UK Health and Safety at Work Act: Duties, Enforcement, Penalties

The Health and Safety at Work etc. Act 1974 is the principal law governing workplace health and safety in Great Britain, and it places legal duties on employers, employees, and the self-employed to manage risks at work. It is an enabling act, meaning ministers can make detailed regulations under it without passing fresh primary legislation, and it created the Health and Safety Executive (HSE) to enforce those duties. Breaches can lead to improvement or prohibition notices, unlimited fines, and in serious cases imprisonment.

What Employers Must Do

Section 2 sets the core obligation. Every employer must ensure the health, safety, and welfare of all employees so far as is reasonably practicable.¹ “Reasonably practicable” means weighing the severity of a risk against the cost, time, and difficulty of eliminating it. Where a risk is significant and the fix is affordable, the employer has no excuse. The law does not require unlimited spending to chase trivial hazards.

In practice, Section 2 covers safe equipment and systems of work, safe handling of hazardous substances, adequate training and supervision, a safe physical workplace including entry and exit, and welfare facilities such as clean drinking water and toilets. Section 3 extends the reach beyond the payroll: employers must run their business so that members of the public, contractors, and visitors are not put at risk either.² A construction firm must protect pedestrians walking past the site, not only the workers on it.

One feature of prosecutions under this Act catches employers off guard. Under Section 40, an employer charged with failing to do what was reasonably practicable must prove, on the balance of probabilities, that there was nothing more they could have done.³ The prosecution does not need to prove negligence. The burden sits with the defendant.

Written Policy and Risk Assessment

Any employer with five or more employees must prepare a written health and safety policy, keep it current, and bring it to the attention of every employee.¹ The document should say who is responsible for what and set out the practical arrangements the business uses to keep people safe. Inspectors check for it routinely.

Separately, the Management of Health and Safety at Work Regulations 1999 require every employer to carry out a suitable and sufficient risk assessment covering risks to employees and anyone else affected by the business.⁴ Businesses with five or more employees must record the significant findings in writing. The threshold counts heads, not full-time equivalents, and includes part-time, temporary, casual, and agency workers under direct supervision. Employers with fewer than five staff still have to assess risks; they just do not have to write it down.

What Employees Must Do

Workers are not passive under the Act. Section 7 places two duties on every employee: take reasonable care for your own health and safety and for that of anyone else affected by what you do at work, and cooperate with your employer on anything they need to do to comply with health and safety law.⁵ That means following procedures, attending required training, and using protective equipment as instructed.

Section 8 goes further. No person may intentionally or recklessly interfere with or misuse anything provided for health, safety, or welfare.³ Disabling a fire alarm, removing a machine guard, or tampering with emergency equipment can lead to prosecution. “Recklessly” does not require an intent to harm; knowing the risk and proceeding anyway is enough.

Personal Protective Equipment

Since April 2022, the Personal Protective Equipment at Work (Amendment) Regulations 2022 require employers to provide suitable PPE free of charge to all workers, not just employees.⁶ That includes agency staff, casual workers, and people on zero-hours contracts. The employer assesses what PPE the risk assessment calls for, trains workers in its use, and maintains or replaces it as needed. Workers must use the equipment as instructed and report defects.

Refusing Unsafe Work

If you genuinely believe your workplace poses a serious and imminent danger, you have the right to leave and refuse to return until the danger is resolved. Section 44 of the Employment Rights Act 1996 protects workers from being dismissed, disciplined, or docked pay for doing so.⁷ The protection was expanded in 2021 to cover all workers, including agency staff, part-time workers, and zero-hours contract holders.

The test is whether your belief in the danger was reasonable given what you knew and the resources available at the time. You do not have to wait for someone to be injured. An employer who retaliates faces an unfair dismissal claim with no cap on compensation.

The Self-Employed

Section 3(2) applies to self-employed people, but the scope was narrowed in 2015. If your work activities could pose a risk to other people, you must conduct your business so that you and anyone affected are not exposed to health or safety risks, so far as is reasonably practicable.² The 2015 regulations removed these duties entirely for self-employed people whose work does not risk harming anyone other than themselves and who do not work in a prescribed high-risk sector such as construction, agriculture, or gas installation.⁸ A freelance writer working from home sits outside the Act. A self-employed roofer does not.

Regulations Made Under the Act

Because the Act is an enabling statute, much of the day-to-day law sits in regulations made under its authority. Three come up constantly.

COSHH 2002

Where workers may come into contact with hazardous chemicals, dust, fumes, or biological agents, the Control of Substances Hazardous to Health Regulations 2002 impose a hierarchy. The first priority is to prevent exposure, ideally by substituting a safer alternative. Where that is not reasonably practicable, the employer must control exposure through engineering measures such as ventilation or enclosed processes, and only as a last resort rely on PPE.⁹ Employers must also monitor exposure levels, provide health surveillance where appropriate, and train employees on the risks and controls.

