Disabled people set a precedent. And the DWP didn’t like it.
Back in November 2016, Jacqueline and Jayson Carmichael successfully beat the government in court over the so-called Bedroom Tax. They argued the tax was discriminatory under the European Convention on Human Rights (ECHR), as Jacqueline cannot share a bedroom with her husband because of her impairments. And the court agreed, setting a precedent for other claimants.
The DWP is not one to concern itself with human rights, judges and the law, though. So, like a blocked septic tank it just kept re-emerging from its rancid cesspit in Westminster trying to fight the original decision in other courts. And it repeatedlylost.
Source: The DWP has now sunk so low, it’s in court trying to block human rights laws : Govt Newspeak