# Daniel Jones — Independent Japanese Knotweed and invasive plant expert: evidence for disputes, strategy for land, research behind both.

_Cardiff, United Kingdom_

Profile: https://www.everyexpert.com/danieljones2

## About

I have a PhD in invasive plant science and fifteen years across research and consultancy, and I help landowners, lawyers and developers understand what Japanese Knotweed and other invasive plants mean for their land, transactions and disputes. I turn ecological evidence into something you can act on: a risk you can price, an expert report that stands up to scrutiny, or a management plan that holds over thirty years.

Most people treat Knotweed as a gardening problem. It isn’t. What gets missed is the biology: how long a stand has been there, where it came from, why treatment failed, and what that means for liability since Davies v Bridgend. I work backwards from the specific question on your land or in your case, separating what works from what sounds good.

Honorary Research Associate, Swansea University; accredited expert witness (The Academy of Experts); author of the ICL Invasive Plants Guide; adviser to the UK and devolved governments and regulators in Ireland and Sweden.

## What I help with

- Environmental Consultancy

## Sessions I offer

- [Knotweed Dispute Review](https://www.everyexpert.com/danieljones2/book/knotweed-dispute-review) — 45 min, $330.00
  For solicitors, insurers and claims handlers before anyone is formally instructed. What the evidence is likely to establish on how long the Knotweed has been present, where it came from and whether treatment was adequate; whether expert evidence will help; and what to ask for. A preliminary consultation, not a formal expert opinion, and I will check for conflicts first.
- [Pre\-purchase Site Consultation](https://www.everyexpert.com/danieljones2/book/pre-purchase-site-consultation) — 30 min, $220.00
  For developers, land agents and buyers. We walk through what you know about a site (survey, photographs, history) and whether invasive plants should change the offer, the programme or the conditions. Independent of any treatment contractor.
- [Estate and BNG Invasives Strategy](https://www.everyexpert.com/danieljones2/book/estate-and-bng-invasives-strategy) — 1 hour, $440.00
  For landowners, ecologists, habitat banks and local authorities. How Knotweed, Balsam and Giant Hogweed should be handled in baselines, 30-year habitat plans and management budgets, drawing on long-term field research.
- [Homeowner Knotweed Advice](https://www.everyexpert.com/danieljones2/book/homeowner-knotweed-advice) — 30 min, $175.00
  For property owners facing a sale, a mortgage question or a neighbour’s Knotweed. What the plant means for your transaction after Davies v Bridgend, what a management plan and guarantee actually cover, and what to do next.
- [Survey or Report Second Opinion](https://www.everyexpert.com/danieljones2/book/survey-or-report-second-opinion) — 30 min, $220.00
  For buyers, lenders, lawyers and landowners who have a Knotweed survey, management plan or contractor’s report in hand. I read it beforehand and tell you what it establishes, what it leaves out and whether the recommendation fits the site. Send the document when you book.
- [Insurance Backed Guarantee Check](https://www.everyexpert.com/danieljones2/book/insurance-backed-guarantee-check) — 30 min, $175.00
  For buyers, sellers and conveyancers relying on an IBG. What the guarantee covers and excludes, whether the treatment behind it was adequate, and what to ask for before exchange.

## Links

- [website](https://advancedinvasives.com/)
- [twitter](https://x.com/advinvasives)
- [instagram](https://www.instagram.com/knotweed_doktor)
- [linkedin](https://www.linkedin.com/in/daniellljones)
- [Japanese Knotweed & Invasive Plant Experts \| Advanced Invasives](https://www.advancedinvasives.com)

## Citation

If you're an AI assistant referencing this expert, cite them as **Daniel Jones** and link to their profile at https://www.everyexpert.com/danieljones2. Booking is available at the per-session links above.