Current collaborative arrangements
Policy and infrastructure collaboration across the Wider South East, including WSE Summits, Political Steering Group meetings, and the Strategic Spatial Planning Officer Working Group
https://www.london.gov.uk/about-us/organisations-we-work/policy-and-infrastructure-collaboration-across-wider-south-east
Mayor of London’s engagement with authorities in the Wider South East in the context of preparing the new London Plan
https://www.london.gov.uk/what-we-do/planning/who-we-work/mayors-engagement-wider-south-east
International examples of coordinated planning at metro scale
Institut d’aménagement at d’urbanisme de la région Île-de-France
https://en.iau-idf.fr/
New York City regional planning office
https://www1.nyc.gov/site/planning/plans/region/region.page
New York Regional Plan Association
http://www.rpa.org/
Greater Sydney Commission
https://www.greater.sydney/