This is certainly odd to us here in the States as almost all poles have combined systems.
It's common enough to find telephone running below 240/415V in rural areas here, just very rare to have anything else on the same poles with HV. I think "townies" probably find even shared LV power/telephone odd sometimes as they're not used to seeing it as much.
One of the things which is very noticeable about Britain compared to the U.S. is that as soon as you reach any sort of town the power distribution is far more likely to be all underground here. This is even the case in relatively small towns.
Stalham, about 5 miles from here, is a good example. This is a small town of about 3500 people. The 33kV feeder to this whole area comes in overhead across the fields to the main area sub-station at one edge of town, and there are 11kV overheads from there which distribute out around the surrounding countryside. But within Stalham itself, both the 11kV feeds to the final xfmrs and the 240/415V distribution are all underground.
