Principles of Risk Assessment
Principles of Risk Assessment
Learn it. See it on site. Try it. Check it.
A rich learning book about how risk is recognised, assessed, controlled and reported on construction sites.
From planned risk assessment to changing site conditions
You will build the knowledge needed to recognise hazards, understand risk, use risk assessments and method statements, learn why accidents happen, report incidents correctly and respond when site conditions change.
Why do we assess risk?
Risk assessment is not paperwork for its own sake. Its purpose is to help people decide what could cause harm, who might be harmed, what controls are needed and whether the work can proceed safely.
Prevent harm
Identify hazards before someone is injured or made ill, then put sensible controls in place.
Plan the work
Decide what equipment, people, supervision, access and controls are needed before the task starts.
Communicate clearly
Give workers a shared understanding of the risks and the precautions expected on site.
What the two documents are really for
A risk assessment and a method statement support the same aim — preventing harm — but they answer different questions. Understanding the difference helps you cope with exam scenarios that do not use the exact examples in the activities.
Risk assessment: identify and control
A risk assessment looks for hazards, considers who might be harmed and how, evaluates the level of risk and decides what controls are needed. Its purpose is to prevent injury and ill health by making sensible decisions before work starts and whenever conditions change.
- What can cause harm?
- Who could be affected — workers, visitors, other trades or the public?
- How serious could the harm be and how likely is it?
- What controls are already in place and what more is needed?
- When should the assessment be reviewed?
Method statement: explain the safe method
A method statement describes how the work will be carried out safely. It normally turns the conclusions of the risk assessment into an organised sequence that workers can understand and follow.
- safe order of work and access arrangements
- people, competence and supervision required
- plant, tools, materials and PPE/RPE needed
- controls, exclusion zones and communication
- what to do if the job or conditions change
What should a risk assessment achieve?
Why assess risk?
Select the three reasons that best explain why a risk assessment is useful before work starts.
Risk assessment and method statement: different jobs, same goal
Risk assessment
Identifies hazards, considers who could be harmed, evaluates the risk and decides what controls are needed.
Main question: What could go wrong, and how do we control it?
Method statement
Explains the agreed safe way of carrying out a particular task, usually in a logical sequence with the required controls.
Main question: How will we actually do this job safely?
Risk assessment or method statement?
Which document does what?
Sort each statement into the document it most directly describes.
Acronym builder: RAMS
Build RAMS
Use the word bank to build the common construction acronym. Spare words are included.
Can you distinguish the purpose of the two documents?
Independent check: a new excavation is planned
The supervisor has a generic risk assessment but no agreed sequence for how the excavation support, access and spoil placement will be managed. What is missing?
What does the law require from a risk assessment?
The Management of Health and Safety at Work Regulations 1999 require employers to assess risks arising from their work. In construction, health and safety law also applies to self-employed construction work. The assessment must be suitable and sufficient.
Assess the real work
Consider employees and anyone else who could be affected by the activity.
Record significant findings
If an employer has five or more employees, the significant findings must be recorded.
Review when needed
Review controls when they may no longer be effective, after significant change, or when incidents reveal a problem.
Legal requirements: what is required, and what is good practice
The exam may test whether you can separate a genuine legal duty from a useful site practice. The safest answer is precise: risk assessment is a legal requirement; a written method statement is a common way of describing a safe system of work but is not universally demanded by one single regulation for every task.
Suitable and sufficient risk assessment
Under the Management of Health and Safety at Work Regulations 1999, employers must make a suitable and sufficient assessment of risks to employees and to others who may be affected by the work. The assessment should be proportionate to the risk and detailed enough to identify the precautions that are really needed.
Recording and review
Where an employer has five or more employees, the significant findings must be recorded. The assessment must be reviewed when there is reason to believe it is no longer valid or when there has been a significant change. The record is useful only if the controls are actually implemented.
Safe systems and construction planning
The Health and Safety at Work etc. Act 1974 and construction legislation require work to be planned, managed and carried out safely. A method statement is widely used to communicate how controls will be put into practice, especially for complex or higher-risk work. Some specialist work has specific written-plan requirements.
