<p>To ask the Secretary of State for Work and Pensions, with reference to the March 2017 report of the NAO entitled Child maintenance: closing cases and managing arrears on the 1993 and 2003 schemes, HC 1054, for what reason fewer than expected parents who were asked by her Department to join the new scheme have been joining that scheme when their 1993 and 2003 scheme cases are closed.</p>