The Homes and Communities Agency and formerly the Housing Corporation publish the regional allocation statements on their websites. These provide information on allocations made by region and by quarter for the 2008-09 Affordable Housing Programme.
http://www.homesandcommunities.co.uk/inyourarea
http://www.housingcorp.gov.uk/server/show/nav.394
Regional allocation statements for Affordable Housing Programme for previous financial years are also available on the Housing Corporation website.