Workers still have duties
Employees must take reasonable care of themselves and others, cooperate with their employer, follow information and training, and use safety arrangements correctly. Signing a RAMS document is not enough if the agreed method is then ignored.
From hazard spotting to action
A practical risk-assessment cycle
Record the things that matter
What belongs in the significant findings?
Select four items that a useful recorded risk assessment should capture.
A risk matrix is a decision aid — not a legal formula
Many sites use a simple matrix to help rank risk. A common approach gives separate scores for likelihood and severity, then combines them. The law does not prescribe one universal matrix — the important point is that the assessment is suitable for the real risk.
Use the matrix rather than guess
Risk-rating practice
A hazard is assessed as likelihood 3 (possible) and severity 4 (major). Using the example matrix taught on the previous page, what risk score is produced?
Choose controls in the right order
When controls are chosen, stronger controls should be considered before relying on the worker to “be careful”.
Put stronger controls first
Build the control order
Arrange these control approaches from strongest to weakest.
What makes a useful method statement?
Method statements are widely used in construction to turn the conclusions of risk assessments into a clear safe system of work.
Scope & sequence
What work is being done, where, and in what order.
Resources & controls
Plant, equipment, materials, access arrangements and control measures.
People & emergency arrangements
Who is responsible, what supervision is required and what happens if something goes wrong.
Build the safe-system picture
Match the method-statement element to its purpose
Correct pairs stay green.
Can you separate legal requirement from good site practice?
Independent legal check
Select the four statements that are accurate.
Common causes of fatal harm
HSE statistics change year by year, but the recurring accident types are familiar. Recent Great Britain data continues to show falls from height, moving vehicles, moving objects and collapse/overturning among the main kinds of fatal workplace accident.
Falls from height
Roof edges, scaffolds, ladders, openings and fragile surfaces can turn one mistake into a fatal fall.
Vehicles & moving objects
Reversing plant, site vehicles, swinging loads and falling materials can strike or crush people.
Collapse & machinery
Excavations, structures or stacks can collapse; moving machinery can trap, cut or crush when controls fail.
Recognise the event that causes the harm
City & Guilds asks for common causes of work-related fatalities and injuries. Learn the accident mechanisms, not just one set of examples, because an exam question may describe the event rather than name it.
Falls from height
Falls from roofs, scaffolds, ladders, platforms, edges and openings can cause fatal or life-changing injury. Construction remains a sector where fall prevention is a major priority.
Moving vehicles and plant
Workers can be struck, run over or crushed by reversing or slewing plant, delivery vehicles and mobile equipment, especially where pedestrian and vehicle routes mix.
Falling or moving objects
Materials, tools, loads and components can strike people. Collapse of excavations, structures or stacked materials can trap or crush workers.
Machinery, tools and electricity
Contact with moving machinery, poorly guarded equipment, electrical services or unsuitable tools can cause severe injury or death.
Slips and trips
Poor housekeeping, trailing leads, uneven surfaces, waste and wet ground frequently cause non-fatal injury and can also trigger a more serious secondary event.
Manual handling and overexertion
Lifting, carrying, pushing, pulling and repetitive handling can cause strains and musculoskeletal injury. A single awkward event can injure; repeated exposure can also build damage over time.
Common routes to non-fatal injury
Non-fatal injury is far more common than fatal injury. HSE data repeatedly highlights slips and trips, handling/lifting/carrying, being struck by moving objects and falls as major causes of injury.
Slips, trips & falls
Poor housekeeping, uneven ground, trailing materials and contaminated surfaces can cause fractures and sprains.
Handling injuries
Awkward lifting, carrying, pushing and pulling can injure backs, shoulders, hands and lower limbs.
Objects, tools & equipment
Contact with moving or falling objects can cause cuts, fractures, crush injuries and eye injuries.
Recognise the accident mechanism
Match the accident kind to the site example
Pair each accident kind with the clearest construction example.
Accident kind or longer-term health risk?
Identify common accident kinds
Select five accident kinds. The other options are important health risks, but they are not accident kinds.
Can you connect the event to the underlying control failure?
Independent check: one incident, several causes
A worker is struck by a reversing telehandler in an area where pedestrians and vehicles share the same route. Which answer best identifies the immediate accident kind and an important contributory failure?
