Benefits change: What are the Universal Credit fears?
Seventy organisations, most of which will be involved in implementing the biggest overhaul of the benefits system since the creation of the welfare state, have told MPs of their concerns about the government's plans.
BBC Radio 4's The World This Weekend has been shown the written evidence submitted to the House of Commons Work and Pensions Committee, which is examining the progress being made towards the implementation of the Universal Credit in the autumn of 2013.