We used to have constant problems with the cable flapping loose down the front wall of our house. It looks awful and the cable will eventually suffer damaged, likewise TV antenna cables flapping about in the wind. The problem was the mortar between the bricks was so soft, as to give no fixing to nail clips.
I moved everything inside, so the cables went straight from the pole, into the loft at the eaves, then down the centre of the house. Likewise with the antenna cables, there have been no problems since and the house looks much tidier. You cannot expect Openreach to do this, but if you run the cable ready for them, they will likely be more than happy to connect it.
They will probably be willing to refix the cable where it is at no charge, but they could charge for additional or moving an existing socket.
