Welcome to Connectus Utilities
Welcome to Connectus Utilities
The UK electricity grid is under increasing pressure. The connection queue has grown to an estimated 700–750GW of generation projects, far exceeding the country’s peak electricity demand. According to the National Energy System Operator, this reflects a sharp rise in applications across renewable energy, storage, and wider infrastructure, including new homes, solar farms, data centres, and EV charging hubs.
As a result, viable projects are frequently delayed for years, creating uncertainty for developers and investors. In some cases, these delays have led to projects incurring significant sunk costs and lost revenue.
In response, the UK is reforming how grid connections are managed. Approved in 2025, the reform moves away from a first-come-first-served model towards prioritising projects that are both “ready and needed.”
For developers, this represents a fundamental shift. Grid capacity and connection planning are no longer late-stage considerations; they are now critical to early project design and viability.
The changes do not stem from new primary legislation. Instead, they represent a regulatory overhaul of how projects enter and progress through the connection queue.
The reform was approved by Ofgem in April 2025 and is being implemented by the National Energy System Operator through the GB Connections Reform programme, commonly referred to as TMO4+.
Ofgem has been clear on the scale of change required, stating that the existing system was “not fit for purpose” given the volume of applications and the pace of energy system transformation. The new framework is intended to ensure that connections are granted in line with project readiness, deliverability, and system need.
Implementation began in June 2025, with the full transition continuing through 2026.
The previous first-come-first-served approach created significant inefficiencies.
A key issue was the emergence of “zombie projects” — schemes that secured grid capacity but failed to progress, sometimes remaining in the queue for years without being delivered. Meanwhile, more viable and strategically important developments were forced to wait behind them.
For developers and investors, these inefficiencies came at a substantial cost, with Ofgem themselves acknowledging “major projects [reporting] losses in the tens of millions; others [facing] costs inflated up to 200% and schemes cancelled due to bottlenecks in investment”
Even where projects do proceed, connection dates can extend well into the 2030s.
Under the new framework, projects are no longer prioritised purely by application date. Instead, they are assessed against criteria linked to deliverability and system value.
This includes planning progress, funding certainty, alignment with energy system needs, and the ability to deliver within a realistic timeframe. Projects that can demonstrate readiness and strategic importance will progress quicker.
As set out by Ofgem, the aim is to move towards a system that better reflects real-world delivery and priorities.
The reform also reflects wider structural changes in the UK energy system. Ofgem has described it as part of a “root-and-branch” review, recognising the scale of transformation required to meet future demand.
The Department for Energy Security and Net Zero has emphasised the need to accelerate clean energy deployment while supporting economic growth. This includes expanding renewable generation and responding to rising electricity demand. For businesses looking to explore opportunities in this area, ennovus.co.uk offers specialist advice.
Government policy increasingly recognises grid access as a critical enabler of infrastructure delivery. Reforms are expected to help unlock significant capital, with estimates suggesting around £40 billion of private investment per year could be supported (DESNZ).
Developers will face greater scrutiny of project readiness under the new system. Planning progress, funding certainty, and strategic clarity will carry more weight when securing and maintaining a position in the queue. Early-stage assumptions will need to be supported by credible evidence.
Grid capacity is now a central consideration in project development, influencing site selection, phasing, and overall design. In some cases, access to a viable connection may determine whether a project proceeds at all.
Developers should assess electricity demand, understand available network capacity, and identify potential reinforcement requirements from the outset. Early engagement with network operators is becoming essential.
Taking a proactive approach can help avoid costly redesigns, programme delays, and funding risks. In a more selective and competitive system, early preparation will be key to maintaining momentum and securing delivery.
By prioritising projects that are ready and needed, the new framework is designed to unlock capacity, accelerate delivery, and support the transition to a low-carbon energy system.
Grid capacity and utility planning must now be considered from the earliest stages of a project. Those who adapt to this approach will be better positioned to navigate the evolving connections landscape and deliver successful developments. If you need help with new connection projects, want to know how the reform might affect your projects or want to understand more about grid connection more generally, we can offer a short introductory call to discuss how we may be able to help. Simply contact us at https://connectus-utilities.co.uk/contact-us.
