Anna Feuchtwang Chief Executive of the National Children's Bureau said:
'The Supreme Court has recognised that for some families, the benefit cap undermines the rights of children, and stops the UK from meeting its commitment under the United Nations Convention on the Rights of the Child to place the concerns of children first.
'By limiting benefits to £500 regardless of the number of children in a family or how much their rent is the Government has made it virtually impossible for a significant number of the most vulnerable families to feed and clothe their children, or heat their homes.
'In 2016 the UN will assess the UK government on its children's rights record. This ruling shows us that the government is not paying sufficient regard to international law or prioritising the best interests of children in the UK.'