Department for Business, Energy & Industrial Strategy
The department reflects the fact that climate change and energy policies are inextricably linked – two thirds of our emissions come from the energy we use. Decisions in one field cannot be made without considering the impacts in the other.

Distribution Connection and Use of System Agreement (DCUSA)
The Distribution Connection and Use of System Agreement (DCUSA) was established in October 2006 as a multi-party contract between the licensed electricity distributors, suppliers and generators of Great Britain. It is concerned with the use of the electricity distribution systems to transport electricity to or from connections to them. The DCUSA replaced numerous bi-lateral contracts, giving a common and consistent approach to the relationships between these parties in the electricity industry. It is a requirement that all licensed electricity distributors and suppliers become parties to the DCUSA.

ElectraLink is responsible for the provision of the Data Transfer Service to all parties participating in the electricity retail market, under the terms of the Data Transfer Service Agreement.

Ofgem is the regulator for Britain's gas and electricity industries. Its role is to promote choice and value for all customers.