More than 80 mayors and city network leaders from six continents gathered in Bristol to convene on the topics of migration, urban security and health, reflecting the pressing issues of the world. The outcome of the debates between mayors led to the Bristol Declaration of the 2018 Annual Summit of the Global Parliament of Mayors (GPM).

Mayors highlighted the role of leadership and community involvement when planning and implementing global policies on a local level to overcome challenges in society. They shared examples of where strong local leadership can drive solutions in their cities in ways that are faster or more targeted or more progressive than those put forward at a national level.