I am going to disappoint you guys but unfortunately that wasn't me at Tesco but Chubbster you said that you saw one parked near Aldi, that could be mine .Never seen black one in Hoddesdon and sometimes mine just looks like its black, especially when u r not close to it.
Next time when you see that other zed you need to put a 350z leaflet under his windscreen wiper lol. You can get them from here ->
http://www.350z-uk.com/topic/191-spotted-cards-here/
I do carry some with me just in case if I see one haha .
Jared there is 4 of us in Hoddesdon, there is a guy Waltzinblack with an Azure one. We defo need to organize a little meeting one day guys.