We are having the same issue with SP, we want a cable moving that will be under our slab, we negotiated down to 7.5k, its a 3phase 11kv coming from a pole in the corner of our plot, i have to say their legal department is inept, the frustrating thing is there is no Wayleave as it expired on selling to us and SP will no longer enter into new Wayleaves but go down the Easement route which is going to take 3 months, our solicitor has said they perfer the easement route as its permanent