Climbing Hydrangea, Hydrangea anomala petiolaris.

I’ve got one, and I love it. More of a vine than a shrub, but I imagine it could be pruned and shaped into a fairly shrubby appearance if desired.

Thank you very much dillybeansown. That is great info for me.

It’s self adhesive and can climb masonry like ivy.

And it will get very large and heavy.

Grows as a shrub when no support is present, develops a habit that has been described as "picturesque".