GB in Context: International Comparison

Eight dimensions reveal where GB leads and where it trails. Every dimension has direct consequences for investment signals, consumer choice, and the pace of decarbonisation. The comparison is instructive not because any single jurisdiction gets everything right, but because the pattern of relative strengths and weaknesses reveals which reforms will yield the greatest return.

Settlement granularity

GB's 30-minute settlement period is the coarsest among all comparable peers. Australia's National Electricity Market moved to 5-minute settlement in October 2021, following a multi-year transition that began with the AEMC's rule determination in 2017. The EU adopted 15-minute settlement from June 2025 under the Electricity Balancing Guideline. US ISO/RTO markets have used 5-minute intervals for decades — PJM and ERCOT both settle on this basis.

Finer granularity matters because it enables more accurate price signals. A battery storage operator in Australia can capture value from a 3-minute price spike that would be averaged away in GB's 30-minute window. When MHHS completes its cutover in July 2027, GB will move to half-hourly settlement for all meter points, but this will still be 30-minute granularity — six times coarser than Australia. The question of whether to pursue 15-minute or even 5-minute settlement is already being raised in industry consultations, though no formal timeline exists.

Smart meter penetration

GB has installed approximately 40 million smart meters across 57 million meter points, giving it roughly 70 percent penetration. This is a respectable figure globally, but the picture is highly variable internationally. Italy and Sweden achieved near-universal smart meter coverage over a decade ago. Germany, despite being Europe's largest economy, sits below 30 percent because its legal framework required a different technical standard. The US has reached approximately 77 percent nationally, though coverage varies dramatically by utility territory. Australia's NEM averages around 56 percent, but Victoria reached 99 percent through a mandated rollout.

What matters is not just the number of smart meters installed but how effectively the data flows into market and operational systems. GB's DCC-operated communications infrastructure is unique: no other country has built a dedicated wide-area network specifically for smart metering. The US relies on utility-specific networks. Australia uses the public mobile network. The Nordic countries similarly use public infrastructure. GB's dedicated approach offers reliability advantages but also imposes higher costs per meter point.

Consumer data rights

Australia's Consumer Data Right (CDR) has been operational since 2020. It gives consumers a legal right to access and share their energy data with authorised third parties through standardised APIs. The CDR is not energy-specific — it began in banking and was extended to energy — which means the legal framework, accreditation regime, and technical standards were already mature when energy was added.

GB's equivalent is the Energy Smart Data Scheme under the Data (Use and Access) Act 2025. This legislation received Royal Assent but the implementing regulations are still being drafted. Industry estimates place GB approximately three to five years behind Australia in practical consumer data portability. The EU sits somewhere between: GDPR provides strong data access rights but does not mandate the standardised API infrastructure that makes CDR practically useful. The US Green Button programme is voluntary and adoption varies enormously by utility.

Centralised data hubs

This is the dimension where the gap between GB and the best international practice is most stark. The Nordic countries operate single national data hubs — Norway's Elhub, Denmark's DataHub, Finland's Datahub — that handle all metering data, supplier switching, and consumer access through a single platform. GB, by contrast, fragments these functions across DCC (meter communications), DTS (data transfer for switching), DIP (market messaging), and DSI (discovery and trust, not yet operational). A new market entrant in Norway needs one API integration. In GB, the same entrant needs five or more.

DER visibility, open data governance, and market access

Australia's National DER Register is already operational, giving AEMO visibility of installed solar, batteries, and other distributed energy resources. GB's Flexibility Market Asset Register does not launch until 2027. On open data governance, GB's “presumed open” principle under the Data Best Practice licence condition is arguably more legally enforceable than equivalents in most other jurisdictions. GB leads on CIM standardisation: since November 2025, all 14 DNOs publish network models in common CIM profiles, which is among the most advanced distribution-level CIM deployments globally.

Elhub is a single national platform operated by Statnett (Norway's TSO) that handles all electricity metering data for the entire country. When a smart meter records a reading, it flows through Elhub. When a consumer switches supplier, Elhub processes the switch. There is no fragmentation between collection systems, settlement systems, and market data systems because all functions run on a single platform.

The Danish equivalent, DataHub, performs a similar function for the Danish electricity market. Together, the Nordic model represents the most integrated approach to energy data management in the world. With 99 percent smart meter penetration in both Norway and Sweden, virtually all data flowing through these platforms is actual rather than estimated. This eliminates the estimation errors that plague markets with lower penetration rates.

