There are four types of safety signs that are commonly used in the UK today. These are:

• Prohibition signs: These signs indicate actions or behaviors that are strictly prohibited. They are used to prevent people from doing things that could cause harm to themselves or others. They have a red circle with a diagonal slash through it, accompanied by a pictogram or a text indicating the prohibited action.
• Warning signs: These signs warn people of potential hazards or risks. They are used to help people identify and avoid potential dangers. They have a yellow triangle with a symbol such as an exclamation mark, accompanied by a pictogram or text indicating the potential hazard.
• Mandatory signs: These signs mandate specific actions or behaviors. They are used to make sure that people follow important safety procedures. They have a blue circle with a white pictogram or text indicating the required action.
• Safe condition signs: These signs indicate that an area or equipment is safe to use or enter. They are used to provide reassurance to people who may be unsure about whether or not it is safe to proceed. They have a green square or rectangle with a white pictogram or text indicating the safe condition.

In addition to these four main types of safety signs, there are also a number of other specialized safety signs that are used in specific industries or settings. For example, there are fire safety signs, emergency escape signs, and radiation warning signs.

Regardless of the type of safety sign, it is important that it is properly designed, maintained, and placed in a visible location. Safety signs must also comply with relevant safety regulations in order to be effective.

Here are some examples of each type of safety sign:

Prohibition signs:

• No smoking signs
• No entry signs
• Do not touch signs
• Do not operate signs

Warning signs:

• Electrical hazard signs
• Slippery surface signs
• Falling objects signs
• Hazardous substances signs

Mandatory signs:

• Personal protective equipment (PPE) signs
• Eye protection signs
• Hand hygiene signs
• Fire safety signs

Safe condition signs:

• Safe area signs
• Non-hazardous substances signs
• Authorized personnel only signs

Safety signs are an important part of any safety program. They can help to prevent accidents, injuries, and illness by providing clear and concise information about potential hazards and safe practices.