The following resources may be of interest to you:
Organic Certification Bodies:
The Soil Association was founded in 1946. It is the UK's leading membership charity campaigning for healthy, humane and sustainable food, farming and land use.
Organic Farmers & Growers (OF&G) is a leading UK organic control body with a reputation for practical, efficient and friendly service.
Aromatherapy Institutes & Professional Organisations:
Is the first and largest governing body in Clinical and Holistic Aromatherapy since 1985.