Posted: 20/04/2017 at 22:48
You won't be able to remove them later as you will need a pick axe and probably disturb the roots of the others. But if you want them like that, it's up to you, but I would absolutely advise you to cut them by half all along the row.
Do it now, level right along the row with a sharp pair of secateurs. If and when they do start growing again, keep picking out the tops and the ends of the side shoots, I know it sounds drastic and you are keen for a quick hedge, but they will benefit from this treatment in the long run.
i haven't got a photo of mine at the moment, but looked after now will give you a lovely hedge in about three years time.