How Many Staff Need to Be First Aid Trained?

How Many Staff Need to Be First Aid Trained?

The most common version of this question sounds like: “We have 30 staff, so how many first aiders do we need?” And the honest answer is: it depends on more than headcount.

Under the Health and Safety (First-Aid) Regulations 1981, employers must provide first-aid equipment, facilities and personnel that are adequate and appropriate for the workplace. There is no universal ratio of employees to first aiders. The right level of cover comes from a proper first-aid needs assessment, not a formula copied from another business.

A school, a warehouse, a construction site and a small office may each have 30 staff. They will not all need the same first-aid provision.

For a broader employer overview, read our Workplace First Aid in the UK guide.

Need to book first aid training for your team? Prima Cura Training delivers in-house first aid training for employers, including Emergency First Aid at Work, First Aid at Work, Basic Life Support & AED, Paediatric First Aid and specialist training for life-threatening bleeding and anaphylaxis. Training is delivered at your workplace or chosen venue across Manchester, Greater Manchester, the North West and the wider UK.

Does UK law set a fixed number of first aiders?

No. There is no legal ratio of first aiders to employees, no minimum headcount and no universal rule. The Health and Safety (First-Aid) Regulations 1981 require employers to provide adequate and appropriate provision, and what that means depends on your specific circumstances.

HSE first aid guidance is clear that the level of provision should be based on a first-aid needs assessment covering your workplace type, the work carried out, hazard levels, staff numbers, shift patterns, location and how quickly emergency services can reach you.

If you find a table online that says “1 first aider per 50 employees”, treat it as a starting point for thinking, not a legal standard. Those ratios do not account for your specific workplace, your shift patterns, or whether your one first aider is actually there when something happens.

What is the minimum first-aid provision at work?

HSE guidance states that the minimum provision on any work site includes a suitably stocked first-aid kit, an appointed person to take charge of first-aid arrangements, and information for employees about those arrangements.

For a very small, low-risk workplace with few staff and simple working patterns, that may be sufficient. But once you add more people, higher-risk tasks, shift work, multiple floors, lone workers or regular visitors, the case for at least one trained first aider becomes considerably stronger.

Many employers who technically only need an appointed person still choose to train staff. Cardiac arrests, severe allergic reactions and serious accidents do not observe risk categories. Having someone who can respond while the ambulance travels makes a real difference.

For HSE guidance on what your kit should contain, read our blog on what should be in a workplace first aid kit.

What is a first-aid needs assessment, and why does it matter?

A first-aid needs assessment is the process employers use to decide what equipment, facilities and trained personnel they need. It should be specific to your workplace, realistic and reviewed whenever things change significantly.

The assessment should look at:

• The nature of the work and the hazards present
• Staff numbers, shift patterns and lone or remote workers
• The workplace layout, including multiple floors, buildings or separate sites
• Accident and near-miss history
• How far away are the nearest emergency services likely to be
• Whether visitors, clients, pupils or members of the public come onto the premises

HSE L74 (First Aid at Work: Guidance on Regulations) was updated in 2024 to specifically include employee mental health in first-aid needs assessment. The 2024 edition also updated guidance on life-threatening bleeding, reflecting the recognition that response speed in those situations is critical.

Getting the needs assessment right matters because it protects your staff and gives you a documented, defensible basis for your first-aid arrangements. It is also the foundation for every decision on this page.

If you want to think more broadly about how first aid training fits into your overall staff development, our Training Needs Analysis guide walks through how to approach that process.

How many first aiders might your workplace need? A practical guide by workplace type

This table is not a legal formula. It gives practical guidance to help employers think through first-aid requirements in line with HSE guidance. Your own needs assessment determines the final provision.

