Trevor Renals

Environment Agency

Trevor Renals has over 20 years’ experience in Japanese knotweed management. He instigated the Cornwall Knotweed Forum in 1997, which became a precursor to the wide variety of Local Action Groups currently engaged in invasive species management. He wrote the Environment Agency Japanese knotweed code of practice and the current regulatory position statement on invasive plant management and disposal.

He is a member of the GB Biological Control Steering Group as well as a variety of other national working groups concerned with invasive species management and biosecurity. He is currently the senior national technical advisor on invasive species for the Environment Agency. His role covers a broad range of invasive non-native plants and animals associated with aquatic and riparian freshwater and marine habitats.

dont miss

The Japanese knotweed invasion, past, present and future.

An account of the 150 year history of Japanese knotweed; how it spread and what has been done to address that invasion. What are the lessons that we can derive from the knotweed invasion and what the future might hold for knotweed management in the UK.


  • Robert Mitchell: Speaking at the Contamination Expo

    Robert Mitchell - There is more to invasive weeds than Japanese knotweed.

  • Phil Wade: Speaking at the Contamination Expo

    Phil Wade - Construction phase geotechnical database systems

  • Paul Cave: Speaking at the Contamination Expo

    Paul Cave - Monitoring Hazardous Substances During Land Remediation

  • Dr. Kevin Leahy : Speaking at the Contamination Expo

    Dr. Kevin Leahy - Innovation in site characterisation to reduce project risks and lifecycle costs

  • Dr Chris Stopford: Speaking at the Contamination Expo

    Dr Chris Stopford - Real-time detection of airborne asbestos..