Tree surveys & inspections
Although tree-related fatalities are very rare, tree owners have a legal responsibility and ‘duty of care’ to ensure their trees do not pose an unacceptable risk.
Under the Occupiers Liability Acts 1957 and 1984 to ensure that trees situated on their land remain in a safe condition as far as it reasonably practicable. Wharton undertake a variety of survey methods to discharge this obligation.
Tree Assesments
The frequency and detail of a tree survey can vary from a less detailed “walk through survey” to a highly detailed “individual tree survey”. Surveys are individually tailored to meet the specific requirements of each client and follow relevant guidance from the National Tree Safety Groups (NTSG) and Lantra.
The survey information is correlated and recorded using the latest computerised tree management software, GPS (Global Positioning Systems) and GIS (Geographic Information Systems). This ensures that trees are accurately plotted, and all information is systematically recorded.
As an output to our tree surveys, clients are provided with a detailed tree schedule, site plan and report in a format of your choice, which is often provided electronically to reduce cost and the use of paper. We also provide tree management strategies and policies depending on the land owner’s requirements.
All of our consultants and associates who undertake visual tree assessments (VTA) and inspections hold the Lantra Awards Certificate for Professional Tree Inspections. This is an industry recognised certification to ensure inspectors are arboriculturally qualified and competent.


Veteran Tree Surveys & Management
Veteran tree surveys are conducted by our experienced tree survey team in accordance with industry methods and legislation. Our team of experienced consultants at Wharton can provide veteran tree management advice.
Quantified Tree Risk Assessment (QTRA)
The Quantified Tree Risk Assessment (QTRA) system applies established and accepted risk management principles to tree safety management. QTRA quantifies the risk of significant harm from tree failure in a way that enables tree managers to balance safety with tree values and operate to a predetermined limit of reasonable or acceptable risk.
Wharton is a Licensed User of QTRA, which is implemented where appropriate. Additionally Wharton implements other hazard rating systems where the use of QTRA is not considered appropriate. Alternative solutions follow industry best practice and guidance will be discussed with clients prior to any formal instruction.


Internal Decay Detection
Following the initial tree assessment, if the presence of decay causing organisms is suspected, it may be necessary to undertake further internal examinations. Wharton currently has a variety of tools to assess internal decay, including a IML PD400 Resistograph. These tools will assess the extent of decay providing information that, with the latest industry best practice, will enable the most appropriate remedial action to be taken.
Aerial Tree Inspection
In general, all of our tree inspection work is undertaken from ground level, however, where required detailed aerial inspections are undertaken. This type of inspection would be commissioned where decay, large wounds, cavities or splits are detected but cannot be sufficiently assessed.


Tree Work Contracting
Wharton does not undertake in-house tree surgery. We believe this allows an impartial and unbiased assessment, with only the best interests of the client and subject trees at the heart of all recommendations.
Following a tree survey we can, at the client’s request, facilitate quotations, contracts, or specifications from a variety of established contractors to undertake remedial work as necessary.
Wharton has considerable experience in supporting site managers with high levels of public access. We are able to aid the development and implementation of policy in order that the landowner or manager can meet their ‘duty of care’ with regard to both public safety and their environmental policy.
Let’s get started!
We provide the natural advice you need to successfully balance commercial, environmental and human needs, naturally increasing the true value of your land or property.
Our highly qualified team can help you find the most successful natural-infrastructure solutions; minimise the risk to users of their land, form plans to improve ecology and advise construction companies how to work safely around their site.
Understanding the complete constraints and opportunities of any site, whether it be arboricultural, ecological or topographical to name but a few elements, is critical in order to design and plan a successful proposal.
Let’s begin!
Please let us know your contact information alongside with some details about the project
Wharton undertook an initial bat survey which identified suitable areas for roosting bats and evidence of bat activity (droppings).
Wharton undertook a preliminary ecological appraisal, bat activity and emergence/return to roost surveys, and completed a shadow Habitat …
Wharton undertook an initial bat survey which identified suitable areas for roosting bats and evidence of bat activity (droppings).
“Barberry has always found the Wharton team to be knowledgeable and efficient in their input backed with a commercially realistic approach to the development process”
M P Winters - Construction Director, Barberry Group Limited