Display Energy Certificates
It is mandatory for every public building, with a useful floor area of more than 250m2, to have a Display Energy Certificatge and Advisory Report.
These display the buildings energy use over the past 3 years, and they must be displayed in an area visible to the public.
The purpose of these certificates is to encourage sites to reduce their energy consumption each year.
Every DEC is available on the national register - https://www.ndepcregister.com/