Website references/Further research
Scottish Government eplanning site - Tree Work Forms:
https://eplanning.scotland.gov.uk/WAM/staticforms.htm?localAuthority=264 
The Scottish Government (2002). Scotland's Native Trees and Shrubs - a designer's guide to their selection, procurement and use in road landscape. (pdf or online version can be accessed at:
http://www.scotland.gov.uk/Publications/2002/06/14891/5708 
of particular usefulness was the appendix located at http://www.scotland.gov.uk/Publications/2002/06/14891/5585 
'The Royal Forestry Society' website: www.rfs.org.uk
(accessed Oct 2008)
'Barcham Trees' website: www.barcham.co.uk 
'Trees Online' website: http://www.trees-online.co.uk/0-c-310.html
(accessed Dec2008)
'Trees for Life' website: www.treesforlife.org.uk
- in particular the following webpage: http://www.treesforlife.org.uk/tfl.contents22.html
(accessed Nov/Dec 2008)
'British Trees' website: http://www.british-trees.com/treeguide/
(accessed Oct/Nov/Dec 2008)