The human cost of getting it wrong
Failing to prevent accidents and work-related ill health can change a person’s life. The effect may be immediate, or it may develop after months or years of exposure.
Pain, disability & illness
Injuries may lead to long-term pain or loss of mobility. Health exposures can cause chronic respiratory, skin, hearing or vibration-related conditions.
Family & wellbeing
Loss of income, caring responsibilities, stress and reduced quality of life can affect far more than the injured worker.
Lost confidence
Workers may become anxious about returning to the task or workplace after a serious event.
The consequences spread far beyond the injured person
Failure to prevent accidents and ill health creates human, legal, financial and operational consequences. Long-term health damage can be just as serious as an immediate accident even when the harm is not visible on the day.
Human consequences
- pain, disability, reduced quality of life or death
- stress and trauma for colleagues, witnesses and families
- loss of income or ability to continue a trade
- long-latency disease that appears years after exposure
Workplace consequences
- work stops while the incident is dealt with and investigated
- experienced workers may be absent and schedules disrupted
- equipment, materials or structures may be damaged
- morale can fall if workers lose confidence in site controls
Legal and enforcement consequences
- investigation by the enforcing authority
- improvement or prohibition notices
- prosecution and fines where offences are proved
- civil claims may follow separately from criminal enforcement
Business consequences
- lost time, replacement labour and investigation costs
- higher insurance or uninsured losses
- rework and delayed completion
- damage to reputation and future work opportunities
The wider cost to the job and the organisation
The consequences also spread through the organisation and the project.
Legal & enforcement
Regulators may investigate, issue notices or prosecute where legal duties have not been met.
Financial
Lost production, sick pay, replacement labour, claims, damaged equipment and insurance costs can all increase.
Operational & reputation
Work may stop, programmes slip, morale falls and clients may lose confidence in the organisation.
See how one event spreads
Sort the consequences
Place each consequence into the area it most directly affects.
Follow the chain before it becomes harm
Scenario: the warning signs were ignored
Three near misses involving falling materials were reported but no change was made. A week later a worker is seriously injured. What is the strongest lesson?
Can you see the full impact?
Independent check: implications
Select four realistic implications of failing to prevent accidents and ill health.
Accident, near miss and hazard
Five words appear again and again in health and safety. Using them precisely makes risk discussions clearer and helps workers understand what action is needed.
Accident
An unplanned event that results in injury, ill health or other harm.
Near miss
An event that did not cause injury or harm, but had the potential to do so.
Hazard
Something with the potential to cause harm.
Use health-and-safety language precisely
Several words that sound similar have different meanings. In multiple-choice questions, one word can change the correct answer, so learn the concept rather than memorising a sentence.
| Term | Meaning | Construction example |
|---|---|---|
| Hazard | Something with the potential to cause harm. | An unguarded floor opening, silica dust, a moving excavator. |
| Risk | The chance that harm will occur together with how serious that harm could be, in the circumstances of the exposure. | A worker walking beside an unguarded opening may fall and suffer severe injury. |
| Accident | An unplanned event that results in injury, ill health, damage or loss. | A worker trips over waste and fractures a wrist. |
| Near miss | An unplanned event that did not cause injury or damage this time but had the potential to do so. | A brick falls from a scaffold and lands beside a worker. |
| Competence | Having the necessary skills, knowledge, training and experience — and being able to apply them safely to the task. | A trained worker who understands the equipment, its limits and the safe system and can use it correctly. |
Hazard and risk are related — but not identical
Hazard
The source of potential harm.
Example: an unguarded floor opening.
Risk
How likely harm is, together with how serious that harm could be.
Example: the chance that someone falls through the opening and suffers a serious injury.
Separate the source from the outcome
Hazard or possible harm?
Sort each statement into the source of harm or the possible outcome if it is not controlled.
What does competence really mean?
Competence is more than holding a card or attending a course. HSE describes it as a combination of training, skills, experience and knowledge — plus the ability to apply them safely.
Proportionate
The level of competence needed depends on the risk and complexity of the task.
Applied
Knowing the rule is not enough; the person must be able to recognise risk and use the right controls.
