Could someone with a late C6 with the DVD based Sat Nav (or who has the 2011 DVD) have a look and see what the version number of the navigation data is please. You can get this by going into Setup followed by Settings (top right button), then select Version Information and the MMI Software and Navigation Database version numbers are displayed (may take a few moments to display). Only need the bit after "ECE" as the numbers/letters before that are just the part number of the DVD.
I am curious as I was looking at what claims to be a 2011 disk and it has the same database version number as my 2009 disk and looking locally, new roads are still missing. No point in paying for a new disk if they haven't changed the data