The 2011 Census geography prospectus has now been released, setting out what will be published and when. The prospectus gives details of the output geographies that will be supported and outlines the shape-files and look up tables.
The reference data includes:
Most output areas to higher area look up tables will be published in October 2012, including all standard geographies, such as: wards, parish, parliamentary constituency, old LSOA to new LSOA etc….
Other Non-standard geographies, including settlements, rural and urban will be released in January 2013.