Microgeneration Certification Scheme (MCS) providing greater protection for consumers and ensuring that the Government's (i.e., taxpayers) grant money is spent in an effective manner.

https://www.mcscertified.com

Renewable Energy Consumer Codesets out high consumer protection standards for businesses who are selling or leasing renewable energy generation systems to domestic consumers. RECC is approved by Chartered Trading Standards Institute as part of the Consumer Codes Approval Scheme and is also a Trustmark Scheme Operator.

https://www.recc.org.uk

NAPIT stands for National Association of Professional Inspectors and Testers. ... NAPIT promotes safe and quality work practices throughout range of electrical trades. NICEIC. NICEIC used to stand for National Inspection Council for Electrical Installation Contracting.

https://www.napit.org.uk

Trustmarkis the Government endorsed Quality Scheme covering work a consumer chooses to have carried out in or around their home.

https://www.trustmark.org.uk

CHAS is established as the market leader for health and safety pre-qualification in the UK. It is a non-commercial scheme available to suppliers (those who provide goods and services) and to organisations (buyers) looking for suitably competent suppliers.

https://www.chas.co.uk