How do i change network on facebook?

say i wanted to be in the london network, were do i go how do i join, thanksHow do i change network on facebook?
Go to the top of the page, by the Logout button, where it says settings. Select account settings, and it will take you to a page with 5 tabs. Click on the second tab (';Networks';), and on the right side it has a thing for joining a new network.How do i change network on facebook?
edit your network in account settings