This Intelligence Unit update (Update 04-2013) uses Department for Education (DfE) data sources to examine the following: Cross border mobility of primary school age children by residence; Cross border mobility of primary school age children by school location; Comparison of DfE estimates with ONS 2011 Census-based data; and Estimates of the number of pupils per borough attending independent school. The equivalent report for secondary school age children was published in November 2012 as Update 25-2012. Both the report and the accompanying data can be downloaded from the Datastore.