In even the wealthiest countries there are pervasive and stark differences in health by neighbourhood and region, race, socio-economic conditions and opportunities, and other liens of social and economic inequality. Many governments are trying to develop comprehensive policy and programme action to address these health disparities. One at the municipal level is the Greater London Authority in England: it issued a report identifying key issues and priorities for action in August 2007. As foundations for its action plan, the GLA had published a comprehensive review of the evidence base and an overview paper mapping the policy context for strategies and activities to address health inequality.