Our Story

IWA specialises in invasive weed management and ecology. Founded in 2007, by father and son, Nigel and Graham Rudd, IWA has successfully eradicated Japanese knotweed, Giant hogweed, and Himalayan balsam on many sites across the UK including the new Forth Crossing project, London’s Crossrail Project and several large supermarket developments. IWA’s domestic projects have helped clients to sell their properties or secure finances by removing the threat of invasive weeds. As one of the UK’s longest practising ecologists, Nigel Rudd’s experience has led IWA to great success and driven the company to pursue projects with real ecological benefits such as the Japanese knotweed and Rhododendron control for the Argyll Fisheries Trust in order to increase biodiversity and encourage brown trout to spawn in streams previously blocked by weeds.

High Standards

Driven by our desire to offer our clients the best service possible, IWA conforms to the highest standards set by BASIS (the independent authority for the pesticide industry), we are qualified members of the BASIS Amenity Assured scheme. Our BASIS qualified advisor and trainer, Graham Rudd, ensures IWA maintain these high standards while offering the opportunity to educate individuals and companies on invasive weed management as a commitment to Continuing Professional Development (CPD).

Read more about our qualifications…


We are members of and on the steering committee for the Invasive Non-Native Specialists Association (INNSA). INNSA is the industry body for companies controlling and eradicating invasive non-native species in the UK. INNSA aims to improve the standards within the industry and offer peace of mind to clients.

Invasive Weeds Agency is proud to have achieved the following standards in order to provide the best possible service for our clients whilst maintaining the highest levels of safety:


Our Team

Nigel Rudd BSc (Hons), CBiol, MSB, CMLI
Nigel Rudd BSc (Hons), CBiol, MSB, CMLIDirector
Nigel provides ecology expertise, training and supervision.
Get In Touch
Graham Rudd
Graham RuddBusiness Manager
Graham manages the day-to-day running of IWA. Graham holds the BASIS Certificate in Crop Protection (Amenity Horticulture) and is a Property Care Association Certificated Surveyor of Japanese Knotweed.
Get In Touch
Jed Van Hagen
Jed Van HagenProject Office
Jed has been worked in the invasive weed control industry since 2011. Jed has a BASIS qualification in invasive and injurious weeds as well as being a qualified Property Care Association Certificated Surveyor of Japanese Knotweed. Jed’s on-site experience in the management of invasive weeds ensures that IWA continues to offer excellent value for money to our clients.
Get In Touch