From the online version requirements: a computer with: software compatible with Excel 2003 and Word 2003, printer, internet access and access to email (allowing the sending and receipt of spreadsheet and other attachments). Candidates are asked not to use Excel or Word 2007 and must not embed documents in spreadsheets. I have always assumed that it would be office 2003 coz of that. Have been using 2007 for a while now and now there is 2010. A letter to them would be a good idea.