straight forward health and safty advice 
Safety signs give important messages and help to protect you When you see a safety sign, always follow the information that it gives you
General safety
Purpose
   Description             Sample
Safety Signs are one of the main means of communicating health and safety information They must be provided if there is a significant risk that can't be avoided or controlled in any other way, such as through safe systems of work or engineering controls. This applies to all places and activities where people are employed, or where other people have access. However, there is no need to provide safety signs if they don't help reduce the risk or if the risk isn't significant.