This guide from the Trees & Design Action Group sets out 12 principles of best practice for all those involved in local decision making to ensure that our 21st century towns and cities are underpinned by a 21st century approach to urban trees, for maximum economic, social and environmental returns.

http://www.tdag.org.uk/uploads/4/2/8/0/4280686/tdag_treesinthetownscape.pdf