Clematis

I got this rather lovely clematis for free. But when I got it I thought its chances of survival were remote. A couple of very unhappy looking twigs and that was it. However I repotted it and put it in my 'rehab" section and suddenly this week (apparently Storm Francis suited it just fine) it has bloomed, rather spectacularly. There was no label so I have no idea what variety - possibly 'Piilu'. If thats correct then i can grow to 3m x 2m. So I will have to find a more permanent home for it!