Huge tree behind 172 kimbolton, needs cutting back

Customer has called up to report a tree. It is huge and behind 172 kimbolton on the public land. When the branches fall they all fall in to the little sidewalk. She also has 6 silver birch trees that over hang her garden and are 30ft above her property. They are behind her property of 165 kimbolton on public land, next to the other huge tree. They need pruning/cutting back as they are getting out of control.