Mr Justice Mostyn said in his judgement last month that DWP’s intention had been “to save money” and that the decision to introduce the new regulations had been “manifestly without reasonable foundation”.
He said the work and pensions secretary had relied on a senior civil servant whose advice that people with psychological distress “generally have a lower level of functional need” had been “no more than a subjective opinion or hypothesis” and “a generalised assertion” without “factual or evidential basis”.
Kotova said this was not the first time the government had failed to ground its policies in solid evidence.
She said: “We are outraged that the policy which has an impact on thousands of disabled people was based on unsupported opinions of the DWP’s experts.
“Sadly, the DWP does not know what our lives are really like and does not want to know, as they have failed to meaningfully engage with disabled people and our organisations for a long time.”