Iain Duncan Smith and his fellow ministers have been accused of obstructing MPs’ attempts to scrutinise his flagship Universal Credit welfare scheme by failing to give them “accurate, timely and detailed information”.

The Commons Work and Pensions Committee lashed out at ministers as it warned that the Universal Credit, which aims to roll together six benefits, was being brought out at “snail’s pace”.

Duncan Smith’s Universal Credit scheme has been bogged down in IT problems that has forced its introduction across the country to be delayed and resulted in tens of millions of pounds being wasted.

“It is concerning that it took so long for the government to acknowledge openly that there were problems with Universal Credit IT,” the report said. “The government has hampered the committee’s scrutiny of Universal Credit implementation by not providing accurate, timely and detailed information. It is not acceptable for the government only to provide…