Workplace safety signs help communicate important health and safety information quickly and clearly. They alert people to hazards, identify emergency equipment, provide mandatory instructions and help employees and visitors respond appropriately during normal operations and emergencies.
Safety signs should support, not replace, safe systems of work, training and risk control measures.
This guide explains the main categories of workplace safety signs used in the UK, what they mean and why they are important.
This information is general guidance and should not be considered legal advice.
Safety signs provide clear visual information where risks cannot be completely eliminated by other control measures.
They help people:
| Sign Type | Colour | Purpose |
|---|---|---|
| Prohibition | Red | Shows actions that are not allowed. |
| Warning | Yellow | Warns of hazards or dangers. |
| Mandatory | Blue | Indicates actions that must be followed. |
| Emergency Escape & First Aid | Green | Identifies emergency exits and first aid facilities. |
| Fire Safety | Red | Identifies fire equipment and alarms. |
Prohibition signs tell people what they must not do.
Examples include:
Warning signs alert people to hazards that may cause injury if appropriate precautions are not taken.
Common examples include:
Mandatory signs show actions that must be followed to reduce risk.
Examples include:
Green safety signs identify emergency facilities and safe routes.
Examples include:
See First Aid Signage Requirements UK.
Fire safety signs help people quickly locate equipment used during fire emergencies.
Examples include:
Safety signs are generally used where significant risks remain after other control measures have been considered.
Signs should support workplace risk assessments and safe systems of work rather than replacing them.
See Workplace First Aid Risk Assessment.
Signs should be clearly visible, easy to understand and located where they are most likely to be seen before a hazard is encountered.
Poor positioning may reduce their effectiveness.
Employers should regularly check that safety signs remain:
Workplace safety signs play an important role in communicating hazards, emergency information and safe working practices. Used correctly, they support risk assessments, improve awareness and contribute to a safer working environment.
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