The Department publishes quarterly statistics on Employment and Support Allowance (ESA): Outcomes of Work Capability Assessments (WCA) which include figures on mandatory reconsiderations and appeals of WCA decisions. These statistics are not currently available to local authority or regional level but DWP statisticians are investigating how to extend the geography information provided. The statistics can be found at the following link:
Table 3 of these statistics covers National figures for appeal outcomes for Fit for Work decisions in initial assessment by month of claim start.
Official statistics on all appeals made with respect to ESA claims are published by the Ministry of Justice and can be found at the following link: