The event, free of charge and open to all interested stakeholders, took place virtually on the 9th and 10th of December, 2021, and the main points were: Use Cases: The speakers brought real-life examples of how they are transforming the traditionally slow deliberative policy making process in the fields of health, climate change and mobility, to one that is more agile and responsive. We heard directly from cities themselves on how they are developing better evidence-based policies which adapt as new data comes to light, and which are trusted and contributed to by relevant stakeholders who feel engaged in the process. Tools: We saw how city managers and policy makers are co-creating data-driven decision-making ecosystems with cutting edge tools which enable them to visualise, analyse and even predict the complex impact of decisions across multiple domains, time and space. The event was hands-on with AI, big data and digital twin demos and was inspired by what stakeholders could potentially achieve for their administration. Strategies: Learned how to manage legal, ethical and standards challenges and constraints in our increasingly digital world. From best practices to principles and legislation our speakers helped the audience understand and navigate the complex environment in pragmatic ways that helped them start their own journey.