In late July rather later than I might have preferred I trimmed our topiary hornbeam hedge. The long new season growths had increased the size of the hedge by about 2 feet. I like my hedge to have a formal shape although one of the glories of the Hornbeam is that it becomes very informal during the growing season.
However I leave a Mohican of long growth on the top or the hedge to give extra privacy and informality, I find trimming a shoulder accentuates the longer growth. Along the hedge are shapes on stems. Inside in our garden is an arch linking with a Yew hedge and an arbour projecting out both formed the hornbeam hedge. The front picture is looking into an arch from the road.
The picture below is the neatly trimmed hedge on our shared drive, which give our neighbours a stimulating view as they pass it !