Trees on A415 verge behind our house

We selected the hedgerow option because the trees in question were not indicated on the map. These trees on the side of the A415 have grown to such a size now that they almost overhang our property. During the very high winds this winter, I was concerned as they appeared quite unstable. We recently contacted a local tree surgeon about a tree in our garden and also asked them to look at these overhanging trees as well. We were told by him that we would need to report these trees to yourselves in order to get them trimmed back. I am therefore doing that here, in the hope that they can be cut back before they do become a danger to our property or the A415.