This report reviews the "Economics and Social Impact Study of the Proposed Gambling Bill" conducted by the Henley Centre and published in February 2004. The Henley Centre report is an ambitious attempt to quantify the impact of the proposed Gambling Bill. The purpose of this review is to evaluate the findings of the Henley Centre report. Specifically, a full discussion of modelling and methodology is given. Where appropriate the wider existing literature is drawn upon in order to place the Henley Centre findings in context and a section discussing the limitations of the analysis is included. Finally, a discussion of the Henley Centre report contents within the context of the policy regime that will result from the Gambling Bill is provided.