What Are Safety-Critical (Fit to Work) Medicals?

The term ‘safety-critical work’ is defined as "any task identified by risk assessment that could result in harm to the individual worker and to other employees and third parties should the individual worker experience incapacity".

Why Do I Need A Safety-Critical Medical?

Most construction sites require workers to demonstrate that they are medically fit and safe to work there and ask employees and contractors for a valid safety-critical medical (sometimes referred to as 'fit to work') certificate. The medical assesses the health of those undertaking high risk activities, in high risk environments, or conducting an activity where their health could have a critical impact on the safety of the individual or others.

Under Health and Safety legislation, employers have a duty of care to safeguard the health and safety of their employees. Ensuring your employees don’t have any health conditions or medication that could cause a sudden loss of consciousness or incapacitation whilst working, helps reduce this risk in high-risk environments, such as construction sites, where there is more potential to cause significant harm.

What Do Safety-Critical Medicals Involve?

Our medicals ensure that the requirements of appropriate industry standards are met.

Our safety-critical medicals include:

  • Eyesight
  • Hearing test
  • Blood pressure
  • Lung function test (where appropriate)
  • Mobility assessment
  • General health questionnaire/discussion
  • Urinalysis (where appropriate)

Employees should bring with them photo ID (work ID, driver’s licence or passport), glasses and current prescription, and a list of current medication.

Confined Spaces Medical

A confined space is a small area that is large enough for workers to enter and perform certain jobs but not necessarily designed for people to work in for prolonged periods. A confined space also has limited or restricted means for entry or exit. A confined space medical aims to identify if there are any underlying health conditions that could cause sudden loss of consciousness, balance or incapacitation to enable the worker to work safely in confined space. A confined space medical involves similar tests as a safety-critical medical.

Working at Heights Medical

If you have staff working at height where they could fall and injure themselves, we can help you determine if they are medically fit to do their job. This would include those that work on platforms such as scaffolds, cherry pickers or scissor lifts, as well as those who work on room, piece of plant or equipment or use ladders or step ladders. A working at heights medical aims to identify if there are any underlying health conditions that could cause sudden loss of consciousness, balance or incapacitation to enable the worker to work safely at height. A working at heights medical involves similar tests as a safety-critical medical.

Drivers Medical

Safety whilst driving is important to protect both the driver and members of the public. We provide drivers’ health assessments for all types of occupational driving, including fork-lift trucks, cherry pickers and other heavy plant. A driver’s medical aims to identify if there are any underlying health conditions that could cause sudden loss of consciousness, or incapacitation to ensure the worker is safe whilst driving at work. A driver’s medical involves similar tests as a safety-critical medical.

Book an appointment

Night Worker Health Assessment

The Working Time Regulations 1999 state that those considered as night workers should be offered a health assessment on a yearly basis. A night worker is an individual who undertakes a large proportion of their work at night. The health assessment is to identify if an individual has a health condition that could be made worse by night working and may need some adjustments, or to identify if a worker’s health is being adversely affected by night work so that appropriate measures can be put in place to reduce this risk. The assessment involves completion of a questionnaire with telephone or video follow-up where required.


I’ve known Debbie ever since I started my business over eight years ago. Whenever I’ve needed occupational health support, Debbie is right there for me. She has never let me down and everything she has done for me has been of the highest quality. Her professionalism and understanding of the subject is second to none and I have no hesitation whatsoever in recommending her services to anyone that needs an occupational health service.

Stuart Falconer, HR Consultant, Morgan Thomson HR

I have worked with Debbie on a number of occasions and she has become my ‘go to’ occupational health advisor. She is both professional and pragmatic, builds a great rapport with employees and employers alike and produces reports in quick time. Quite simply, the best OH advisor I have worked with.

Jon Phillips, HR Consultant, Calium HR

SA Law has enlisted the expert assistance of Debbie Holder for occupational health support over a number of years on behalf of numerous clients. We have always found her to be approachable and helpful in what can often be very difficult circumstances for our clients. Her advice is timely, comprehensive and comes at a very reasonable fee when compared with a number of other occupational health providers. We would have no hesitation in recommending her services to others.

Chris Cook, Partner, Head of Employment and Data Protection, SA Law

Debbie is our trusted advisor for OH matters and we regularly refer our clients to her. Debbie’s approach means her advice and reporting is always clear and concise and has really helped our clients navigate some tricky situations. We wouldn’t hesitate to recommend Debbie and Occupational Health Services.

Chris Miles, Assistant Manager, People Solutions, Menzies LLP

I have used Occupational Health Services for a range of employee health matters. I find the service very responsive, flexible, medically sound and professional taking into consideration both the employees’ and employers’ situation. The reports are detailed to a high standard to allow the business to review possible support and the next steps with the employee and Occupational Health Services will always advise if a further assessment may be needed.

Leanne Taylor, HR Consultant, Beststart HR

After working with a variety of occupational health providers over the years, I have never worked so closely with a provider who genuinely cares about our colleagues but also about our business. Occupational Health Services Ltd understand our business and spend time to understand our colleagues too. They are always at the end of a phone to give advice, support and give confidence to colleagues working with them for the best outcomes for all.

Linsay Baverstock, People Partner, Settle Group

Debbie has been assisting us with all of our OH needs since 2015 and I can honestly say nothing is too much trouble, quick turnaround if needed, with excellent professional assessments and advice given. Would recommend.

Michelle Bolino, Head of HR, Selectaglaze Ltd, St Albans

Occupational Health Services Ltd has greatly assisted many of my clients and their staff in assessing health issues and providing helpful guidance on road maps to improved health and attendance.

Philip Delafield, HR Consultant, Delafield Consulting ltd

We have worked with Occupational Health Services Ltd for eight years now and the service Debbie has provided has been excellent. She always responds to us within a few hours and is very accommodating to our needs. We feel really confident that our employees will have a positive experience with Debbie, even at a time when perhaps they are not positive themselves. As an employer with a relatively lean head count, we do not feel compromised or exposed with the advice Debbie provides to employees, and instead, take real benefit about how best to return employees to full health in the workplace. Would highly recommend.

Pete Howitt, HR Director, ADR Network