This is not Jackmanii, as you can see by all the other images in that entry, rather, it strongly resembles Clematis (Clematis viticella 'Venosa Violacea') and I would like to move all your images into that entry.

@Calif_Sue
I completely agree. and yes, please move them. ThankY

It's actually been pointed out that it only has 4 petals so can't be Venosa Violacea either so I'll move it to the generic clematis entry.