After 14 weeks of liaising with my dealership I have been informed that despite the BMW website showing 2 bike racks available for the F06 (6 series convertible) they are no longer available.
The click-on accessory system was available for F06 up until production date 06/2013. At this point a change to the vehicle coding module meant that this accessory would no longer fit but it has not been removed from their website.
However apparently a new click-on system is in development and due to launch in Aug/Sept 2014 and will fit vehicles going back to production date 07/2013.
Not happy!