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PCA IWCG Members

PCA (Property Care Association)

Japanese Knotweed Ltd are members of the Property Care Association (PCA) Invasive Weed Group. This provides consumers with a means of identifying specialist contractors and consultants who can undertake invasive weed control services which can help control and eradicate Japanese knotweed and other invasive plant species. Accreditation to this scheme demonstrates our professionalism in the industry of invasive weed management, treatment and removal.

TrustMark accreditation


TrustMark is the Government Endorsed Quality Scheme covering work a consumer chooses to have carried out in or around their home.

When a consumer uses a TrustMark Registered Business, they know they are engaging an organisation that has been thoroughly vetted to meet required standards, and has made a considerable commitment to good customer service, technical competence and trading practices.

By ensuring all Registered Business adhere to and maintain these standards through our expert network of Scheme Providers TrustMark gives consumers increased confidence and choice. Additionally, in the event that a problem does arise, TrustMark offers a range of remedies to give further protection to consumers.

CHAS Members

CHAS (The Contractors Health and Safety Assessment Scheme)

Japanese Knotweed Ltd are registered contractors to the CHAS Government backed and SIPP Health and Safety scheme. Each month thousands of contractors and consultants (suppliers) apply for work with public and private sector organisations (buyers). To win work, they must meet the buyer’s health and safety standards.

Assessing suppliers health and safety competence is usually a lengthy and time consuming process. Suppliers can sometimes meet one buyer’s Health and Safety standards but not another. Being CHAS approved reduces duplication as suppliers compliance is accepted by all CHAS buyers.

CHAS assesses applicants:

  • Health and safety policy statement
  • Their organisation for health and safety
  • Their specific health and safety arrangements to a standard acceptable to our buyers and to others

Accreditation to this scheme demonstrates our proficiency to Public, Company, Employer and Employee Health and Safety.

SafeContractor Registered


Japanese Knotweed Ltd are registered contractors to the SafeContractor, SSIP (Safety Schemes in Procurement) Health and Safety scheme. The SafeContractor scheme provides a health and safety audit service for contractors who want to reassure their clients that health and safety is being handled correctly and sufficiently on their sites.

Accreditation to this scheme demonstrates our proficiency to Public, Company, Employer and Employee Health and Safety.

Builders Profile Approved

Builder's Profile

Japanese Knotweed Ltd is registered and approved suppliers on the Builder's Profile Supply Chain Management Assessment Scheme used by companies such as Balfour Beatty and Wates Group.

Builder's Profile is the open-access Common Database service providing compliance and PQQ (pre-qualification questionnaire) information to the construction industry. Our secure Common Database enables subcontractors and suppliers to easily maintain and share information. For main contractors and clients it provides all the information, documents and tools required to manage a supply chain no matter how large or small.

RISQS Qualified

RISQS (Railway Industry Supplier Qualification Scheme)

RISQS, formerly known as Achilles Link-up, has been developed to provide a service for the qualification of suppliers for all products and services that are procured by the industry. RISQS supports Network Rail, LUL/Transport for London, passenger, light rail and freight train operators, rolling stock organisations, main infrastructure contractors and other rail products and services providers in the management of supply chain risk. RISQS is an independent, third party qualification assessment of a supplier’s capability to supply products and services.

Constructionline Gold Members


As a verified member of Constructionline, buyers will recognise that our company aligns to industry and government standards, and is ‘fit-to-supply’ to the construction industry. As ‘Gold Members’ we can demonstrate a ‘high professional standard’ to our clients. We are verified against an extended PQQ (covering Environmental Management, Equalities and Diversity, and Quality Management, and ensuring legislative compliance), and possess a valid SSIP certificate.

Acclaim Health and Safety Accredited

Acclaim Health & Safety

Acclaim Accreditation is the SSIP member scheme provided by Supplier Assessment Services Ltd. Acclaim used the expertise and knowledge of NEBOSH and SSIP assessor qualified professionals to verify our compliance with health and safety legislation.

Achilles UVDB Qualified

Achilles UVDB

Japanese Knotweed Ltd are qualified suppliers on the Achilles UVDB rigorous pre-qualification database. UVDB is the utility industry pre-qualification system used across the UK.

Achilles BuildingConfidence

Achilles BuildingConfidence

Japanese Knotweed Ltd are members of the Achiles BuildingConfidence community. Designed to meet industry and government standards, including PAS91 and Safety Schemes in Procurement (SSiP), BuildingConfidence helps suppliers and buyers reduce risk, streamline procurement and build relationships.

SMAS Worksafe

SMAS Worksafe

An industry recognised approach to Health and Safety Certification. As one of the leading SSIP registered member schemes, the SMAS Worksafe Certificate is recognised nationwide by 000’s of organisations.

Supply Chain Sustainability School

Supply Chain Sustainability School

The School is an award-winning industry-wide collaboration, led by their Partners and Members whose Vision for the School is to be “A world-class collaboration to enable a sustainable built environment”. The eight principles that guide this delivery are set out here and are delivered using four shared values:

  • Collaborative: We share knowledge and resources. Our direction is led by our partners and members
  • Progressive: We deliver measurable impact through dynamic leadership
  • Inspirational: We inspire our members and partners to drive positive change
  • Inclusive: We exemplify respect for the planet, our colleagues and wider society

Get in Touch

We want you to know exactly how our service works and why we need your contact details. Please state that you have read and agreed to these terms and conditions before you continue.
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