A useful planning guide by the Woodland Trust.
"With over 80 per cent of the population living in towns and cities, it is critical that Local Planning Authorities and developers step forward to ensure they are healthy, happy and productive places to be. These communities need to be multi-faceted and resilient to the challenges posed by climate change, an ageing population, the obesity crisis and increasing budgetary constraints. The importance of trees and green space in delivering high quality places to live, work and spend leisure time is now widely recognised. These vital spaces can be taken for granted but add significant value to developments in terms of social, economic and environmental benefits. Integrating trees and green spaces into developments early on in the design process minimises costs and maximises the benefits they can provide."