Workplace / risk factor	Recommended approach and relevant training
Low-risk, small or simple workplace Examples: small offices, small retail, low-risk professional workplaces.	Consider whether an appointed person and a stocked first-aid kit are sufficient, or whether staff would be safer with at least one trained first aider. Serious incidents can occur in any workplace regardless of risk category. Many employers in this bracket choose to train because it costs far less than managing the consequences of being unprepared. Relevant options: Emergency First Aid at Work and Basic Life Support & AED.
Low-risk but larger or more spread-out workplace Examples: larger offices, multi-floor premises, larger retail teams, hybrid working environments.	Think about floors, buildings, working patterns, annual leave cover and whether one trained first aider can reach every part of the workplace in time. A single first aider covering two floors or a building with distant departments is often not enough in practice. Relevant options: Emergency First Aid at Work, First Aid at Work and Blended First Aid at Work.
Higher-risk workplace Examples: warehousing, construction, manufacturing, food production, machinery, engineering or maintenance.	More varied potential injuries make the case for first aiders with broader skills. Consider whether cover is needed across multiple departments, shifts or sites, and whether your trained staff numbers account for absence as well as presence. Relevant options: First Aid at Work, First Aid at Work Requalification and EFAW + Life-Threatening Bleeding.
Workplace with foreseeable life-threatening bleeding risk Examples: machinery, cutting tools, glass, metalwork, construction, agriculture, events or security roles.	If life-threatening bleeding is a foreseeable risk, employers should consider dedicated additional training and appropriate equipment alongside standard first-aid provision. Response time in these situations is critical. Relevant options: EFAW + Life-Threatening Bleeding and First Aid at Work.
Schools and education settings Examples: schools, colleges, wraparound care, holiday clubs, education teams.	Workplace first-aid duties sit alongside the practical need to respond to pupils, staff and visitors. Education-specific scenarios are a useful addition to standard content, and schools with pupils who have known medical needs should factor those in too. Relevant options: Emergency First Aid for Schools, Emergency Paediatric First Aid and Paediatric First Aid.
Early years settings Examples: nurseries, reception classes, childminders, pre-schools and early years providers.	Early years providers must meet both workplace first-aid duties and the requirements of the EYFS statutory framework, which requires at least one paediatric first aider on the premises or with any outing group at all times. Relevant options: 2-Day Paediatric & Early Years First Aid, Blended Paediatric First Aid and Emergency Paediatric First Aid.
Workplace with known allergy risk Examples: schools, care settings, hospitality, food production and public-facing venues.	Consider whether staff need specific awareness of anaphylaxis, emergency response and adrenaline auto-injectors, including newer devices such as nasal epinephrine. Anaphylaxis can occur in any setting, but the risk is higher where food is prepared or served and where pupils or service users have known allergies. Relevant option: Anaphylaxis Awareness.
Workplace with AEDs or cardiac risk considerations Examples: offices, gyms, community venues, care settings, schools, public-facing workplaces.	AED awareness is included in standard workplace first aid syllabuses, but focused BLS and AED training makes a measurable difference to staff confidence and speed of response when it counts. Relevant option: Basic Life Support & AED.

Which first aid course is right for your workplace?

Once your needs assessment is done, the course choice usually follows naturally. Here is a guide to the options Prima Cura Training delivers.

Not sure whether EFAW or FAW is right for your business? Read our FAW vs EFAW guide for a detailed comparison of the two qualifications.

One thing worth flagging here: fully online first aid courses do not meet the legal requirement for workplace first aid training. Practical skills must be assessed in person. Read our blog on why online first aid training is not compliant for the full explanation.

Emergency First Aid at Work: A one-day qualification and the most common option for lower-risk workplaces. Covers core emergency responses including CPR, AED awareness, choking, severe bleeding and unconsciousness.

First Aid at Work: A three-day qualification covering a broader range of injuries and illnesses. Better suited to higher-risk workplaces or where first aiders need to handle a wider variety of situations.

First Aid at Work Requalification: For existing FAW certificate holders renewing before their three-year qualification expires.

Blended First Aid at Work: Theory completed online in advance, practical skills assessed face to face. Works well for teams that cannot take full consecutive days away from the business.

