The most recent estimates of the average number of families with tax credits awards, including those benefiting from the child care element of the working tax credit, by constituency, based on final family circumstances and incomes, are presented in table 3 of the HMRC publication “Child and Working Tax Credits. Finalised Awards. Geographical Analysis 2005-06”. This publication is available on the HMRC website at:
http://www.hmrc.gov.uk/stats/personal-tax-credits/cwtc-geog-stats.htm