One-hop vs five-hop architecture

The critical architectural difference between Elhub and GB's system is the number of hops between data origination and data use. In Norway, meter data takes one hop: from the meter (via the grid company) to Elhub. Any authorised party can then access it from the same platform. The path is: meter → Elhub → user.

In GB, the equivalent journey requires five or more hops. A meter reading travels from the meter through the DCC communications hub, to the data service provider, then to the supplier, then potentially to a data collector, then to the settlement agent, then to Elexon for settlement. If a third-party innovator wants to access that same data for a consumer-facing service, they need to navigate a separate consent framework, potentially involving the DCC's Other User access regime or the future Smart Data Scheme.

Each hop introduces latency, potential for error, and a point where data formats may need translation. Elhub's standardised APIs mean any market participant can integrate with a single interface. A new energy retailer entering the Norwegian market needs one API integration. In GB, the same entrant must integrate separately with DTS, DCC, and DIP at a minimum, plus individual supplier systems and metering agents. The barrier to entry is not regulatory — it is technical complexity.

The consolidation debate

Could GB replicate the Elhub model? The technical answer is yes: there is nothing architecturally preventing a single GB data hub. The practical answer is far more complex. GB's fragmented system evolved over 25 years of privatisation and incremental reform. Each platform — DCC, DTS, DIP — has its own contracts, stakeholders, funding mechanisms, and regulatory governance. The DSI represents the closest thing to a unifying layer, but it is explicitly designed as a discovery and trust service rather than a data hub.

Proponents of consolidation argue that the ongoing cost of maintaining multiple platforms, each with its own development roadmap and interface specifications, exceeds what a single platform would cost. Opponents argue that the transition risk of migrating live market systems to a single platform is unacceptable, and that the DSI-based federation approach achieves most of the same benefits without the migration risk.

The reality is that GB is already committed to the federated approach through the DSI programme. Whether this achieves Elhub-like simplicity for market participants remains an open question that will only be answerable once the DSI reaches full operation in the 2028 to 2030 timeframe.

Australia's Consumer Data Right is the most instructive international comparison for GB because it demonstrates what a fully operational consumer energy data scheme looks like. The CDR was introduced in banking first (the “Open Banking” phase) and extended to energy in 2020. It gives consumers a legal right not just to access their data but to direct it to authorised third parties — accredited data recipients — through standardised APIs.

The accreditation regime is critical. Any business wanting to receive consumer energy data under CDR must be accredited by the Australian Competition and Consumer Commission (ACCC). The accreditation process assesses information security, privacy practices, and ongoing compliance. This is not a light-touch regime: accreditation involves substantial technical and legal investment, but it creates genuine consumer trust because consumers know that any CDR-accredited recipient has been independently assessed.

GB's planned Smart Data Scheme under the Data (Use and Access) Act 2025 draws heavily on the CDR model. The Act provides the legal basis for requiring energy companies to share customer data with authorised third parties through standardised interfaces. However, the implementing regulations are still being developed, and industry estimates place the scheme becoming operational no earlier than 2027 or 2028 — a full seven to eight years after Australia's CDR launched for energy.

What the gap means in practice

The practical consequence of this gap is that Australian consumers already have access to a range of data-driven energy services that GB consumers do not. An Australian household can authorise a third-party app to access their detailed energy usage data, combine it with tariff information, and provide switching recommendations, personalised efficiency advice, or optimised EV charging schedules. These services exist because the data access infrastructure is in place.

In GB, comparable services either do not exist or rely on workarounds: screen scraping supplier portals, manual CSV downloads from the IHD manufacturer, or proprietary integrations with specific suppliers. None of these approaches scale. The Smart Data Scheme is designed to close this gap, but until it is operational, GB consumers face a data access deficit compared to their Australian counterparts.

The EU sits in an intermediate position. GDPR provides strong individual data access rights, and consumers can request their energy data from their supplier. However, GDPR does not mandate the standardised API infrastructure that makes the Australian CDR or the planned GB Smart Data Scheme practically useful at scale. The EU Data Act (entered into force in 2024) aims to address this, but energy-sector implementation is still being developed.

The US Green Button programme is the weakest comparator. It is voluntary, and adoption varies enormously by utility. Some utilities provide excellent Green Button implementations; many provide none. There is no federal equivalent to Ofgem that could mandate a universal standard, which means the US will remain fragmented on consumer data access for the foreseeable future.