[holding answer 3 March 2010]: The information requested is not available, as tax credit claimants' nationality is not recorded by HM Revenue and Customs.
Tax credits are intended to provide support to families with children and to those in low-paid work in the UK. Therefore eligibility for tax credits depends on the claimants being present and ordinarily resident in the UK. Child tax credit claimants must also have a right to reside in the UK.