Our back-office systems consume vehicle response data from the VKI application in export (.EXP) files. Has this file format also changed?

Yes.  Four new fields have been added to the end of each row: Date of Scrapping, Date of Export, Title and EnquirerId.  The file format is otherwise unchanged.

You are advised to determine whether or not your consumer systems need to be reconfigured in order to accept the new file format. A full description of the new export file format appears in Appendix B of the User Guide, which can be dowloaded here.