The information requested is not available.
However, estimates of the number of in-work families benefiting from Tax Credits, by country and government office region, as at December 2008, are available in table 1 of the HMRC snapshot publication, “Child and Working Tax Credits Statistics. Geographical Analyses. December 2008”, on the HMRC website at:
The latest published estimates of take-up rates of in-work families by country and government office regions are reported in table 9 of the HMRC publication, “Child Tax Credit and Working Tax Credit Take-up Rates 2005-06” which is available on the HMRC website at: