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Due to the impact of Covid-19 (Coronavirus), the Pembrokeshire Coast National Park Authority has closed its headquarters, visitor attractions (Carew Castle, Castell Henllys and Oriel y Parc), its car parks and sections of the Pembrokeshire Coast Path until further notice. All meetings and events are cancelled until further notice. If you have any queries please call 01646 624800 or email

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Home » Looking After » Conservation Land Management » Invasive non-native species » Park Authority INNS Policy

National Park Authority INNS Policy

Pembrokeshire Coast National Park Authority (PCNPA) does not have a statutory duty to control INNS in the National Park. Its involvement in the control of INNS relates to its capacity as a landowner and its maintenance of public rights of way. Please note, the National Park Authority owns only 2% of the land area of the National Park.

PCNPA will endeavor to control INNS on its land holdings, to ensure that public rights of way are clear of surface vegetation and are INNS free where sustainable. It will also initiate awareness and facilitate dialogue amongst interested parties when applicable.

The Authority does recognize the threat INNS poses to the wider landscape of Pembrokeshire and is currently delivering a catchment pilot project (Stitch in Time) funded by the Welsh Government in the Gwuan Valley.

Japanese knotweed on the banks of a tributary of the River Gwaun.​
Japanese knotweed on the banks of a tributary of the River Gwaun.​

The Park Authority’s capacity to manage INNS outside the management of its assets and this pilot project are minimal and subject to priorities in terms of a particular nature conservation interest, historic environment interest, spread by access/public rights of way, or where the species is harmful to human health and/or where short term action is strategic and sustainable.

The Authority’s priority for INNS management lies within the Wales/Pembrokeshire priorities species for control as well as maintaining vigilance for national and regional alert species published by the Non-native Species Secretariat and Natural Resources Wales.

The Park Authority’s Stitch in Time project coordinator can provide advice but stresses that dialogue, cooperation and commitment is key for all parties involved with INNS issues.

Pembrokeshire Coast National Park Authority is keen to hear from interested community groups and landowners where a cooperative coordinated approach can be delivered. Please email for more information.