You must have plans in place to respond effectively to health and safety incidents and other emergencies that might occur at an event. Events should provide an Emergency Plan with an appropriate level of detail for the scale of your event and risk presented by event activities and the potential extent and severity of the incident.
You must consider the key risks to the event and those people present.
Develop emergency procedures to be followed by staff and volunteers in an emergency, e.g. a fire or structural failure. Have in place contingency plans to deal with incidents and situations as varied as overcrowding of part or all of the site, severe weather or power failure.
You will also need to consider your response to more serious emergencies, including major incidents that will require the help of the emergency services and where the situation is serious, hand over responsibility for the incident / emergency along with control of event stewards.
An Emergency Plan will be required as part of your event application this should give the detail of provision during your event as well as your build and break period.
It might be appropriate, if your event runs into the night, to provide emergency lighting to light holding areas and emergency exit routes. This should be shown on your event site plan.
In case of an emergency, appropriate means of alerting and addressing the public attending an event should be in place. Any emergency Public Address System needs to have a battery powered auxiliary system in case of power failure.