On the 23rd January 2017, UK-GBC, in association with Core Cities UK, brought together senior decision-makers from city authorities and the built environment sector for the Sustainable Cities Leadership Summit in Leeds. The purpose of the event was to accelerate action on sustainable cities, by asking the question: "How can policy-makers and the private sector work in partnership to deliver environmentally sustainable places to live and work, which support both quality of life and economic growth?"