This guide aims to support London borough councils to hold their own half day Great Weight Debate Hackathon. The guide includes a template agenda and suggested challenges for attendees to tackle. It also includes template power point slides for your hackathon and a list of resources that will be needed, including facilitators on the day. There is also template copy for your websites and a template media release. The focus is on supporting councils to hold a hackathon on a budget using existing council resources and facilities.