Worcester Bosch Group:
http://www.worcester-bosch.co.uk/

Institute of Plumbing and Heating Engineers
http://www.iphe.org.uk/

CORGI is the National Watchdog for Gas Safety in the United Kingdom
http://www.corgi-gas-safety.com/

Gas Health and Safety
http://www.hse.gov.uk/gas/domestic/index.htm

Ofgem is the regulator for Britain's gas and electricity industries.
http://www.ofgem.gov.uk/ofgem/index.jsp

Scotia Gas Networks is the holding company of
Scotland Gas Networks & Southern Gas Networks.
http://www.scotiagasnetworks.co.uk/

The economic regulator for the water and sewerage industry in England and Wales
http://www.ofwat.gov.uk/

energywatch is the independent watchdog
for gas and electricity consumers.
http://www.energywatch.org.uk/

Centre for Sustainable Energy
http://www.cse.org.uk/

Help with energy efficiency
http://www.est.org.uk/myhome/

Trade association for electricity companies
http://www.energy-retail.org.uk/

Includes energy efficiency advice centres
http://www.est.org.uk/

Grants Available for Energy Efficiency
http://www.est.org.uk/myhome/gid/index.cfm?sec=1

Campaign for warm homes
http://www.nea.org.uk/