Associate members are made up of arboricultural related companies, other organisations. Many of our associate members are Arboricultural contractors and consultants or nurseries. This category does not include Local Authorities nor individuals.

One of the major benefits of associate membership is access to the member's area of the website. Another benefit is being able to attend LTOA seminars. These half or full day seminars are free of charge to members and take place 4 or 5 times a year. Please see some of the previous agendas to get an idea of the subjects covered. Numbers attending are limited to two members of staff per organisation.

The annual subscription to join as an associate member is £296 for 2017 - 2018. If you are a small voluntary charity or educational establishment membership is free with a limited membership service (but not for larger charities who have paid staff), although we charge £50 each person to attend any of the LTOA seminars if there are enough places.

To join as an associate member please apply in writing via email to executive.officer@ with a few paragraphs at the most why your organisation or company wants to join the LTOA. This application will be considered by the LTOA Executive Committee. Once your membership has been approved please email the Executive Officer to find out the details for paying the subscription.

Student associate members:

Student members will need to provide the email address of their course tutor and fill out the appropriate form available here. Please note students have limited membership for £20, access the London Tree Officers Association website at and the members forum. Membership allows attendance at two of the LTOA seminars a year which need to be booked in advance with the Executive Officer. Student places for each seminar are limited and are allocated on a first come, first served basis.

Click here to view our current Associate Members

Associate Member benefits


Associate Members have the opportunity to send up to two representatives to four LTOA seminars per year, at no additional cost. These cover a range of topics, and have recently included pests and diseases, climate change, subsidence, British Standards and new initiatives in urban tree management. Seminars can be noted on Personal Development Review files or other records such as Investors in People.

Associate Members can have access to other seminars held by insurers and land management organisations either free of charge, or at a reduced cost. These seminars present Members with an invaluable opportunity to extend personal working knowledge with others in the industry and gain a better understanding of best practice in terms of arboriculture, team management and contract management.

Continuous Professional Development (CPD)

LTOA seminars count as CPD for the following organisations and categories:

Arboricultural Association: Under category 'Conferences (C)' which includes conferences, seminars, workshops or other technical and professional events and meetings.

Institute of Chartered Foresters: Under 'Structured Learning' in the category for conferences, meetings, discussion groups and seminars organised by other bodies.

IEEM: Under 'Structured and Led Learning Events'.

RICS: Field meetings can be counted towards either 'Personal and Informal Learning' or may come under 'Courses, Conferences and Seminars’.

Guidance and support

Associate Members have access to the Executive Officer - during normal office hours - to seek information and guidance with regard to any issues or general enquiries.

Other guidance includes:

  • Access to a professional and comprehensive website (, featuring a members only section and a members only discussion forum.
  • LTOA guidance documents for tree professionals, covering topics such as the Surface Materials around Trees in Hard landscapes, Risk Limitation strategy for tree root claims, CAVAT, OPM management and dog damage to trees.
  • LTOA information leaflets include cover subjects such as the benefits of trees, guidance for managing brown tail moth infestation, tree roots and structures, pruning, and high hedges to name a few.

Industry influence

The LTOA has an established presence on numerous groups including the Trees and Design Action Group TDAG), engaging with the wider industry about important subjects relating to urban tree management. The LTOA is also represented on British Standards Institution working groups including BS3998: Recommendations for tree work, BS5837: Trees in relation to construction, the new BS8545 on young tree establishment and the National Joint Utilities Group.

Members have the opportunity to join and initiate working parties to focus on current issues. Ongoing working parties include those investigating Oak Processionary Moth, biosecurity and trees & human health to name but a few.

Job vacancies

As an associate member your organisation can advertise up to three job vacancies in a year on the LTOA website for free.

The LTOA website is sponsored by:

How to Become a Member

Members can attend, for free, the LTOA meetings which are held four times a year and cover a wide range of tree related matters.

Click here to find out how to become an associate member