View our members

Here you’ll find a full list of INNSA members. You can find a more detailed company profile which includes accreditations, qualifications held, which locations covered and all species dealt with, when you click read more under each profile.


Invasive Plant Company

Accredited Contractor and Consultant Member

The Invasive Plant Company is a specialist in treating and eradicating Japanese Knotweed and other Invasive Non Native Species. We work nationally from our 3 offices in Manchester, Liverpool and Glasgow. The Invasive Plant Company is backed by it’s Parent Company, The LK Group, who are a large Environmental Consultancy and specialise in Herbicide, Excavation, Volume Reduction and Root Barriers and many other types of remediation and control. Our Parent Company has been trading since 1997 and we are proud of our reputation in treating Japanese Knotweed and other Invasive Species.

Invasive Plant Company

Company: Invasive Plant Company

Company Type: Accredited INNSA Contractor Member

Accredited: Yes

Address: Unit 29 Eton Business Park, Eton Hill Road, Radcliffe, Manchester, M26 2ZS UK

Contact: Conor Leyden

Tel: 0161 763 7200

Position: Director

Locations: All Regions

Clients- Private Individuals: Yes

Clients- Business:Yes

Waste Carriers License: Yes

Environmental permit: Yes

PI Insurance: Yes

Employers Liability Insurance: Yes

Hired in plant insurance: Yes

Public Liability Insurance: Yes

Number of Staff: 7


Email: [email protected]

ISO 9001:2008: Yes

ISO 14001: Yes


First Aid: Yes

H&S: Yes



Asbestos Aware:Yes

CAT Scan Cert: Yes

Forward Tipping Track Dumper: Yes

Dedicated In-house Surveyors: Yes

Relevant Degrees or professional qualifications: Yes

Relevant Degrees or professional qualifications details: Colin Crompton – BSc Hons Environmental Sciences, MSC, CEnv Paul Quimby – Phd, BSc Hons Environmental Sciences, CEnv Mike Inman – BSc Hons Environmental Biology Conor Leyden – BSc Hons Building Surveying Richard Hyde – BSc Hons Teaching and Learing Development Andy Robinson – HNC Civil Engineering, NVQ Construction, Contracting and Opertional Management

PA1: Yes

PA6: Yes

PA6AW: Yes

Chainsaw: Yes

Brushcutter: Yes




Japanese Knotweed (Fallopia japonica)

Giant Hogweed (Heracleum mantegazzianum)

Himalayan Balsam (Impatiens glandulifera)

Cotoneaster (Cotoneaster species)

Floating Pennywort (Hydrocotyle ranunculoides)

Horsetail (Equisetum species)

Japanese Rose (Rosa rugosa)

Marestail (Hippuris vulagaris)

New Zealand Pigmyweed (Crassula helmsii)

Parrot’s Feather (Myriophyllum Aquaticum)

Ragwort (Senecio jacobaea)

Rhododendron (Rhododendron ponticum)


Case Studies

River Douglas, Wigan

River Douglas, Wigan Treatment of large amounts of Japanese...
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Narvick Way, North Tyneside

Narvick Way, North Tyneside Excavation from construction area, with...
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Lanark Way, Belfast

Lanark Way, Belfast Site survey and treatment plan for...
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