Posted: 02/06/2014 at 18:53
For some reason I can't enlarge and zoom in on this one, but from here, and wearing my old glasses, it looks remarkably like Russian Vine - Fallopia baldschuanica aka Mile a Minute Vine. Google Mile a Minute Vine Images - you'll see that it's a pretty rampant climber. I've known it pull guttering off a house. When we moved here it was in the top of a mature ash tree - and I mean the top!!!
It is very pretty and can look lovely if you have several acres of space but in my humble opinion it should never be planted in an average sized garden.