Supported
Information, instruction, supervision and refresher training help maintain competence.
Build the safety vocabulary
Match each term to its meaning
Correct pairs lock in green.
Source of harm → possible harm
Match each hazard to the risk it creates
The risk statement describes what might happen if the hazard is not controlled.
Name the concept
Quick type-in
Type the common health and safety word for the ability to use appropriate training, skills, experience and knowledge to perform work safely.
Can you use hazard and risk correctly?
Independent check: cracked scaffold board
A cracked scaffold board is found before use. Which statement uses the terms correctly?
Look wider than the obvious danger
Good hazard identification is systematic. You look at the workplace, the task and the people — not just the obvious danger in front of you.
Inspect the site
Walk the area and look at access, ground, equipment, materials, services, interfaces and changing conditions.
Break down the task
Consider each step of the work and ask what could go wrong at that point.
Use information
Talk to workers, check manufacturer guidance, SDS information, previous incidents and relevant drawings or surveys.
Seven hazard areas: build a much wider mental picture
For AC 1.6 you must be able to list a hazard and potential risk for every required area. The strongest preparation is to know several examples in each category so an unfamiliar site scenario still makes sense.
| Required area | Typical hazards | Potential harm / risk |
|---|---|---|
| Resources | cement, solvents, sharp materials, heavy blocks, timber with protruding nails | burns/dermatitis, inhalation, cuts, strains, crush injuries |
| Equipment | damaged power tool, missing guard, defective ladder, poorly maintained mixer | cuts, entanglement, electric shock, fall, trapping |
| Obstructions | trailing leads, waste, materials in walkways, hoses across access routes | slips/trips, falls, collision, blocked emergency access |
| Storage | unstable brick packs, poorly stacked timber, unsecured cylinders, overloaded racks | collapse, struck-by injury, fire, crush injury |
| Services | overhead power lines, buried electricity/gas/water, temporary electrical supplies | electrocution, burns, fire/explosion, flooding or service strike |
| Wastes | sharp offcuts, dusty rubble, leaking containers, asbestos-containing waste | cuts, exposure, fire/environmental harm, hazardous contamination |
| Work activities | excavating, cutting/grinding, lifting operations, work at height, hot work | collapse, dust/noise exposure, struck/crushed, falls, fire |
Seven areas you must be able to scan
For this qualification you need to recognise hazards and potential risks across seven specific areas.
Materials and consumables used for the work.
Tools, plant and work equipment.
Anything blocking or narrowing a safe route or work area.
How materials, tools and substances are stacked or stored.
Electricity, gas, water and other buried or overhead services.
Offcuts, packaging, contaminated waste and sharp or unstable debris.
Hazards created by the work itself, including dust, noise, movement and work at height.
Know the seven hazard areas
Identify the seven required hazard areas
Select the seven categories that belong to the qualification range.
Scan the whole site, not just the task
A real site rarely presents one hazard at a time. Materials, plant, routes, services, waste and work activities overlap.
Put each hazard in the right place
Sort the hazards into the seven required areas
Each example has one clearly intended category.
What could happen?
Match four hazards to their potential risks
Think about the harm that could result if the hazard is not controlled.
Finish the seven-category picture
Match the remaining hazards to their potential risks
Correct pairs stay green.
Cover every required hazard area
Seven-category evidence challenge
Match each required area to a clear hazard-and-risk example. This activity covers one hazard and one potential risk for every required category.
Can you state both parts clearly?
Independent check: buried service
A groundworker is about to dig where utility drawings show an electrical service. Which answer correctly identifies the hazard and potential risk?
Why reporting matters
Reporting accidents and near misses is how an organisation learns what is really happening, rather than what the paperwork says should happen.
Prevent recurrence
Reports give managers evidence to investigate causes and strengthen controls.
Find patterns
Repeated minor events may reveal a route, task or piece of equipment that needs attention.
Support people
Accurate records help injured workers, safety representatives and those reviewing health and safety arrangements.
Why accidents and near misses must be reported
Reporting gives the organisation a chance to protect people now and learn before the same weakness causes greater harm. A near miss is valuable safety information because the outcome could have been different by only a few centimetres or seconds.
