Thanks for all your contributions. I probably should have specified a bit more detail in my original post.
It is an Openreach PIA install, so it means they are using the existing infrastructure. I presume this means they can use the existing anchoring points installed by Openreach on the property exterior, too?
They have cable-tied the new fibre optic cable to the existing Openreach copper. Is this not OK, even with a PIA install?
It seems like the more responses I get, the more obvious is that they should have done a drip loop. It is a shame I noticed it after they left.
All these responses are appreciated as I am trying to establish if I have genuine reasons to ask them to make changes.