I've come across this offer from the Woodland Trust which may be of interest to community groups (but you need to be quick - closing date for applications is 13th September):
Every autumn our tree packs are available for community groups to receive. These packs are free but you must hold a public planting event as we want to see as much community engagement as possible. You must have landowner’s permission to plant trees and plans in place for maintenance. They come in three sizes: small (30 trees), medium (105 trees, suitable as hedge or copse) and large (420 trees, ideal for approx one acre).
The small packs come with a choice of two themes:
The medium and large come with a choice of five themes for you to choose from:
For more information about the community tree packs click here.
Woodland Creation Project Officer