Immediate protection
Reporting allows first aid or medical help to be arranged, the area to be made safe and dangerous equipment or conditions to be taken out of use.
Investigation and learning
Facts can be gathered while they are fresh. The organisation can identify immediate and underlying causes and decide whether risk assessments, method statements, training or controls need to change.
Patterns and prevention
Several minor reports may reveal a repeating weakness — for example poor housekeeping in one access route or repeated reversing conflicts — before someone is seriously injured.
Legal and record requirements
Employers need suitable records and must consider whether an incident is reportable under RIDDOR. Internal reporting also supports insurance, occupational-health and management processes.
Internal learning and legal reporting are not the same thing
Not every near miss is legally reportable to HSE. However, reporting near misses internally is valuable good practice, and certain defined dangerous occurrences are legally reportable under RIDDOR even if nobody is injured.
Internal reporting
Site or company arrangements for accidents, hazards and near misses. Used to learn, investigate and improve controls.
RIDDOR reporting
A legal duty on the responsible person for specified injuries, diseases, deaths and dangerous occurrences that meet the regulations.
What value does a report create?
Sort the reasons for reporting
Place each reason where it most directly adds value.
Reporting should lead to action
Identify five good reasons to report
Select five reasons that genuinely support safer work.
Can you see the value before somebody is injured?
Independent check: the dropped brick
A brick falls from a scaffold and lands beside a worker. Nobody is hurt. What is the best response?
What should happen after an accident?
A typical accident-reporting procedure starts with people and immediate safety — not form filling.
A typical accident-reporting procedure from event to learning
Different employers use different forms and job titles, but the underlying sequence is consistent. Put people and immediate safety first, then record accurate facts and improve the controls.
A useful report is factual and actionable
Good records are factual, timely and useful. They should help the organisation understand the event without turning the record into speculation or blame.
Record what happened
Date, location, activity, people involved, injury or damage, witnesses and immediate actions.
Investigate causes
Look for failed controls, poor planning, equipment issues, supervision, information and environmental conditions.
Feed learning back
Update risk assessments, method statements, training or site arrangements where needed.
Put people first, then record and learn
Build a sensible accident-reporting flow
Arrange the steps in the order they would normally happen.
What comes after immediate care?
Scenario: injured hand
A worker cuts a hand badly on sharp sheet material. The wound has been treated and the area made safe. What should happen next?
Can you identify the essential steps?
Independent check: typical reporting procedure
Select four actions that belong in a sensible accident-reporting process.
Who reports what?
Workers, supervisors and employers all have roles in incident reporting — but they are not the same role.
Worker
Reports the accident, injury, hazard or near miss internally as required by the site procedure and provides accurate information.
Supervisor / manager
Makes sure immediate action is taken, the incident is recorded, relevant people are informed and controls are reviewed.
RIDDOR responsible person
Where an incident is legally reportable, the responsible person — for example the employer, self-employed person or person in control of work premises — submits the RIDDOR report.
Know who reports internally and who reports under RIDDOR
A common exam trap is to make an ordinary employee responsible for submitting the statutory report. Workers have a clear duty to report through the site system, but the legal RIDDOR report is made by the responsible person.
Worker / witness
Raise the alarm, get help where needed, report the accident, near miss, defect or dangerous condition to the appropriate person and give accurate information. Do not conceal an event because nobody was hurt.
Supervisor / manager
Make sure immediate action is taken, arrange the internal record and investigation, preserve relevant evidence where appropriate and escalate the event through company procedures.
Employer / responsible person
Under RIDDOR, the responsible person may be the employer, a self-employed person in specified circumstances or the person in control of work premises. They decide whether a reportable category is met and make the statutory submission.
Competent support
Health-and-safety advisers can help investigate and interpret requirements, but using an adviser does not remove the dutyholder’s legal responsibilities.
Acronym builder: RIDDOR
Build RIDDOR
Construct the full name of the reporting regulations. Spare words are included.
Who owns each action?
Sort the reporting responsibilities
Place each action with the person who most directly owns it.
Can you separate internal reporting from statutory reporting?
Independent check: broken arm
An employee breaks an arm in a work-related accident. Who normally has the legal duty to submit any required RIDDOR report?
