The Department for Work and Pensions (DWP) rejects the "bedroom tax" tag and says the reality is that "a spare room subsidy" has been removed from social sector tenants.
A DWP spokesman said the new regulations are lawful and adequate steps have been taken to safeguard people with disabilities.
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Natalie Sharp and Christine Bicknell appeared in court over an alleged incident at a Lidl superstore in Wallington, south London.