A review has been conducted of the documentation developed by Andra, collectively known as the Dossier 2005 Argile, by an international review team (IRT) of independent specialists covering all relevant aspects of research, safety assessment, and the geological sciences. As described below, the Dossier represents a key milestone in the programme of work, for which Andra is responsible, to assess the feasibility of the deep geological disposal of high-level and long-lived radioactive waste in France. This report presents the consensus view of the IRT. It is based on the documentation of the Dossier 2005 Argile, but it also draws importantly on information exchanged in writing with Andra in answers to questions raised by the review team, and on direct interactions with staff from Andra during two working seminars in France. Also, in order to fulfil its mandate, the IRT reviewed materials external to the Dossier, namely the document concerning the R&D Programme for a potential new phase of work in the period 2006-2010, in a draft, provisional version.