The Electricity Transmission
Pylons and lines are either operated
on a national basis by National Grid Transco for the
higher voltage equipment, or on a regional basis by
the various regional electricity companies, who operate
the other pylons and lines.
National Grid Transco alone, operates
7,000 kilometres of high voltage pylon line.
In order to operate effectively,
their lines need to run across private property. The
right to do this is usually through negotiation with
a property owner through either a periodic wayleave
or a permanent easement.