Update 20 March 2016:
This bougy seems to like sending up long tracts. I'm just lopping off the ones which grow on the 'wrong' angle. Trying to keep it all lined up with the fence. There has definitely been growth - it's becoming bushier and looks healthy. New leaves have a pretty pink blush around their edges. Gave it some blood and bone this weekend.
Update 15 October, 2016:
Look how well she's doing now! I have seen them clipped like a hedge, so will probably do this for this pretty baby.