The EPC was lost in the HIP these measures are a start in achieving the original aims of the EPC – that of improving the carbon footprint of properties and energy efficiency and compliance is still a major issue.

All energy certificates (EPCs and DECs) and associated recommendation reports or advisory reports must be entered into a central register maintained on behalf of the Secretary of State. There are two separate databases within the register, one for dwellings and the other for non-dwellings.
Role of Accreditation Schemes
Energy assessors are required to be a member of [...]

Public Authority or Institution providing public services occupying a building
A. Occupation in a single building >1000m2

Occupation in parts of a building, designed or altered to be used separately, where a part is >1000m2

Occupation in parts of a building, designed or altered to be used separately, where no part is >1000m2

In each case, the part must [...]

What contributes to the operational rating of a building
An operational rating (OR) is a measure of the annual CO2 emission per unit of area of the building caused by its consumption of energy, compared to the value that would be considered typical for that particular type of building.
Factors that contribute to the operational rating include:

Building [...]

Responsibilities for displaying a Display Energy Certificate
Under this legislation it is the responsibility of every occupier of a building affected by these Regulations to:

Display a valid DEC in a prominent place clearly visible to the public at all times; and

Have in their possession or control a valid advisory report which conveys recommendations to improve [...]

What are Display Energy Certificates?
A Display Energy Certificate shows the energy performance of a building based on actual energy consumption as recorded annually over periods up to the last three years (the Operational Rating). The DEC also shows an Asset Rating for this building if this is available (by way of an EPC). A DEC [...]

Why Display Energy Certificates are required
The purpose of introducing Display Energy Certificates (DECs) is to raise public awareness of energy use and to inform visitors to public buildings about the energy use of a building. DECs provide an energy rating of the building from A to G, where A is very efficient and G is [...]