• Sudden Oak, Larch and Beach decline. Also other species, link will help you identify symptoms for what your tree or shrub is suffering from https://www.rhs.org.uk/advice/profile?pid=329
• Ash dieback otherwise known as chalara fraxinea information https://www.rhs.org.uk/advice/profile?PID=779

•  Chestnut blight https://www.rhs.org.uk/advice/Profile?pid=780
• Royal forestry society http://www.rfs.org.uk

• Arbtalk arboriculture forum with plenty of useful information - www.arbtalk.co.uk
• International Association of Arboriculture - http://www.isa-arboriculture.org/
• Royal Horticultural Society - www.rhs.org.uk
• Tree Preservation Orders (TPO's) basic info - http://www.planning-applications.co.uk/tpo1.htm#whatisatpo
• Waverly Tree Department T.P.O. guidance and help- http://www.waverley.gov.uk/site/scripts/download_info.php?downloadID=353
• Waverly planning information - http://www.waverley.gov.uk/site/scripts/documents.php?categoryID=200074
• Guildford Tree Information - http://www.guildford.gov.uk/index.aspx?articleid=4018
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