Last reviewed 27 February 2019

Accident reporting and investigation are key to preventing accidents in the workplace. Beverly Coleman explains how focusing on these components can ensure that workplace accidents are reduced to a reasonably practicable level.

According to Health and Safety Executive (HSE) statistics, over one million workers are injured or made ill by their work in Great Britain every year; the effects of which are felt by individuals, their families, employers, the Government and wider society.

With every adverse event there is the human cost: the loss of quality of life or loss of life where there is a fatality, as well as the financial cost which includes paid sick leave, overtime payments, training of temporary employees, production loss, legal fees and the cost of investigating the event.

In the HSE’s Cost Model (Table 1) it was estimated that the total cost of a workplace fatality amounted to £1,617,000. Non-fatal injuries totalled £8400 and seven days or more reportable absences amounted to £30,100. It is easy to see how the annual cost of workplace injury in the UK was an astonishing £5.2 billion in 2016/17.

There are both minor and major accidents in the workplace but regardless of the size all need to be reported either internally or/also to the enforcing body. Some may require an in-depth investigation.

How do we prevent accidents?

There is an old saying: “accidents happen”. People do make mistakes and equipment can malfunction but much can be done to prevent accidents happening at all. Employers have a duty to effectively manage the working environment, their employees and those who may come into contact with their work, so that the likelihood of an accident occurring can be reduced to as low as reasonably practicable.

Risk assessment

In order to know what will harm employees and visitors, employers need to assess the risks associated with the work that is carried out. This exercise is invaluable, as it will help to identify the workplace hazards so that they can either be eliminated or controlled adequately. It is important to remember to review risk assessments after an accident as well as at regular intervals. Accidents may well highlight issues that were not considered previously.

Information, training and supervision

It goes without saying that adequately trained and well-informed employees are able to carry out their job roles more safely than those who lack knowledge. This, in turn, reduces the number of accidents in the workplace. Training must be specific to the associated risks but also the employee; it is unlikely that a finance officer will benefit from training in how to work safely at height. The same goes for senior management: it is important that they are trained in how they play a vital role in protecting workers.

Trained employees will ultimately display good safety behaviours, a sign of a healthy and positive safety culture. Training should be regular, and refresher training provided at the required intervals as practices and technology change.

Supervision is important in ensuring that incorrect and unsafe methods of work are picked up so that employees can be guided on corrective actions which will reduce the likelihood of them harming themselves or others.

Information can be relayed to employees by way of internal policies and procedures; one of the most important being the health and safety policy, in which an employer will state how it will manage safety and give detail to roles and specific health and safety responsibilities. Other documents will include procedures that detail how specific tasks are to be completed safely to prevent the likelihood of harm to the employee.

Safe equipment

All the training in the world cannot compensate for workplace equipment that is not in a safe working condition. A robust inspection and maintenance regime will ensure that equipment is checked and safe for use, which will reduce the likelihood of failure which can lead to an accident. Specific pieces of equipment may need to be maintained at set intervals and by a competent person; this must be taken into account. Employees can also be trained in how to inspect equipment — simple visual inspections can make a big difference. Personal protective equipment, although the last form of defence, can play a role in reducing the severity of an unwanted event.

Lessons learned

A notable way of preventing accidents from occurring is to take lessons from when they do happen. This reactive approach will not only assist in understanding how an event occurred but also highlight what remedial actions need to be implemented to prevent it from happening again, such as training, redesign of a work task or change in location.

For more detailed information, see your Accidents — Causes and Prevention topic.

Reporting accidents

All accidents should be reported using internal reporting systems. This enables an understanding of the immediate and root causes and any trends or patterns, which will aid the decision on what preventive measures are required. Depending on the severity, nature and amount of time an employee has off work due to their accident, it may need to be reported to the HSE under RIDDOR (the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013). Employers are legally required to report specific events such as fatalities and where an employee suffers a major injury or is incapacitated for more than seven consecutive days (not counting the day of the accident but including any weekends).

Accident reports inform risk assessments, inspections, audits, safety tours and sampling as they highlight the areas to focus on. Sometimes further investment is needed to ensure unwanted events do not occur.

Reporting also shows employees that their employer takes accidents and the prevention of accidents seriously. Where accidents are not reported and therefore not investigated, they are more likely to reoccur, leaving employees vulnerable to harm and lacking morale.

For more information and advice, including what should be reported on in relation to RIDDOR and who is responsible for making reports, see your Accident Reporting topic. It contains a detailed Line Manager Guide.

Accident investigation

Investigating accidents in the workplace is the only way that an employer can understand why an event occurred and how. Through the investigating period, employers will gain insight into what really happened as opposed to what is expected to happen, and whether employees are actually utilising the safe practices that they have been instructed to follow. The investigation is an opportunity to establish what else needs to be done and what could have been missed previously when assessing workplace risks.

Investigations should be carried out by those who are competent to so do, such as a manager with understanding of health and safety practices and the law, knowledge and experience on how to conduct an investigation — as well as knowledge of the work that was being undertaken. Investigators must be avoid placing blame on individuals and avoid bias. They must be given the necessary time and resources to complete the investigation and be able to report to a senior member of staff with the authority to make decisions on the recommendations made. Line managers, health and safety advisors and union and safety representatives can also carry out investigations.

For more information on what should be investigated and how, see your Accident Investigation topic.


Accident investigation is a reactive measure — obviously it would be better to have prevented the accident ever happening — but it has its benefits. Instigating preventive measures, or tweaking those in place following an accident will not only keep employers safer while at work but it will reduce the costs associated with accidents. The financial loss resulting from an accident takes away from areas that could have been improved with those funds, such as employee training, health and wellbeing, better equipment and better facilities.