The Natural Death Centre (http://www.naturaldeath.org.uk) established the Association of Natural Burial Grounds in 1994. By requiring members to comply with their Code of Conduct the ANBG provides the public with the assurance of best practice at member sites.

This link will take you to a list of Natural Burial Grounds

http://www.naturaldeath.org.uk/index.php?page=find-a-natural-burial-site

Woodland Burials in the UK (http://woodland-burial-grounds.50webs.com) features more information on Natural Green Burials.