All information in this blog has been researched from the Health and Safety Executive (HSE) and is for awareness purposes only. For guidance, visit the HSE website: https://www.hse.gov.uk/lone-working/
Introduction
When we think about workplace health and safety risks, images of heavy machinery, heights, confined spaces or slippy factory floors often come to mind. But one very significant risk is still too often overlooked: working alone. Lone working may seem benign in many cases, but the reality is that when things go wrong, the consequences can be much greater simply because there is no one nearby to help. This blog will explore why lone working is a major yet under-appreciated hazard in the UK workplace, what the legal responsibilities on employers are, how the risks stack up compared with other hazards, and how risk analysis and risk-ratings can and should be used to address the challenge.
What is “lone working”?
The HSE defines a lone worker as someone who works by themselves without close or direct supervision. HSE+2HSE+2
This might include people working at a fixed base alone (for example a retail outlet outside of normal hours), those working away from a fixed base (such as field engineers or visiting staff), or home-workers who have limited face-to-face contact. HSE+1
As the HSE says, “There will always be greater risks for lone workers without direct supervision or anyone to help them if things go wrong.” HSE+1
Why lone working is the most overlooked risk
Despite its prevalence, lone working often fails to attract the level of attention it deserves. Here are several reasons why:
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Routine nature & invisibility
Many people working alone do so as part of everyday operations – a cleaner late at night, a security guard on shift, a technician in a house call. Because it looks “normal”, the extra risk can go unnoticed.
Some commentary suggests there are between 7 and 9 million lone workers in the UK. CHAS+2hsepeople.com+2
When a hazard is everywhere, it can paradoxically get less visible. -
Same hazards, greater consequences
The HSE guidance clearly states that lone workers face “the same hazards at work as anyone else, but there is a greater risk of these hazards causing harm as they may not have anyone to help or support them if things go wrong.” HSE+1
In other words: the hazard may be the same (slips, manual handling, violence, illness) but the consequence is magnified due to isolation. -
Under-appreciation of “no immediate help” factor
Working alone means that even an otherwise modest incident (e.g., a slip on a wet floor) can escalate if the person cannot summon assistance. The time before help arrives is longer, rescue may be delayed, and the injury can worsen.
The HSE leaflet also says: “These responsibilities cannot be transferred to people who work alone.” ucu.org.uk
The message: simply because someone is working alone doesn’t absolve the employer of their responsibilities – the opposite in fact. -
Risk of multiple vectors
Lone workers may face hazards that combine: environmental (working in remote or isolated places), health-related (sudden illness), violence (especially staff working with the public), or welfare/hygiene issues (if working early/late hours alone). The HSE lists these explicitly. HSE
Because supervision is removed and support delayed, the risk of harm is effectively heightened.
Because of all the above, lone working should not be treated as a marginal or “nice to check” issue — it merits full, deliberate risk management.
Legal duties and employer liabilities under the Health and Safety at Work etc. Act 1974 (HSWA)
For employers in the UK, health and safety law places clear duties around the health, safety and welfare of employees. Key obligations include:
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Under section 2 of HSWA, it is the duty of every employer to ensure, so far as is reasonably practicable, the health, safety and welfare at work of all his/her employees. Wikipedia+1
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The duties include provision and maintenance of safe plant and systems of work; safe handling/storage/transport of articles and substances; provision of information, instruction, training and supervision; and safe access/egress. Wikipedia
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The act also covers non-employees (others affected by the work). Police Federation
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The duties cannot simply be transferred to the lone worker; even if someone is working alone, the employer remains responsible for assessing and controlling the risks. ucu.org.uk
In addition to HSWA, regulations such as the Management of Health and Safety at Work Regulations 1999 require employers to carry out risk assessments, organise and control health and safety, monitor and review the measures. Aberystwyth University+1
So what this means for lone workers:
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Employer must assess whether an employee will work alone, identify tasks and contexts where risk arises, and whether those tasks are safely done alone. Health and Safety Executive+1
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Employer must provide appropriate control measures (training, supervision, communication, emergency procedures) so that the worker is not left unsupported. HSE+1
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Employer must actively monitor and review the system of work for lone workers, not simply tick a box and forget.
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Failure to comply can lead to enforcement by the HSE, prosecutions, fines and potential corporate manslaughter charges in the event of death or catastrophic injury. SoloProtect
In short: the liability for employers is exactly the same for lone workers as for other workers — but the risk management must take into account the additional layer of “lack of help”.
Risk to lone workers: same hazards, higher consequence
One of the most compelling ways to understand why lone working is such a critical risk is to think in terms of “hazard” + “exposure” + “vulnerability”.
