This article is based on a previously published information article which was released on 15 May 2009. It outlines methodological and publication changes in the calculation of the value and volume retail sales estimates from the ONS Retail Sales Inquiry that were introduced in the April 2009 retail sales estimates, which were published on 21 May 2009. A comparison between the previously published estimates and the estimates including all the methodological changes is provided for the 'All retailing' estimate.
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