Great Britain (GB) bidding zone

Great Britain left the EU internal energy market in January 2021 and is no longer part of SDAC day-ahead coupling; interconnector capacity is allocated through separate arrangements rather than implicitly. GB is the only zone in this registry clearing in GBP, and it settles in half-hourly periods rather than hourly ones.

Reference data

Zone code: GB
Name: Great Britain
Country: GB
Region: Great Britain
EIC: 10YGB----------A
Delivery-day timezone: Europe/London
Clearing currency: GBP

The Energy Identification Code is the in_Domain / out_Domain value that identifies this zone in a pan-European market query. Verify it against the official EIC registry before relying on it: several countries publish aliased bidding-zone, control-area and market-balance-area domains, and the correct one depends on what is being asked for.

What an analyst watches here

GB is the exception on almost every axis: currency, settlement resolution, coupling and data source. It has no Nord Pool aggregated bid curve, and its fundamentals come from Elexon BMRS rather than ENTSO-E, so anything comparing GB against a Continental zone is comparing across two different collection paths.

Coverage

Day-ahead prices: Collected
Bid curves: Not published: no exchange publishes an aggregated curve for this zone
Continuous intraday: SIDC, 30-minute resolution
Interconnected neighbours: FR BE NL NO2 DK1

Neighbours are day-ahead coupling topology only: no capacity and no direction. They are what the reconstruction uses to derive a coupling reference price for modelled net imports, and they are not a substitute for allocated cross-zonal capacity, which is not yet ingested.

Enforcement decisions in this country

Published market abuse decisions by this country’s energy regulator, written up from the regulator’s own decision. A decision is listed by the authority that took it, not by the zone the conduct touched.

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