I have worked on bts ug Network for 20 years and I can tell you that the network is in a terrible state. Years of underinvestment have led to the point where channels are overloaded, constipation is frequent, and cable recovery has taken place, many sound channels have collapsed. Where the canals crossed bridges in steel canals and there were cables from Hesse, the whole length is doomed, the only answer is massive investment and this is very unlikely. You have to see it to believe it!!! The benefits of infrastructure sharing agreements are obvious, especially when they are accompanied, as in Spain, by promises of investment. We have a lot of experience in networking for many years, and with that experience, we often find that we don`t need to dig when we study. We had some mistakes in a few streets near me, I was surprised to see no channel, just wire buried a few centimeters under the asphalt, so a complete open cut of hundreds of meters to then lay fiber, believe it when I see it. In 2016, Ofcom began revising this approach with an improved approach to Duct and Pole Access (DPA), which this month was taken over by a now much more independent Openreach. The update gives ISPs more information (better maps, etc.), more efficient processes, new obligations for repairing/evacuating blocked channels (cost), better prices and makes PIA available to ISPs that build networks for households and businesses (mixed use, with restrictions). . . .