Work Capability Assessment 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 for claimants, for DWP or for Atos Healthcare". In November 2016, the United Nations Committee on the Rights of Persons with Disabilities published its report on the situation facing disabled people in the United Kingdom. Of the WCA, it said: In 2015, Iain Duncan Smith complained that the system gave doctors a "binary choice", not an opportunity to deliver a more nuanced opinion on claimants' fitness for work.
Criticism of the Work Capability Assessment Professor Paul Gregg, an economist and one of the original architects of ESA, warned that the WCA was "badly malfunctioning" and urged further pilot studies before the new version was used to retest existing sickness benefit recipients. Three months later, six experts in mental health — including the chief executive of MIND, who was already a senior advisor to the DWP on the WCA — wrote to "The Guardian" to say that the test was "deeply flawed". In 2013, the DWP published an 'evidence-based review' of the WCA. The department said "a steering group of experts chaired by Professor Harrington