Emergency First Aid at Work + Life-Threatening Bleeding: EFAW content plus specific skills for responding to severe haemorrhage. Relevant where machinery, cutting tools or other hazards create a foreseeable bleeding risk.

Basic Life Support & AED: Focused CPR and defibrillator training, aligned with the Resuscitation Council UK 2025 Guidelines. A strong option for teams that want genuine confidence in cardiac arrest response.

Emergency First Aid for Schools: Designed for school staff, with scenarios and content that reflect the education environment.

Emergency Paediatric First Aid: For staff who need emergency first aid skills for babies and children, delivered in a single day.

2-Day Paediatric & Early Years First Aid: The full paediatric first aid qualification for early years settings, meeting the requirements of the EYFS statutory framework. Ofsted-recognised.

Blended Paediatric First Aid: A flexible route to the paediatric first aid qualification, with e-learning theory and in-person practical assessment.

Anaphylaxis Awareness: Additional awareness training for workplaces where food allergy or anaphylaxis risk is present, including updated content on adrenaline auto-injector devices.

First aid courses are capped at 12 learners to meet accreditation requirements and ensure everyone gets hands-on practice time. If you are sending a large team, you may need to book more than one session. Our blog on why first aid courses are capped at 12 learners explains why the cap exists and what it means for your planning.

Not sure which course fits? Get in touch, and we will talk it through.

Does every workplace need a trained first aider?

Not necessarily. Some very small, low-risk workplaces may be adequately covered by an appointed person and a stocked kit. The needs assessment decides.

That said, many employers in that bracket still choose to train at least one person because serious incidents do not observe risk categories. Having someone on site who can respond while the ambulance is on the way is rarely a decision anyone regrets. The question worth asking yourself is whether you would be comfortable relying entirely on 999.

Appointed person or first aider: what is the difference?

An appointed person manages first-aid arrangements. They look after the kit, call emergency services when needed and make sure staff know what to do. They do not need a first aid qualification.

A first aider has completed formal training and holds a recognised certificate. HSE guidance on first aid at work explains that Emergency First Aid at Work prepares someone to give emergency care for injuries and illness at work, while First Aid at Work covers that plus a broader range of conditions.

The distinction matters because if your needs assessment says trained cover is required, an appointed person alone does not satisfy that requirement. It is not a like-for-like swap.

Can one first aider cover the whole workplace?

Sometimes, but it is far less common than employers assume. For a very small, single-location, low-risk workplace where everyone works the same hours, and the building is compact, one first aider can work.

For most workplaces, one person is not enough. Can they physically reach every area quickly? What happens when they are on a different floor, out at lunch, working from home, or away on a course?

The practical test is this: if something happened right now, could a suitable person get there in time, with the right kit, while your team is actually at work?

From practice: One of the most common gaps I see when I work with employers on first-aid planning is a large site with 40, 50 or more staff, and just one or two people trained. The box is ticked and it looks fine on paper. What nobody has thought through is what happens when that first aider is off with a bad back, has two weeks in Tenerife booked, or hands in their notice and walks out the door. The cover disappears overnight and the employer often does not realise until someone asks. Training two or three people instead of one is not a significant cost increase. But it is the difference between provision that holds up in practice and provision that only works on the org chart.

What if your first aider is off sick or on annual leave?

You need a plan, because it will happen. HSE guidance specifically tells employers to account for both planned and unplanned absences when deciding how many people to train.

This is the single most common reason employers end up training more than one person, even in relatively simple workplaces. Annual leave, sickness, remote working days and training days all create gaps. If your first-aid provision depends entirely on one person being in the building, it is considerably more fragile than it looks.

A good rule of thumb: train enough people that you still have cover if one of them is unavailable at any given time. For many workplaces, that means a minimum of two, and often more, once you factor in shifts and site layout.

Does first-aid cover change for shift workers?

