Aditi Tulpule

This Practice Note provides a detailed overview of the key participants in the Great Britain electricity market. This Great Britain (GB) electricity market overview covers the principal organisations/types of organisation involved in the generation, transmission, international interconnection, distribution, and supply of electricity (electricity wholesale market, electricity retail market, and electricity networks market). It also provides details of those who regulate and administer the main controls, industry codes, support mechanism and policies seen in the electricity market.

This Practice Note summarises the various roles of National Grid, and National Grid owned bodies, in the GB energy market. It includes discussion of National Grid Electricity Transmission plc (NGET), National Grid Gas (NGG), ELEXON, National Grid as Electricity Market Reform (EMR) Delivery Body, and National Grid plc. It also includes coverage of distinction between National Grid’s electricity transmission owner (TO) and electricity system operator (SO) roles and the anticipated upcoming split of these TO and SO roles between NGET and the newly incorporated National Grid Electricity System Operator Limited (NGESO).