Invasive Non-Native Species

The PBA is working with Wessex Rivers Trust to ensure riparian owners can confidently identify and deal with Invasive Non-Native Species (INNS) plants that might be growing in or along the Pillhill Brook. Liaising with Wessex River Trust and leading this work on behalf of the PBA Steering Group is Alan Ollerhead.

Funded by Wessex Rivers Trust Supported by PBA volunteers

At the PBA's 3rd Annual Meeting on 25 April Courtney Brain Wessex Rivers Trust Test and Itchen Invasive Non-Native Species Project Co-ordinator shared her plans for tackling INNS along the Pillhill Brook.

250426_PBA_INNS_Presentation

Slide Presentation given at the PBA 3rd Annual Meeting on 25 April 2026

First steps

With the access permission of our riparian owners the first step will be a full survey of the Pillhill Brook from its source in Kimpton to its confluence with the lower Anton in Upper Clatford. From this survey a detailed catchment plan for our brook will be produced. Survey dates are Tuesday 30 June and Thursday 2 July.

Wessex Rivers Trust have produced a really useful Guide on Invasive Non-Native Species for the Test and Itchen which talks about how to identify 15 species threatening our rivers and some common sense biosecurity protocols. However we will be focusing on the four INNS plants that previous volunteer surveys have found. Click on the image opposite to access the guide or email us at pillhillbrook@gmail.com to request a hardcopy.

Project booklet_Invasive Non-Native Species Guide The Test and Itchen (Jan 2026).pdf

Focusing on 4 Invasive Non-Native plant species

Monkey Flower

Himalayan Balsam

Orange Balsam

Japanese Knotweed

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