The DWP have recently published new data at a neighbourhood level based on 100% caseload counts.
" The data shows DWP benefit claimants within small geographical areas on a quarterly basis going back to August 1999. These geographical areas are frozen 2003 Census Area Statistics (CAS) wards and Lower Super Output Areas (LSOA) in England & Wales and Data Zones in Scotland. All data is derived from the Work and Pensions Longitudinal Study (WPLS) used to publish national, regional and Local Authority caseload information."

The link is http://193.115.152.21/NESS/page1.htm