I had three uninsulated power cables that oversailed my plot for which I had a wayleave agreement. I told EDF, who it was at the time, that I wanted the the cables moved because I was building a house in the garden. They negotiated with the farmer, put two new new poles up and replaced the old cables with an ABC cable. It didn't cost me anything. At my previous house I had a similar problem where old oversailing cables crossed where I wanted to install an LPG tank and EDF replaced the uninsulated cables with an insulated ABC cable, again it was free of cost to me.