Development research can contribute to improvements in policy and practice, research capacity and evidence-based policymaking processes. Achieving these kinds of impacts is most often a complex, multifaceted, political and contested process that, ultimately, depends on changing the attitudes and behaviours of key actors. Strengthening the linkages between research and policy depends on the development of strong relationships between networks of stakeholders that will be able to directly effect change or influence those who are in a position to do so. This Learning Guide seeks to draw out some of the key lessons on successful approaches to developing and maintaining effective relationships and strong networks for impact.ESRC-DFID