if…

You want managers and supervisors to investigate accidents consistently
Your investigations tend to stop at the immediate cause
You need staff who understand what RIDDOR requires you to report
You want near misses investigated, not just injuries
You are building an honest, learning-focused safety culture

A different course fits better if…

You need a full health & safety management qualification (consider IOSH Managing Safely)
You only need to record accidents, not investigate their causes
You want a regulated, accredited qualification: this is a certificate of attendance
After the course

What you will be able to do

By the end of the day, every delegate will be able to do the following.

Investigate

Understand accident causation

Explain how injury, damage and near-miss events are linked, using the domino theory and accident ratios.

Find the immediate causes

Analyse an accident to identify the unsafe acts and conditions that triggered it.

Find the root causes

Dig past the immediate cause to the underlying management and organisational failures.

Question effectively

Use open questioning techniques to gather accurate information without leading or blaming.

Act on it

Choose effective controls

Suggest precautionary and preventative measures that address the real causes.

Run an investigation

Apply the right level of resource and effort to an investigation in proportion to the risk.

Report correctly

Know what must be reported under RIDDOR, and to whom, and within what time.

Keep good records

Maintain investigation records and share the lessons learned across the organisation.

Course content

What the course covers

One day of structured content built around a real accident-causation case study.

01

Why we investigate

  • A legislation update and the legal background
  • The purpose of accident investigation
  • A case study in accident causation
  • Why blame-free investigation works better
02

How accidents happen

  • The accident definition, the domino theory and accident ratios
  • Immediate causes and root causes
  • The role of human behaviour in accident causation
  • Injury, damage and near-miss events and how they connect
03

Investigation technique

  • Gathering and preserving evidence
  • Open questioning techniques for interviews
  • Applying the right resource and effort to an investigation
  • Working from immediate causes through to root causes
04

Prevention & reporting

  • Accident prevention techniques and choosing controls
  • Reporting accidents, including RIDDOR 2013 requirements
  • Maintaining records and information
  • Sharing the lessons learned, with discussion and close
Assessment

How the course is assessed and certificated

Practical and discussion-led, worked through real scenarios.

Format

Instructor-led, in-company

A KeyOstas tutor delivers the day at your premises, and your own incident procedures can be built in.

Assessment

Case-study and discussion-based

There is no written exam. Delegates apply the method to case studies and discuss their findings.

Certificate

Certificate of attendance

Every delegate receives a KeyOstas certificate of attendance on completion.

This is practical, in-company training rather than a regulated qualification. For a broader health & safety management course, IOSH Managing Safely may suit, and KeyOstas also runs the NEBOSH HSE Introduction to Incident Investigation.
Why KeyOstas

Why train with KeyOstas

Four decades of practical, in-company health & safety training.

01

Delivered at your site

We come to you, anywhere in the UK, and train your team around your shift pattern.

02

Built around your procedures

Your own accident and incident reporting procedures can be built into the day.

03

A method they will use

Delegates leave with a structured toolkit they can apply to the next investigation.

04

Specialists since 1984

Four decades of training UK workforces with practical instruction, not generic e-learning.

FAQ

Accident investigation training: frequently asked questions

Who should attend accident investigation training?
Managers, supervisors and health & safety staff: anyone who is, or may be, asked to investigate workplace accidents, incidents or near misses.
How long is the course?
One day, delivered in-company at your premises.
Is accident investigation a legal requirement?
Investigating is not named as a duty in a single regulation, but employers must manage health and safety risks under the Health and Safety at Work Act and the Management Regulations, and a proper investigation is how you find and fix the causes. Separately, RIDDOR 2013 requires certain injuries and incidents to be reported.
What is the difference between an immediate cause and a root cause?
The immediate cause is the unsafe act or condition that directly led to the accident. The root cause is the underlying management or organisational failure that allowed it. Fixing only the immediate cause tends to let the accident happen again.
Does the course cover RIDDOR?
Yes. The course covers reporting accidents, including what RIDDOR 2013 requires you to report and the timescales involved.
Should near misses be investigated too?
Yes. A near miss is a free warning. Investigating near misses lets you fix the causes before anyone is hurt, and the course covers how to do that.
Is this an accredited qualification?
It is a KeyOstas course with a certificate of attendance: practical training rather than a regulated qualification.
Can the course use our own incident procedures?
Yes. We can build your own accident and incident reporting procedures and forms into the day so the training reflects how you actually work.

Train your team to investigate properly

Tell us how many managers and supervisors you would like to train, and we will put together a quote for the one-day course delivered at your site.

Last reviewed: May 2026. Checked against current UK health & safety legislation and HSE guidance.