Why reassess when conditions change?
A planned risk assessment deals with foreseeable work. A dynamic risk assessment is a practical reassessment when the real conditions are different from the plan or change while the work is happening.
Spot change
Weather, access, ground conditions, plant, other trades or the task itself may change.
Reconsider the risk
Ask whether the original controls still protect people and whether new hazards have appeared.
Act before continuing
Pause or stop if necessary, put additional controls in place and communicate what has changed.
Dynamic risk assessment: reassess the real situation
The phrase “dynamic risk assessment” describes the practical process of noticing that real conditions differ from the plan and reassessing before continuing. It supports planned risk management; it does not replace it.
Typical triggers
- weather, light or ground conditions deteriorate
- access or escape routes become blocked
- another trade or members of the public enter the area
- plant, tools or materials are changed
- the structure, excavation or load behaves differently from expected
- a control is missing, damaged or cannot be used
What the worker should do
- pause or stop if continuing could expose someone to danger
- identify what has changed and who may now be affected
- decide whether existing controls are still adequate
- add authorised controls or seek advice where needed
- communicate the change before resuming
What kinds of change matter?
Examples that should trigger a fresh look
Weather changes
Heavy rain, ice, high winds or extreme heat affect stability, access, visibility and worker capability.
Unexpected site conditions
Unknown services, weak ground, damaged structures or a changed access route may create new risks.
Equipment or work changes
Plant breakdown, substitute equipment, another trade entering the area or a changed method can invalidate the original plan.
Spot the changes that matter
Which changes should make you pause?
Select the four changes that clearly justify reassessing the task before continuing.
A simple response to changing conditions
Recognise that reality no longer matches the plan.
Consider the new hazard, who could be harmed and how serious the risk is.
Introduce suitable controls. If the risk remains unacceptable, do not continue.
Tell the right people and update the planned assessment or method where needed.
Respond to change in the right order
Build the dynamic reassessment flow
Arrange the four actions into a sensible response to changed site conditions.
Which changes actually matter?
When should you reassess?
Select five situations that should trigger a fresh look at the risk.
Use the process on a real site change
Scenario: excavation after heavy rain
The sides of an excavation are showing movement after heavy rain. What is the best immediate response?
Do you understand why it exists?
Independent check: purpose
Which statement best describes the purpose of a dynamic risk assessment?
Ten things you should now know
You should now be able to do ten things confidently:
Purpose of risk assessments and method statements
Final 1 — purpose of the documents
Select the three accurate statements.
Legal requirements
Final 2 — legal requirement
An employer has eight employees. Which statement is correct?
Common accident causes
Final 3 — common causes
Match the accident kind to the example.
Consequences of failure
Final 4 — implications
Select four realistic consequences of failing to prevent accidents and ill health.
Use the safety language precisely
Final 5 — key terms
Match all five terms correctly.
Hazards and potential risks
Final 6 — seven hazard areas
Match each area to the clearest hazard-and-risk example.
Why reporting matters
Final 7 — why report?
Select four strong reasons to report accidents and near misses.
Typical accident-reporting procedure
Final 8 — reporting flow
Put a typical accident response into a sensible order.
Reporting responsibility
Final 9 — who makes the RIDDOR report?
Which answer is correct?
Dynamic risk assessment
Final 10 — changing conditions
A planned lift is about to begin when high winds develop and the exclusion zone is no longer effective. What should happen?
Where this learning is grounded
Health and safety guidance changes over time. The legal and technical teaching in this book has been checked against current HSE guidance and the City & Guilds qualification handbook.
Principles of Risk Assessment - completion record
Your learning, practice and mapped checks are summarised below.
City & Guilds Level 1 Award in Health and Safety in a Construction Environment (6072-51) · Learning Outcome 1 · mapped to Qualification Handbook v2.3.
Criterion progress
Activity record
| Activity | Type | Criterion | First attempt | Final | Attempts | Status |
|---|
Evidence statement
This record summarises completion of the independent learning and automatically marked knowledge-check activities within LO1. It is evidence of engagement and demonstrated learning within this resource; it is not a City & Guilds qualification certificate and does not replace the awarding organisation's formal assessment.