Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Great Britain definition

What does Great Britain mean? In legal drafting and statutory contexts, Great Britain describes England, Wales and Scotland (including their smaller offshore islands), and excludes Northern Ireland and the Crown Dependencies (the Isle of Man and the Channel Islands). It is principally a geographical expression rather than a term of art. Many UK statutes and regulations use “Great Britain” to set territorial extent or application, and individual enactments may state expressly whether adjacent waters or specified islands are included. There is no single universal statutory definition; scope is set by the instrument in question. Typical uses include: defining the territorial extent of legislation (for example,...

Great Britain electricity codes: legal framework, BSC balancing and settlement, Grid Code, CUSC, Distribution Code/DCUSA, modification procedures, NESO/ELEXON roles, and Energy Act 2023 governance reforms

Published by a LexisNexis Energy expert

Practice notes

What is the legal basis of key industry codes in the GB electricity market?

The cornerstone statute governing the electricity industry in mainland Great Britain (GB) is the Electricity Act 1989 (EA 1989), which established the structure of the market we recognise today. Since it came into force, the EA 1989 has undergone numerous amendments arising from various UK government policy developments and, prior to Brexit, measures originating from the EU, as incorporated into the consolidated version of the EA 1989 linked in this Practice Note. The EA 1989 sets out a regulatory regime that mirrors the standard model adopted by other regulated utility industries in GB; namely, it is prohibited to undertake specified activities connected with, in this instance, electricity, unless the person is properly authorised to do so. For further detail on the regulatory regime for the GB electricity market, see Practice Note: An Introduction to Electricity Licensing in Great Britain. Authorisation in this case means either the grant of a licence under the EA 1989, or availing of an exemption from the requirement to hold a licence (as provided by way of statutory instruments made under EA 1989, s 5)...

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Web page updated on 28/05/2026

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