The question of whether owners of land can claim compensation
where high voltage power lines cross their land seems to be
something that is being asked more and more, especially in the
current climate where money is tight and alternative sources may be
available.
Electricity network operators have compensated owners in the
past where permanent high voltage power lines / poles / pylons run
over, through or under their land. The relevant pole / pylon
has to be on the property itself, or the wires must run directly
over, through or under it so as to (in the case of overhead lines)
at least "swing" and "sag" over it, and not
just be near the property, to be entitled to compensation. It
is a one-off payment, so if compensation has been paid before it
can't be paid again. The claimant just needs to contact
the relevant electricity network operator (not the electricity
company) to find this out. There could also be something
buried in historic wayleaves or other deeds