D6.1 Argument Analysis, Tracking and Visualisation Tool Requirements Analysis, Tool Specification and Construction Plan Report is now available.  The report describes the requirements analysis and specification, as well as the construction plan, for the Argument Analysis, Tracking and Visualisation tool (AVT), which is one of the components of the IMPACT argumentation toolbox. The AVT is intended to support the work of relevant actors by provid- ing them with the ability to navigate through arguments and persistent link- ages to relevant consultation and policy documents. The tool will be based on the state-of-the-art in the field of computational models of argument and ar- gument visualisation methods. WP6 will conduct research on how to improve the readability of very large, Web-based argument maps. We will also inves- tigate the mediating role that such large, Web-based argument maps can play in e-participation scenarios. In particular, we intend to investigate the method and practice of how various stakeholders use the AVT tool in the policy- making process.