Hi Lorna, It's taken me nearly 3 years to find out what my Clems were ::) , I have 5 of this one. Problem was conflicting information on different websites ::) I was just about sure after finding it on the Clematis Hull website then when I saw one in the flesh at the Gardening Scotland show, I knew that I have Nelly Mosers.
Dibber, sorry to hear about your bad luck with Clems, what did you have and what else have you tried?