Accreditation & Certification

Andrew Sinclair strives to continually improve Health & Safety & Quality and enjoys various memberships and accreditation with industry recognised bodies. This ensures Andrew Sinclair is keeping up with best industry practice.

Water Industry Registration Scheme

The Water Industry Registration Scheme is for contractors who provide new connections to the existing water supply or sewerage system. These are referred to as “self-lay” organisations or SLOs.

Lloyds Register operate the Water Industry Registration Scheme (WIRS) on behalf of water utility companies and are one of the world’s leading providers of professional services for engineering and technology – improving safety and increasing the performance of critical infrastructures worldwide.

In order to be WIRS accredited, the companies undergo technical assessments from Lloyd’s Register. We assess several areas, including design, construction, connections, commissioning and project management. By becoming WIRS accredited, companies don’t need to be approved by 22 separate water companies.

A WIRS accredited self-lay organisation may perform works on the connection of water mains and supplies to a property, dependent on the status and scope of accreditation.

Andrew Sinclair Ltd are accredited to carry out work as follows

  • CMS Construction of Mains and Services (All Works)
  • CRMC Construction of Routine Mains Connections
  • CNRBC Construction Non-Routine Basic Branch Mains Connections
  • CNRCC Construction Non-Routine Complex Mains Branch Mains Connections
  • ERMIM External Routine Meter Installation Maintenance
British Assessment Bureau OHSAS18001: 2007


We are currently certified for OHSAS18001: 2007 Occupational Health & Safety.

OHSAS 18001 will soon be replaced by ISO 45001, the new health and safety standard that is internationally recognised and promises to make the workplace even safer.

Following their successful 3-year recertification audit in October 2019 work is now in progress to migrate to the new standard ISO 45001 Health & Safety Management System.

Certificate of BSI Membership


BSI is the business standards company that helps organizations all over the world make excellence a habit. For more than a century we have been challenging mediocrity and complacency to help embed excellence into the way people and products work. That means showing businesses how to improve performance, reduce risk and achieve sustainable growth. As a global leader in helping organizations improve, our clients range from high profile brands to small, local companies in 182 countries worldwide.

Scottish Plant Owners Association

SPOA is a trade association whose members are all interested in the business of owning and hiring plant used in the UK construction industry. there are more than 250 member organisations.

A main area of emphasis is on the training requirements imposed on plant operators and the Executive Committee closely monitors developments in the Construction Skills Certification Scheme (CSCS) and Construction Plant Competence Scheme (CPCS).

National House Building Council

NHBC Registration Number 92784

Andrew Sinclair Limited have been an NHBC registered builder since 2008

NHBC requirements

All builders registered with NHBC must meet the NHBC requirements. These are contained in the NHBC Standards, which are available at NHBC inspect homes at key stages while it is being built. If NHBC are satisfied with the standard of work they see during their inspections, a Buildmark confirmation of cover is issued to the builder when a home is completed. NHBC will also issue a Buildmark certificate to the first owner when they accept the Buildmark offer.

Federation of Small Businesses

Membership Number 1093117

Andrew Sinclair have been a member of the FSB since 1993