While we are awaiting any fuller answer, the instant response is that you should write to the telephone company concerned and ask them what payment they are making to you as a "wayleave" (and where is it ?). The standard practice e.g on the farm I'm posting from, is that utility companies, such as electricity companies, pay a standard amount to landowners for the right to erect and keep their pylons, poles etc on the landowner's land. This is called, in law, "a wayleave". Our local electricity company maintains a department which deals with nothing else but these payments. As to their cutting down your creeper, my guess is that they can, but only to the extent that it adversely affects their provision of serviices and not otherwise. There's almost certain to be some Act of Parliament that governs such matters and gives the answer to that..