Five sea moss trees were created to go across the centre of the layout. This was relatively quick process, these are 'background' trees after all. The stems were firstly soaked in warm water to re-shape any bent and squashed bits and then left to dry out. Once dry they were reduced to the desired height, well actually they were a bit bigger than planned, but with sea moss that just means lopping off the lower branches making ready made bushes in the process... With hindsight i would have painted the stems with a mix of Halfords matt brown and grey primer aerosols). After that it's just ultra hold hairspray and foliage.
The five new trees and their associated growths form an effective break across the centre of the layout, almost hiding the bridge behind the workshop building. From another view point it can be seen that this is partially achieved by having some growths coming out of the join between the rock face and bridge abutment behind the shed, effectively screening the abutment from view.
From the other side the screening is equally effective, you can hardly see the buildings on the other side. I have added all sorts of extra growths along the path and around the bridge from the stash of smaller branches I had treated alongside the trees.