1. Before the event

Check the event details and any alcohol restrictions. If you cannot find these or are concerned about them you can contact the organisers and/or the local council licensing team to discuss your concerns and how these might be addressed.

Make sure that the event has the appropriate licence and alcohol management plan in place.

If the event has been run before and there were alcohol-related problems associated with it, this must be a consideration for the licensing authorities.  There might be a case for the enforcement agencies to oppose the licence and/or the District Licensing Committee to refuse to grant a licence or, at the very least, require additional requirements (conditions) on the licence.

Depending of the timing you may wish/be able to object to the licence application, please check out how to object to a liquor licence application.