More than 700 clean energy projects in Great Britain have been offered a grid connection date since the start of the year, the National Energy System Operator (Neso) has confirmed, marking a significant breakthrough after years of delays that threatened to derail the government’s clean power ambitions.
The projects – which include wind and solar farms, battery storage, gas and hydro schemes – represent almost 60% of the 1,200 clean energy schemes that need to begin generating electricity by the end of the decade for the UK to achieve a virtually carbon-free grid by 2030. Together they amount to 37 gigawatts of new capacity, roughly a third of the 100GW that the system operator says is needed to meet the target.
The Labour party, which came to power nearly two years ago, pledged to double onshore wind, triple solar power and quadruple offshore wind capacity by 2030 – an ambition backed by Neso’s own advice, published in November 2024, which deemed the target achievable without increasing costs and argued it would insulate the UK from volatile gas prices. The wider Clean Power 2030 Action Plan is expected to unlock around £40 billion in annual investment and create more than 400,000 jobs in clean energy industries, according to the government.
How ‘zombie projects’ clogged the queue
For years the biggest obstacle to that ambition was a grid connection system so badly overloaded that shovel-ready projects faced delays of 10 to 15 years. The root cause was a surge of speculative applications – so-called “zombie projects” – that exploited the old “first come, first served” queueing system. Developers would lodge applications without planning permission, land rights or any realistic prospect of delivery, simply to secure a place in the queue. By the time Neso began its clean-up, the connections queue had ballooned to more than 738 GW – far exceeding the estimated 200-225 GW of clean generation capacity that Britain actually needs by 2030, and more than twice the capacity required to meet the net zero target by 2050.
These zombie projects effectively blocked genuine schemes from connecting, creating a logjam that threatened to push renewable developments into the 2030s. In late 2023 Neso, working with the government and the energy regulator Ofgem, began a two-year process to clear the backlog. The reforms, approved by Ofgem in April 2025, fundamentally rewrote the rules. The old system was scrapped and replaced with a “first ready and needed, first connected” approach. Projects must now demonstrate strict readiness before they can apply for a grid connection: they need planning permission, secured land rights, and must be aligned with the government’s clean energy targets. Only those highly likely to be delivered in the coming years are offered a date.
As part of the clean-up, Neso pulled the plug on hundreds of speculative projects that had been sitting in the queue. Since the start of 2026, it has offered connection dates to more than 700 “shovel-ready” schemes. The system operator has also published a new delivery pipeline unlocking 381.5 GW of capacity that is ready to build.
Michael Shanks, the energy minister appointed in September 2025, described the milestone as a “landmark step” in turning connections reform into action. “Upgrading the grid and making it easier for clean power projects to connect to it will help protect bill payers from fossil fuel price spikes,” he said. “These offers will help to bring down bills for good with clean energy that we control.”
Kayte O’Neill, Neso’s chief operating officer, said the reforms were “delivering real results”. “These offers give developers the certainty they need to invest, supporting economic growth,” she added. “They also help deliver the reliable, clean and affordable energy system Britain needs. With over half of offers made, we are focused on the next phase of delivery.”
Beyond the queue: the next bottlenecks
While the administrative reforms have cleared the speculative backlog, attention is now turning to the physical limitations of the grid itself. National Grid Electricity Transmission is reportedly overwhelmed by the scale of the build-out required, and there are growing concerns that the capacity to physically construct new transmission lines, substations and upgrades may become the next major bottleneck, potentially causing further delays.
A separate challenge is the rapid rise of data centres, driven by the growth of artificial intelligence, which has intensified competition for grid access. The government is consulting on new powers to clamp down on speculative applications from data centres and prioritise those that are strategically important.
Grid capacity also varies sharply between regions. Remote areas, where many large renewable projects are sited, often struggle to accommodate the power they generate. To manage the intermittent nature of wind and solar, the UK will need an estimated 23-27 GW of battery storage by 2030 if it is to meet the 95% clean power target. Emerging technologies such as high-temperature superconducting cables are being explored as potential solutions to ease transmission bottlenecks and reduce energy loss.
The government’s broader policy framework – including the legally binding net zero by 2050 target, the energy security strategy, and Labour’s publicly owned energy company Great British Energy – continues to underpin the push for domestic, low-carbon generation. But as Neso’s O’Neill noted, the focus is now firmly on the next phase: turning the connection offers into physical generation, and ensuring that the grid itself can keep pace with the unprecedented build-out that 2030 demands.
