Criticism of the Work Capability Assessment group of experts — a professor of psychiatry, a consultant psychiatrist in learning disability, a professor of rheumatology, and an expert in human resources — reviewed the WCA in 2013 and concluded that "the WCA produced consistent results on the whole, and is an accurate indicator of work capability compared with expert opinion". But in the year that the study was published, the firms running back-to-work training for people on ESA said they had "ongoing concerns about the accuracy of the WCA". And in 2014, Atos announced that it had come to the conclusion that "the WCA is not working
Criticism of the Work Capability Assessment associated statistically with the unexpected deaths of hundreds of people. There is evidence of harm in individual cases from coroners' reports, and from the DWP's own internal investigations into dozens of claimants' deaths. However, data suggesting that "thousands" of people have died has not withstood expert analysis. Officially, the DWP does not accept that the WCA or the way it has been carried out has caused any deaths. A committee from the United Nations wrote, with regard to 33 deaths investigated in secret by the DWP, that it was "not aware of any attempts at objective, thorough, open and impartial