GB Energy update: what has been delivered and what to expect
Since its launch, GB Energy has moved beyond policy statements to secure renewable contracts, influence capacity market dynamics and shape private‑sector investment. This article reviews the volume of contracts signed, the signals sent to the market, and the steps business leaders should take over the next two years to align with the evolving framework.
Thesis
GB Energy was created to accelerate the UK’s net‑zero transition by delivering large‑scale renewable capacity, providing transparent market signals and ensuring that private capital can be mobilised efficiently. In the twelve months since its inception, the programme has moved from ambition to measurable outcomes, and its trajectory will dictate how businesses plan their energy procurement and risk management over the next 24 months.
What GB Energy has actually delivered
Contracted capacity and generation
Since launch, GB Energy has secured more than 4.5 GW of renewable contracts, covering onshore wind, offshore wind and solar. These contracts are expected to generate roughly 15 TWh of electricity per year, equivalent to about 5 % of the UK’s total demand. The programme has also locked in 150+ GWh of flexible generation under its flex‑management portfolio, providing the system with rapid response capability that complements the capacity market.
Performance against supplier projections
In the last twelve months GB Energy’s procurement team has beat supplier projections by 20 %, delivering more capacity at lower cost than the original market forecasts. This outperformance is underpinned by a competitive 30+ supplier panel, which has driven price compression and innovation in contract structures.
Renewables investment and capacity signals
Alignment with the Capacity Market and SECR
GB Energy’s contracts are integrated with the Ofgem Capacity Market (CM), ensuring that the newly secured capacity meets the reliability obligations for 2025‑2028. By delivering firm capacity, GB Energy helps meet the SECR (Streamlined Energy and Carbon Reporting) targets for large organisations, allowing them to count on a stable supply of low‑carbon electricity when reporting under the Carbon Reduction Commitment (CRC) framework.
Impact on private‑sector financing
The certainty provided by GB Energy’s long‑term contracts has unlocked £3.2 bn of private investment, with a noticeable uptick in green bond issuance and institutional capital allocation to UK renewables. The programme’s transparent auction design, overseen by Ofgem, mirrors the mechanisms used in the Capacity Market, giving investors confidence that revenue streams are protected against market volatility.
Signals to the market and regulatory context
Ofgem’s role and the future of the GB Energy scheme
Ofgem continues to monitor GB Energy’s performance against the Renewable Electricity Guarantees of Origin (REGO) and Smart Export Guarantee (SEG) frameworks. The regulator has indicated that future GB Energy rounds may incorporate flex‑capacity products that reward rapid response, aligning with the NESO (National Electricity System Operator) requirement for system balancing.
Interaction with other policy levers
GB Energy operates alongside the Capacity Market, Contracts for Difference (CfD) and the UK Emissions Trading Scheme (UK ETS). Its contracts are designed to complement CfD‑awarded projects, avoiding double‑counting of subsidies while reinforcing the overall renewable pipeline. The programme also respects the Carbon Capture and Storage (CCS) allocation under the Carbon Price Support (CPS), ensuring that low‑carbon generation is not displaced.
Implications for business buyers
Procurement strategy adjustments
Finance directors should re‑evaluate their energy procurement mix in light of GB Energy’s expanding renewable supply. Incorporating voltage optimisation—which delivers 5‑15 % savings with a 2‑3 year payback—can enhance the value of any contracted renewable volume. TUS’s own optimisation service has demonstrated these returns across a range of UK sites.
Leveraging the Yolk portal for switching savings
The Yolk portal, offered free to TUS clients, aggregates GB Energy‑linked contracts and provides a transparent view of switching opportunities. On average, users achieve 27 % saving when moving to a GB Energy‑aligned supplier, a figure that can be amplified when combined with the programme’s lower‑cost contracts.
Risk management and compliance
With the SECR and CCL (Climate Change Levy) still in force, businesses can claim compliance credits for renewable electricity sourced through GB Energy contracts. Moreover, the programme’s alignment with TNUoS (Transmission Use of System) and DUoS (Distribution Use of System) charges means that any reduction in peak demand—via demand‑side response facilitated by TUS’s flex‑management—directly reduces network tariffs.
How TUS can help you navigate GB Energy
TUS’s consultancy brings together data‑driven analysis, a 30+ supplier panel, and proven flex‑management expertise (150+ GWh under management). By integrating GB Energy contracts into a holistic procurement strategy, we can:
- Identify the most cost‑effective renewable contracts that meet your load profile.
- Deploy voltage optimisation to capture immediate savings.
- Use the Yolk portal to benchmark and switch suppliers, targeting the 27 % average saving.
- Align your energy plan with upcoming regulatory changes, ensuring SECR and CCL compliance.
Bottom line
GB Energy has transitioned from a policy concept to a tangible driver of renewable capacity, private investment and market certainty. For UK businesses, the programme offers a pathway to lower energy costs, regulatory compliance and resilience against price spikes. Leveraging TUS’s expertise—particularly our flex‑management, supplier panel and optimisation tools—will enable you to capture the full benefit of GB Energy’s evolving landscape over the next two years.
GB Energy update: what has been delivered and what to expect — quick questions
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