I have a south facing concrete wall (it forms the boundary to the back of the garden, but the wall doesn’t belong to us). There is (from left to right, as you look at the wall from our garden) - garden room covering a third of it, then you see the wall which has a kids slide/swings/playhouse combo, and then a shed, which covers the rest of it.
Growing up from the other side of the wall are huge elders, wisteria etc which overhand the wall. So although it is south facing, there is a lot of shelter and shade.
I am looking for a long-flowering climber, preferably evergreen but I don’t really mind, which I can train so the it grows sideways, as the overhang means that I don’t need it to grow upwards. As it is down the far end of the garden, I’d like to see the flowers from the house quite easily (without my glasses on!) so a prolific flowerer, or large flowers, would be ideal please!