Posted: 16/04/2015 at 16:43
Thanks for that ref. Had a look and I think it might be Koreana blue eclipse as although it looks pinkish in the photo it has blue flowers to start with. It's in full flower now and though it's facing south its got a high wall to the east and is sheltered by the porch to the west.
It's my daughter's house/clematis. She has just posted the photo on facebook , someone asked which it was, she can't remember but has said 'Mother will know!!!!!' I bought her the milk churn it's in but I didn't buy the clematis.