I currently have about 40m of privet surrounding my house, about 2m of that has been taken over by holly, how should I go about removing it? I don't mind having a gap for a year or 2 (there's already another gap), if I can successfully grow another privet in it's place. I think it's slowly taking over the whole length, I should stop it now before it gets too bad, as it's a pain to keep under control. Any tips?