
They do.
UK minister tells telcos to share telegraph poles...
Where I live they already are.
Our local telco has wired me up using the existing BT pole as it was not possible to run a cable underground due to the congested sewers, gas mains and electricity cables that run under the small area where the houses are. In other places they have put the cables underground, causing a considerable amount of disruption on the roads. For example, why would anyone in their right mind start digging up the road in one of our most popular holiday towns in the middle of the season?
Having said that the local telco is about five years ahead of Openreach round here and will be finished long before BT gets round to doing anything other than making promises.