BRE is the British Research Establishment, a government funded body and is the main research group in the UK.
The Energy Saving Trust is a government organisation, specifically focusing on the environment with a vast amount of useful information on their website.
This government website has a wide range of information.
The EPC register allows for people to check that an energy assessor is qualified and registered. You can also request an EPC if it is lost by filling a form.
The EPC adviser gives further information about reducing your energy consumption by entering you reference number (RNN) from your EPC.
The communities website is another government website that has publications about laws and guidelines.