You are legally responsible for making sure you have a suitable risk assessment. This requirement is set out in the Management of Health and Safety at Work Regulations 1999, under Regulation 3 and Regulation 7. You need to include your risk assessment in your Event Management Plan. A risk assessment identifies risks posed either by the site or the activity, to members of the public, people taking part, and employees, including voluntary workers. It should also show how these risks can be eliminated or minimised. There has to be a site visit, so that any specific hazards can be identified, for example, a dangerous item or substance, condition, situation or activity. You also need to do a Fire Risk assessment, as well as any other specific risk assessments required under other regulations, like Noise and Manual handling.Things to look at in your Risk AssessmentThe event LocationTimeDurationThe venueCapacity and crowd movementSite location and designEntrances and exits, including emergency access and evacuation routesSupport facilities, for example, power supplies, toilets, parking and transportPeople attendingProfileConfiguration, for example, any segregationSite ConstructionStructural calculationsUse of plant and machineryUse and management of contractorsFire riskUse of materialsPyrotechnics and special effectsLitter and refuseTemporary buildings, concession stands, tents, marqueesMarquees and Temporary StructuresEffects of weatherStructural stabilityFireElectrical equipmentCertificates requiredOther things to considerNoise Control (both people on site and resultant noise pollution)CommunicationsFirst Aid and WelfareTopography of siteCrowd dynamicsVehicle movements before, during and after the eventTrip hazardsDamage to hearingElectrical riskFireEvacuation of siteAlcohol salesSpecial effectsLitter and trade refuseThis is not a full list. You should use it to prompt you to consider any aspects which may impact on the event.You should get help from a competent person who has the right skills, knowledge and training to make sure your risk assessments are suitable and sufficient.There is more information on completing Risk Assessments on the Health and Safety Executive (HSE) website.