They are more than welcome to come to the static elements (ie meet us at the hotel on Saturday afternoon/evening or at the stops on the way round on the Sunday) but they arent allowed to come on the drive. We have enough fun trying to shepherd 50+ Zeds around than trying to add even more cars. Plus it messes up photos
+1 And another reason why we dont allow other cars on the main 350z-uk drives is because a few years ago we allowed non-zeds and some very dangerous driving was observed. Just best to keep these things open to forum member's with zed's.
But like Chris said, members with non-zeds are more than welcome to the static/social side of the event on the Saturday