A risk assessment is a key tool for preparing your Event Management Plan.
As part of managing the health and safety of your event you must control the risks. To do this you need to think about what might cause harm to people and decide whether you are taking reasonable steps to prevent that harm. This is known as risk assessment and it is something you are required by law to carry out. If you have fewer than five employees you don't have to write anything down.
Guidance on how to assess the risks, example risk assessments and risk assessment templates can be found on the HSE website.
The HSE gives advice on the controls you will need to take for event related hazards.