Safety signs: the basics every UK employer should know

If you are responsible for a UK workplace and you've never specified safety signage before, the field can look complicated. There are several regulations, a handful of British Standards, and a confusing mix of "guidance" versus "must-do". This article is the practical starter guide.

The five sign categories

UK workplace safety signs are defined by BS EN ISO 7010, the unified British / European / international standard. Five categories, identified by colour and shape:

1. Prohibition (red circle with diagonal line) — must not. No smoking, no entry, no naked flame.
2. Mandatory (blue circle) — must do. Wear hard hat, wear hi-vis, fire door keep shut.
3. Warning (yellow triangle) — be aware of hazard. Slippery surface, electrical hazard, hot surface.
4. Safe condition (green rectangle) — safe option here. Fire exit, first aid, assembly point.
5. Fire-fighting equipment (red square or rectangle) — equipment is here. Fire extinguisher, hose reel, alarm call point.

Knowing this taxonomy alone gets you 80% of the way to specifying signage correctly. Full colour guide here.

When are signs legally required?

The Health and Safety (Safety Signs and Signals) Regulations 1996 require employers to provide compliant safety signage where a risk to health or safety cannot be eliminated or sufficiently reduced by other means. In plain English: if you've identified a risk in your risk assessment that you can't fully control, you need a sign.

Sector-specific regulations layer on top:

• Fire safety signage — Fire Safety Order 2005
• No smoking signs — Health Act 2006
• Asbestos signage — Control of Asbestos Regulations 2012
• Construction site signage — CDM 2015
• Hazardous substance signage — COSHH 2002
• Electrical equipment signage — EAWR 1989

Where to start

Three steps:

1. Risk assessment. Required under the Management of Health and Safety at Work Regulations 1999. Identifies hazards in your workplace and the controls in place. Where residual risk remains after other controls, you need signage.

2. Fire risk assessment. Required separately under the Fire Safety Order 2005. Identifies fire risks and the signage required for escape routes, fire equipment, and assembly points.

3. Specify and install. Take the residual risks from your assessments and specify BS EN ISO 7010 compliant signage at each. For most workplaces, that's prohibition signs (no smoking is statutory at every entrance), mandatory PPE signs at relevant zones, warning signs at hazards, and fire safety signage along escape routes.

Things people get wrong

• Over-signing. Too many signs dilute attention. Every sign should communicate a residual risk. If a hazard can be eliminated (e.g. by moving equipment or installing a guard), do that instead of just adding a sign.
• Wrong colour or shape. Using a "warning" yellow triangle for what should be a "mandatory" blue circle is a common error in DIY or non-compliant signage. The colour and shape carry the meaning — get them right.
• Inappropriate material. Vinyl on outdoor exposed surfaces fails in 18-24 months. Choose materials suited to the environment.
• Outdated pictograms. BS EN ISO 7010 superseded the older BS 5499-1 in 2013. New installations should use BS EN ISO 7010 pictograms.
• Forgetting the no-smoking sign. The Health Act 2006 is statutory at every workplace entrance. £200 fixed penalty if you don't display it.

Where to get help

For most UK workplaces, Direct Signs can advise on what you need based on your sector and site. For complex projects, we offer a free site survey. For self-service, our knowledge hub has detailed guides on colours, shapes, regulations, and materials.