Commercially bought (and self-made) signs should comply with the Regulations. They generally fall into six categories:

# Prohibition signs - black symbol on a white
background inside a red circle with a red diagonal
line across the circle
# Warning signs - black symbol on a yellow
background inside a black triangle
# Mandatory signs - white symbol on a blue circular
background

# Emergency escapes - white symbol on a green
rectangular or square background

# Fire-fighting signs - white symbol on a red
rectangular or square background

#Obstacles or dangerous locations (eg low headheight,
tripping hazard etc) - alternating yellow and
black stripes
What you should do next?
Using the previous information, check your existing
signs to ensure:
- you have the correct signs;
- they carry the correct warning symbol where
appropriate;
- they are suitably located and not obscured;
- they are clean, durable and weatherproof where
necessary;
- illuminated signs have regular lamp checks; and
- they are used when required (eg 'Caution wet floor'
signs).