Defence does not routinely maintain information of this type. Defence's past and present information systems are not configured to readily provide data by electoral division. Consequently, extraction of this data relies on vendor or payee postcode information, and the validity of such data cannot, therefore, be guaranteed. Given the problematic nature of the data available, the following response should be interpreted as representing a best estimate of the information requested:

In addition to these facilities and employees in Barton, since 1996 Defence has spent a significant amount on goods and services provided by businesses based in Barton. The following table shows indicative expenditure by year and category:

Note: Information obtained by searching for Barton postcodes among vendors' mailing addresses on invoices across the requested period, using Defence's Financial Management Information System. Where postcodes span two or more electorates, the relevant totals have been apportioned to Barton on the basis of advice from the Parliamentary Library Service.