They should get 'rent' from the electricity board, this might be paid annually, or it might have been a lump sum. They do fizz when it's drizzling. We had one about 60mtrs away. When they eventually got round to taking it down (cables had been buried) the footprint was tiny, just sort of 6"x6" concrete squares. It only took about 1/2 day. After about 10 days you couldn't see where it had been.