Arboricultural Association.	The Arboricultural Association was established in 1964. They are aimed at increasing the study of Arboricuture and raising the standards in the industry.
International Society of Arboriculture	The International Society of Arboriculture (ISA) is the worlds biggest group of professional arborists with over 14,000 members distributed throughout 38 "chapters" across the 5 continents.
National Proficiency test council	Part of the City & Guilds Group.
Health & Safety executives	The UK Health and Safety Commission (HSC) and the Health and Safety Executive (HSE) are responsible for the regulation of almost all the risks to halth and safety arising from work activity in Britain
Royal Forestry Society	The Royal Forestry Society started back in 1882 with 4 member. As a registered charity They now have over 4000 members dedicated to the wise management of trees and woodlands,and to increasing people's understanding of forestry.
Arboricultural Information Exchange	An amazing website with an abundance of Arb information and findings presented by Chris Skellern.