Policy information sourced from the Hillingdon Local Plan: Part 1

OL26 Protection and Enhancement of Trees, Woodland and Landscape Features

The local planning authority will protect trees and woodlands and encourage the preservation, proper management and in appropriate locations the extension of woodlands. Proposals for development in the more rural areas of the borough should be accompanied by proposals for landscaping and tree planting wherever practicable, and the retention of existing landscaping features where appropriate. 

For more information please see Appendix 5 of the Local Plan: Part 1