Posted: 24/03/2014 at 12:28
A sprinkling of Fish Blood and Bone around the roots and a good layer of mulch will encourage it. I can't really see the top properly - if it's uneven then level it off, it'll look much smarter and it will bush out.
Trim it fairly closely in August - that will make it hold on to it's new young leaves through the winter which will increase your privacy.
If you don't trim it in August most of the leaves will fall making it transparent in the winter.
If it had been allowed to grow up to 10 feet, that may be why it's growth is a little sparse and thin - maybe your neighbours wanted privacy too and knew that trimming it will make it grow thicker.