With over 30 years experience, CORGI is considered the leading authority for information on gas safety issues around the home. Today, CORGI also provides information and support for other trades including plumbing and electrical work.
CORGI was founded in 1970 to protect the public from the dangers of unsafe gas installations. We are acutely aware that poorly trained tradesmen can give the industry as a whole a bad name and bad experiences can make people extremely wary when it comes to employing someone to install or repair a gas appliance.
http://www.trustcorgi.com/consumers.htmx

About Hetas

HETAS Ltd is a company, without share capital, limited by guarantees and governed by a Council, the equivalent of a Board of Directors, which makes policy and supervises the running of the company and the operation of the scheme.
http://www.hetas.co.uk/