I specialise in all aspects of invasive plants, including their ecology, impact, treatment, control and management. This includes surveying, identification, evaluation and mapping. I have substantial experience in the development of appropriate and effective management strategies for invasive plants. I have been working generally with invasive plants since 1983 and specialised in Japanese knotweed from 2005 to the present date. I was the lead author in writing the textbook on invasive bamboos, which was published in 2021. I have expertise with most invasive terrestrial weeds, including but not...

Dan is Managing Director at Advanced Invasives and an Honorary Research Associate at Swansea University. He has been instructed as an expert in more than 40 legal cases UK-wide, ranging from rural landholdings through to multimillion-pound development sites. Uniquely, Dan is both a full Member of The Academy and a Certified Expert Witness. His specialist areas of expertise include: • Invasive plant identification, survey and mapping; establishing contamination with determination of spread and dispersal. • Assessment of Japanese Knotweed growth and spread with relati...