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Hazard: something that can cause harm (e.g., manual handling, falls, violence)
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Exposure: how likely is the person to encounter the hazard
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Vulnerability: how likely is the person to be harmed / how bad the outcome
For lone workers, the hazard may be the same as for other workers, and exposure may even be similar or lower. But vulnerability is significantly higher because of the lack of immediate assistance, the isolation, the potentially remote location, or the absence of supervision. The HSE summarises: “Lone workers face the same hazards at work as anyone else, but there is a greater risk of these hazards causing harm as they may not have anyone to help or support them if things go wrong.” HSE+1
Let’s look at some of the common hazard types the HSE flag for lone workers:
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Violence in the workplace (especially for those working late, in public‐facing roles or in isolated premises). HSE+1
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Stress and mental health or wellbeing issues (isolation, lack of support). HSE+1
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A person’s medical suitability to work alone (sudden illness, inability to summon help). HSE
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The workplace itself (for example in remote, rural or isolated locations) where help is not close by. HSE
Because of the “alone” element, even hazards that appear moderate can carry a higher chance of serious harm. For example: a slip in a corridor, while working alone late, may result in a fracture — but the worker cannot summon first aid or assistance quickly, the fall might aggravate into a more serious situation. Or a worker on a home visit may be subject to aggression and has no colleague nearby to assist or call for backup — increasing both physical risk and psychological trauma.
One case from HSE illustrates this: a 53-year-old gamekeeper working alone on a quad bike overturned the vehicle on a slope. He did not have a means of raising the alarm and was not found for 52 hours. The estate was fined for failing to provide a means of communication or monitor the absence. HSE
That demonstrates how the “alone” context magnified the outcome of what might otherwise have been a recoverable incident.
Therefore, it’s incorrect to think that because someone is working alone and the hazard is “routine”, that the risk is small. It is small only if the isolation and lack of help factor is addressed; neglect that, and the consequence rises.
Real-life examples
Here are some real examples drawn from HSE/case-study sources, illustrating how lone working can lead to serious harm when not managed:
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Gamekeeper on quad bike (agriculture): As mentioned, a temporary gamekeeper overturned a quad bike on a slope. He was working alone, had no means of raising the alarm, and was left for around 52 hours before being found. The employer was fined for failing to provide communication or a monitoring system. HSE
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Roofing company employee (working at height alone): A roofing worker fell nearly five metres and landed on a concrete patio, sustaining major injuries. The investigation found that he had been allowed to work alone, without proper planning, supervision or safe systems of work. Queen Mary University of London
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Laboratory worker chemical splash (out of hours alone): A late-night lab worker was working alone, clearing up a fridge storage area, mishandled a chemical bottle which broke, causing a splash to their face/eye. They were alone and unable to obtain immediate assistance for hours. The root causes: inadequate storage/housekeeping, inadequate procedures for out-of-hours work and lone working. Queen Mary University of London
These examples show how the lack of monitoring or supervision in lone working scenarios magnified the outcome. In each case, the employer either failed to assess the risk of alone-working in those contexts or failed to implement adequate control measures (communication, check-in, supervision, emergency procedures).
Risk analysis, risk assessment and ratings for lone workers
To effectively manage lone working, the same systematic risk analysis that applies to any other hazard must be used — only here the isolation factor must be built in.
Steps for a lone working risk assessment (drawing from HSE guidance and associated commentary):
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Identify who is a lone worker in your organisation: which job roles, which locations, which times (out-of-hours etc). HSE+1
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Identify hazards associated with that lone work: what tasks are being done, what environment, what interactions (public, clients, remote travel), what equipment. EcoOnline
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Assess the likelihood and severity of harm (this is the risk rating exercise):
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Likelihood: how probable is the incident happening? (e.g., the chance of aggression, or a slip, or a medical event).
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Severity: how bad would the outcome be? For lone working the severity tends to be higher because of isolation, so you may rate the same hazard as higher severity than for non-lone working.
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Identify existing controls: what is already in place (training, communications, check-in systems, welfare, welfare facilities, first aid).
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Identify additional control measures: what else needs to be done to reduce the risk to as low as reasonably practicable.
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Decide whether the task is safe to be undertaken alone – for some high-risk tasks the only safe control is “do not allow to work alone”. The HSE says for certain work, “high-risk work … requires at least one other person” (e.g., confined spaces, exposed live electricity conductors, diving operations). HSE
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Record the risk assessment (if you have five or more employees this is usually required) and ensure monitoring, review and revision. Health and Safety Executive+1
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Communication and training for the lone worker: ensure the worker knows how to raise the alarm, what to do in an emergency, how to report incidents, how to check-in. HSE+1
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Monitor the system: ensure check-in procedures work, communication devices operate, documentation is kept, and you review after incidents.
Risk ratings and prioritisation
Because the consequence for lone working can be higher, even if the hazard is moderate the overall risk may be higher than you’d initially think. For example, a task might have moderate likelihood but severe consequences because help is a long way away — meaning the risk rating should reflect “moderate likelihood × high severity” = high risk. That should then direct attention to mitigation, possibly eliminating the lone element or ensuring rapid help mechanisms.
In essence, lone working risk assessments require special consideration of both likelihood and availability of help or rescue. A failure in the “help” factor means severity goes up; accordingly control measures must either reduce likelihood or reduce isolation (improve help) or both.
Why employers must treat lone working seriously
Putting all of this together, there are compelling reasons for employers to elevate lone working risk management to the same level as other major hazards:
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Because the legal duty does not shrink simply because the worker is alone — the employer must still ensure, so far as is reasonably practicable, safety for that worker.