Yes. First-aid provision must be available whenever people are at work, whether that means early mornings, evenings, nights, weekends or rolling rotas. A first aider who works standard office hours provides no cover for anyone outside those times.

If your organisation runs multiple shifts, your needs assessment must address cover across all working patterns, not just the most convenient ones.

Do you need first-aid cover for visitors, clients or the public?

The Health and Safety (First-Aid) Regulations 1981 focus on employees, but HSE strongly recommends that employers include non-employees in their needs assessment. That includes customers, visitors, pupils, service users, contractors and members of the public.

For schools, early years settings, care providers, hospitality venues, gyms, community spaces and public-facing workplaces, this is not a minor consideration. The people most likely to need first aid on your premises are not always the people on your payroll.

Should mental health be included in first-aid planning?

HSE L74 (2024) now explicitly includes mental health as part of the first-aid needs assessment. That does not mean physical first aid and mental health first aid are interchangeable, because they are not.

What it means is that employers should consider whether staff are prepared to provide initial support, reassurance and appropriate signposting if a colleague or service user experiences a mental health episode at work. Whether further training is appropriate depends on the nature of the workplace.

How long do first aid certificates last?

Workplace first aid certificates are valid for three years. Employers are responsible for arranging retraining before certificates lapse, because an expired certificate means the first aider no longer satisfies the legal requirement.

HSE also strongly recommends annual refresher training during that three-year period. First aid skills are perishable. Without regular practice, confidence drops, and the gaps show at exactly the moment they matter most.

What extra first aid training might be needed for specific workplace risks?

Some workplaces need provision beyond the standard qualifications. When a foreseeable hazard falls outside a standard course syllabus, additional training is often the right response. Common examples include:

• Life-threatening bleeding from machinery, cutting tools, glass, metalwork or agricultural equipment
• Anaphylaxis risk in food environments, schools, care settings or hospitality venues
• Paediatric response skills for early years settings, schools and childcare teams
• AED confidence in workplaces with defibrillators on site or a higher cardiac risk profile
• Remote or lone worker situations where standard emergency response times do not apply

HSE guidance says employers should tell their training provider about specific hazards so that provision can be planned appropriately. If you are not sure whether your workplace needs additional training, speak to us, and we will work through it with you.

How do you know whether a first aid training provider is credible?

Not all first aid training is equal. Employers have a legal responsibility to ensure training is suitable, and that means knowing what to look for before you book. Our guide on how to verify a first aid training provider covers exactly what HSE expects employers to check, including accreditation, awarding bodies and quality standards.

Prima Cura Training holds accreditation with FAIB, Qualsafe, CPD Assessed and WorkSafe. All courses are delivered by experienced trainers with real-world health and safety and social care backgrounds.

Book first aid training for your team

Prima Cura Training delivers practical in-house first aid training for employers, with sessions at your workplace or a location that suits your team. We work with care providers, schools, early years settings, construction teams, hospitality businesses, corporate offices and public-facing organisations across Manchester, Greater Manchester, the North West and the wider UK.

If you know what you need, choose from the courses below. If you are not quite sure, get in touch, and we will talk it through.

• Emergency First Aid at Work
• First Aid at Work
• First Aid at Work Requalification
• Blended First Aid at Work
• Emergency First Aid at Work + Life-Threatening Bleeding
• Basic Life Support & AED
• Emergency First Aid for Schools
• Emergency Paediatric First Aid
• 2-Day Paediatric & Early Years First Aid
• Blended Paediatric First Aid
• Anaphylaxis Awareness

For the full employer overview, read our Workplace First Aid in the UK guide.

Frequently asked questions

This page provides general information for UK employers and does not replace your own first-aid needs assessment, legal advice or sector-specific regulatory guidance. Employers remain responsible for deciding what provision is adequate and appropriate for their workplace. For authoritative guidance, refer directly to HSE, the Health and Safety (First-Aid) Regulations 1981, and any sector-specific requirements that apply to your organisation.