First Aid

The Health and Safety (First-Aid) Regulations 1981 require every employer to provide adequate first-aid equipment, facilities, and trained personnel so injured or ill workers receive immediate attention.¹⁰ “Adequate” depends on the employer’s needs assessment. A small, low-risk office might need only a stocked first-aid box and a designated person; a chemical plant may need trained first-aiders and a dedicated room. These rules apply to all workplaces regardless of size, including employers with fewer than five staff.¹¹

RIDDOR 2013

Certain incidents must be reported to the HSE. The duty falls on the “responsible person,” usually the employer. Reportable events include:¹²

Any death resulting from a work-related accident, reported immediately.
Specified injuries to workers, including fractures other than to fingers, thumbs, and toes; amputations; serious burns covering more than 10% of the body; crush injuries to the head or torso; loss of consciousness from head injury or asphyxia; and any injury likely to cause permanent loss of sight.
Over-seven-day incapacitation: if an employee cannot perform normal duties for more than seven consecutive days after an accident (not counting the day of the accident), report within 15 days.
Injuries to non-workers who are taken directly to hospital for treatment after being injured by a work activity.
Dangerous occurrences, meaning near misses with serious harm potential, such as scaffolding collapses, equipment contacting overhead power lines, or explosions that halt work for more than 24 hours.

Deaths and specified injuries must be reported without delay, typically by phone or online through the HSE’s system. Failure to report is itself an offence.

How the Act Is Enforced

HSE inspectors and local authority enforcement officers have wide powers under Sections 20 to 25. An inspector can enter any workplace at any reasonable time without notice, and at any time if they believe a situation is dangerous.³ On site they can take measurements, photographs, and samples, require answers to questions, and inspect or copy documents. Dangerous equipment can be dismantled or tested.

When an inspector identifies a breach, two main tools are available. An improvement notice requires the business to fix a specific problem within a stated deadline; the business can keep operating in the meantime. A prohibition notice stops an activity immediately where the inspector believes it poses a risk of serious personal injury, and the activity cannot resume until the risk is dealt with. A prohibition notice can be issued even if no law has technically been broken yet; the test is the risk of serious injury.

Fee for Intervention

If an inspector finds a material breach, the business gets a bill. Under the Fee for Intervention (FFI) scheme, the HSE recovers the cost of its time from the business that broke the law. From April 2026, the hourly rate is £188.¹³ The rate covers site visits, investigation, writing reports and letters, and follow-up work. A material breach is one serious enough for the inspector to notify you in writing, whether by a notification of contravention, an improvement notice, a prohibition notice, or a prosecution. Even a straightforward breach can produce a bill running into thousands of pounds once investigation time is added up.

Appealing a Notice

You can appeal an improvement or prohibition notice to an employment tribunal within 21 days of service. Tribunals enforce this deadline strictly and rarely grant extensions. Appealing an improvement notice suspends it until the tribunal decides, so you do not have to comply in the meantime. Appealing a prohibition notice does not automatically lift it; the dangerous activity remains halted unless the tribunal specifically orders otherwise. The tribunal can cancel the notice, uphold it, or modify its terms.

Penalties for Non-Compliance

Section 33 creates a range of offences for breaching health and safety duties. Maximum penalties are severe: unlimited fines for both organisations and individuals, and up to two years’ imprisonment for individuals convicted of certain offences on indictment.³ Courts sentencing organisations follow the Health and Safety Offences, Corporate Manslaughter and Food Safety and Hygiene Offences Definitive Guideline, in force since February 2016.¹⁴ Judges assess the offender’s culpability, the seriousness of the actual or potential harm, and the organisation’s turnover. A large company with high culpability and a death or serious injury can face fines reaching several million pounds for a single incident.

Personal Liability of Directors and Managers

Liability does not always stop at the company. Section 37 provides that if the offence was committed with the consent or connivance of a director, manager, secretary, or similar officer, or was attributable to their neglect, that individual is personally guilty of the same offence and can be prosecuted alongside the company.¹⁵ “Neglect” does not mean the director personally created the hazard. It means they failed to take reasonable steps to prevent it when they should have known about the risk. Directors convicted under Section 37 face the same penalties as any other individual, including imprisonment. The HSE has increasingly used this provision in recent years to hold senior leaders accountable where systemic failures trace back to boardroom decisions or inaction.

1
Legislation.gov.uk. Health and Safety at Work etc. Act 1974 – Section 2
2
Legislation.gov.uk. Health and Safety at Work etc. Act 1974 – Section 3
3
Legislation.gov.uk. Health and Safety at Work etc. Act 1974 – Contents
4
Legislation.gov.uk. Management of Health and Safety at Work Regulations 1999 – Regulation 3
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Legislation.gov.uk. Health and Safety at Work etc. Act 1974 – Section 7
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Legislation.gov.uk. Personal Protective Equipment at Work (Amendment) Regulations 2022
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Legislation.gov.uk. Employment Rights Act 1996 – Section 44
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Legislation.gov.uk. Health and Safety at Work etc. Act 1974 (General Duties of Self-Employed Persons) (Prescribed Undertakings) Regulations 2015
9
Legislation.gov.uk. Control of Substances Hazardous to Health Regulations 2002 – Regulation 7
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Legislation.gov.uk. Health and Safety (First-Aid) Regulations 1981
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Health and Safety Executive. Legislation
12
Health and Safety Executive. Types of Reportable Incidents
13
GovDelivery. Update to HSE’s Cost Recovery Hourly Rates
14
Sentencing Council. Health and Safety Offences, Corporate Manslaughter and Food Safety and Hygiene Offences
15
Legislation.gov.uk. Health and Safety at Work etc. Act 1974 – Section 37