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Because the consequence of failure can be catastrophic (injury, illness, fatality) not simply because of the task but because of isolation after an incident.
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Because the risk exposure is often hidden or underestimated (the worker appears to be doing a standard job).
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Because regulatory enforcement and case law show that failure to properly manage lone working is already being prosecuted (see examples above).
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Because a robust system of check-ins, monitoring, communication, training and emergency response for lone workers is a mark of good health & safety culture, and neglect of it may reflect badly on an organisation’s overall approach.
In short: monitoring, training, clear procedures and reviewing control measures for lone workers is not optional—it is integral to meeting health and safety obligations and preventing avoidable harm. As HSE puts it: “As an employer, you must manage any health and safety risks before people can work alone.” HSE
Practical actions for managing lone working risk
Here are some key actions organisations should take:
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Identify all roles/purposes in the organisation where working alone happens (even occasionally).
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Carry out a lone-worker risk assessment for each role/context, including “what happens if things go wrong and no one is there”.
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Determine which tasks should not be done alone (i.e., where the only safe option is to have more than one person).
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Implement control measures such as:
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clear check-in / check-out procedures, and monitoring of worker status.
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reliable communication devices (phone, alarm, app) and back-up.
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training for lone workers in hazards, what to do in emergency, first aid, conflict resolution (if applicable).
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welfare arrangements for lone workers (e.g., rest, hygiene, secure premises, safe travel arrangements).
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supervision or periodic visits, and systems to ensure workers are safe at the end of shifts. The HSE mentions devices or agreed intervals of contact are useful. SafetyLine
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Prepare emergency arrangements: how does the lone worker summon help, how will the organisation detect non-check-in or alarm, what is the fallback plan.
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Review and monitor: The risk assessment must be kept up to date; after any incident it must be reviewed; changes in task, location, equipment or personnel must trigger review.
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For high-risk lone working contexts (remote site work, hazardous tasks), consider additional systems such as lone-worker alarms with “man-down” detection, GPS tracking, periodic welfare checks.
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Document policy and procedure: companies should have a lone working policy which sets out scope, roles, responsibilities, training, monitoring and review. A good guide to what to include is available via HSE‐related sources. VMG+1
Why this matters to your business and workforce
Let’s be clear: the focus here isn’t about instilling fear but about responsible risk management. If an organisation fails to manage lone working risks:
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The human cost can be high: a worker injured or ill and unable to summon help, or worse, fatality with all the attendant consequences for families, colleagues and morale.
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The financial cost can be substantial: fines, prosecution costs, insurance premium increases, lost time, reputational damage.
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The legal cost may include enforcement action by the HSE under the HSWA or related regulations, including potential corporate manslaughter in catastrophic cases. (See commentary on fines and legal penalties). SoloProtect+1
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The operational cost: if lone worker incidents occur, it may lead to stoppages, investigations, staff turnover, diminished trust.
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The ethical and cultural cost: if workers believe the organisation doesn’t care about their safety when working alone, it undermines safety culture, employee engagement and overall trust.
In other words, effective lone worker risk management is not just “nice to have” — it is essential.
Summary and conclusion
Working alone is not inherently wrong or unsafe – many roles will legitimately involve lone working. But what is not acceptable is to treat lone working as if it were the same as working in a team when it is not. The HSE’s message is clear: the hazard may be familiar, but the consequence of things going wrong alone is higher because there is often no immediate help, supervision or colleague support. That makes lone working the “most overlooked” risk in many workplaces.
Employers must treat lone working with the same seriousness as any other hazard: identify the hazard, assess the risk (with heightened awareness of isolation consequences), implement and monitor controls, provide training and support, and review periodically. The legal duties under the HSWA and other regulations apply equally to lone workers, and the inability to transfer the duty means employers must ensure they are not leaving their lone staff unprotected.
For any organisation, the question is not can someone work alone? but should someone work alone under these circumstances, and if yes, what assurance is there that they can do so safely, and if something goes wrong, how will we find out and respond?
In doing so, organisations will be reducing one of the most under-recognised and under-managed risks in the workplace, ensuring their workforce is safer, supported and looked after — whether or not they have colleagues nearby.
Further help and assistance
For full guidance from the HSE on lone working, see:
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HSE “Lone working: Protect those working alone” – employer guidance: https://www.hse.gov.uk/lone-working/employer/index.htm HSE
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HSE “Lone working: your health and safety” – general guidance: https://www.hse.gov.uk/lone-working/ HSE
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HSE booklet “Protecting lone workers: How to manage the risks of working alone” (INDG73) – https://www.hse.gov.uk/pubns/indg73.htm HSE
If your organisation employs lone workers (or is considering doing so), you may wish to contact a competent health & safety consultant or your HSE local office for advice on risk assessment and monitoring procedures.
Again, this blog is provided for information and awareness only. For full guidance and legal interpretation you should consult the HSE website and/or a qualified health and safety adviser. Thanks for reading.
