This chapter offers a preliminary analysis of the post-punk worlds of Manchester, Liverpool and Sheffield. It develops this analysis by way of an examination of their formal network properties. The chapter focuses on the role of key elements of music worlds: resources, places and conventions. It begins with a discussion of basic network parameters. Network properties and structure are important, because they facilitate the collective action which, in turn, facilitates the emergence of a music world. Support personnel link to various different bands in a network such that they have a higher degree within the network and play a significant role in linking its various clusters together into a single component. They are the most central players in the network. The chapter provides the definitions of the key forms of node centrality, adding a brief definition of their corresponding forms of centralisation.