I've had contracts with villages comprising of total new developments and the government do absolutely nothing to ensure decent infrastructure. There is a village nearby which has over 1000 new homes in it, built by 3 or 4 different developers. Apart from the main roads running through, not a single side road has been adopted by the council as they do not meet standards. The residents are now left with unmaintained roads, blown out street lamps and blocked drains.. but guess what, its all completely legal and the dev has no obligation to build these roads to a standard. They of course however do have to commit to some sort of maintenance contract with the residents, but at that point it becomes a civil matter and they face little consequence for not adhering to such contracts.
All the houses can also only receive <4mb adsl even though the main fibre line serving Lincoln runs half a mile away. The fibre network (VM?) has said they will not bring fibre to the village as it will cost too much at this stage. They would have however if it was discussed with them at the beginning of the development.
At the end of the day, the devs will do as little as they can get away with to maximise profit, obviously. It is up the the local authorities to enforce such things. Most local authorities are stuck in the previous century, not planning ahead for infrastructure and not updating planning laws to accommodate for modern designs and ways of building. To add, the devs have been given permission to extend the village another 500+ homes, despite all the issues they have caused. Some serious backhanders being dished out.
Anyway, breifly back to the topic,
I managed to chat with an Openreach engineer today. He had his head buried in a cab so I thought I'd jump out the car for a word. I didn't disclose my actually location but I gave him the full low down on the pole; the fact it only serves my house etc. He said he knows of many situations where third party stuff is attached to them, from the exact equipment we are talking about here, to sky satellites. He said there is a channel to go through to request permission and it can be done. The only thing he said was that they have never had cables running along their own, they have always run up the pole, so couldn't comment on whether they would allow suspended cables fittings.
So it looks like I'll be going for permission after all. If they do say know, I'll stick a flag pole up, I'll just have to anchor it with some cables as I'm sure these devices do not tolerate much movement, if any.