To ask the Chancellor of the Exchequer what estimate his Department has made of (a) the number and (b) the amount of child benefit overpayments caused by the failure of a claimant to notify the Child Benefit Office of a change of circumstances in (i) 2005-06, (ii) 2006-07, (iii) 2007-08 and (iv) 2008-09. (308185)

The information requested is not available, as HM Revenue and Customs’ systems do not capture the reasons for child benefit overpayments.