Chiltern Special Trees and Woods Project
Lots of information about other interesting trees, woods etc in and around the Chilterns.

Little Kingshill Village Society
Find out what else is happening in the village around Priestfield.

The Dendrologist
Website of the newsletter; events diary, information, tips, and links about trees.

Little Friars Arboretum
A small private tree collection in a Chiltern valley at Pednor, near Chesham

Four Seasons Tree Care
People who care for and care about trees.  Worth a look for the slideshow on most pages.
Their blog has an entry about work done at Priestfield.

Organise visits, courses, and provide information about trees and woods in the area.

A large and lively website for the village just up the road.