Nscale has planning permission, Nvidia backing, Microsoft as anchor tenant and around 2 billion pounds committed to a data center at Loughton in Essex. What it does not have is 90 megawatts arriving in time for its 2027 opening. The company is reported to be in talks with a California fuel cell maker about generating its own electricity instead. For anyone building, financing or selling into UK infrastructure, the useful read is not that one project slipped. It is that grid connection has stopped being a permitting milestone and become a design input that shapes scope, sequence and capital structure from day one.
The Loughton project was supposed to be the showcase. Announced in September 2025 during Donald Trump’s state visit, billed as Britain’s largest AI supercomputer, with Microsoft signed up to use the capacity for Azure in the UK. Planning permission came through. A 90 megawatt supply was in the pipeline. The money was never the problem.
Then, as The Next Web reported in July, drawing on Sifted and Telegraph reporting, Nscale was told the connection would not be ready for the planned 2027 opening. The site had already slipped once, from a Q4 2026 target into 2027. This time the constraint was not planning or procurement. It was electrons.
Nscale is now understood to be exploring on-site generation, including reported discussions with Bloom Energy, a California maker of solid oxide fuel cells that produce electricity from natural gas. Bloom declined to comment. A spokesperson for Nscale said the company “remains fully committed to the Loughton project”. Two months on, there has been no public resolution.
If the best-capitalised AI builder in Britain, with a hyperscaler tenant and a chipmaker on the cap table, cannot get 90 megawatts on schedule, then queue position is not a risk sitting at the back of your development appraisal. It is the appraisal.
The delay is not a Nscale problem
Why one Essex site tells you what every other UK scheme is facing
It would be easy to file this as a single developer running into a single utility. The wider data says otherwise. Research from Sightline Climate, now trading as Currence, estimates that around a quarter of global data center capacity ran into delays during 2025, and that between 30 and 50 percent of the capacity expected online in 2026 could slip because of power constraints, equipment shortages or local opposition.
Britain has its own version of the squeeze. More than 100 UK projects are reported to be weighing gas generation while they sit in the queue. That is an awkward outcome for a government that has designated data centers as critical national infrastructure and built a growth story around them, while separately trying to decarbonise the grid. One forecaster now expects the UK to reach roughly 83 percent clean power by 2030 rather than the 95 percent target.
The political friction is building in both directions. New York became the first US state to freeze new data center approvals. Scotland’s governing party has pushed for a moratorium of its own. Local opposition in England is organising faster than the connection queue is clearing. So developers are caught between a grid that cannot deliver on schedule and communities increasingly unwilling to host the workaround.
We remain fully committed to the Loughton project.Nscale spokesperson, quoted in Property Week
What changes on the ground
Power stops being a utility question and becomes a construction scope
When a developer decides to bridge to the grid rather than wait for it, a large amount of new work appears in the programme. On-site generation, whether fuel cells, gas turbines or reciprocating engines. Switchgear and controls capable of orchestrating multiple sources in real time. Battery storage sized as core infrastructure rather than backup. Civils, foundations, acoustic mitigation, fuel supply, emissions permitting. None of that sits in a standard data hall package.
That is a live commercial opportunity for contractors with process plant or power generation experience, and a hard barrier for those without it. We covered the US version of this shift in detail when data center developers started building their own power plants, and again when the constraint spread across the wider market in power becoming the new lumber. Loughton is the UK arriving at the same junction, with less land, tighter emissions rules and a smaller specialist contractor base.
- Underwrite the connection date, not the connection offer. An allocated capacity figure with no deliverable energisation date is not a programme input. Ask for the date, in writing, before land goes unconditional.
- Price the bridge option at bid stage. If on-site generation is the fallback, it needs a cost, a lead time and a consented route through planning before it is needed, not after.
- Treat long-lead electrical gear as the critical path. Transformers and switchgear routinely outrun design and permitting. Order sequencing now drives the schedule more than trade sequencing does.
- Build phased energisation into the contract. Full nameplate capacity on day one is increasingly a fiction. Tranched handover protects both parties when the utility date moves.
Who this actually affects
The queue is not only a data center problem
Hyperscale campuses can absorb costs that would sink other schemes. A two billion pound project can wear a large transformer surcharge or fund its own generation. A mid-market industrial shed, a residential block or a logistics park cannot, and those projects are queuing behind the same substations for the same capacity.
The effect shows up in labour too. Electrical contractors with high voltage and commissioning experience are being absorbed by AI infrastructure work at rates the rest of the market struggles to match. UK practitioners are already reporting the pressure: in the BCIS outlook poll of more than 350 professionals, 62 percent expected labour costs to rise while only 20 percent expected availability to improve. Data centers did not create that gap, but they are widening it.
For ConTech founders, the demand signal is fairly legible. Interconnection tracking, load orchestration, electrical prefabrication, commissioning management and procurement visibility on long-lead power gear all sit directly on the constraint. Products that shave weeks off a schedule are interesting. Products that shave months off an energisation date are something else.
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| Power route | Typical timeline | Who builds it | Main risk |
|---|---|---|---|
| Wait for grid connection | Multi-year, date often unconfirmed | DNO and transmission owner | Tenant penalties if capacity is promised and missed |
| Fuel cells as a bridge to grid | Months, subject to fuel supply and consent | Specialist supplier plus civils and electrical contractor | Fuel cost, emissions scrutiny, unfamiliar consenting route |
| On-site gas generation | 24 to 36 months plus turbine lead time | Power generation contractors and process specialists | Turbine lead times, planning objections, carbon commitments |
| Battery storage alongside either | 12 to 18 months | Electrical contractors with integration capability | Interface coordination with the data hall and generation |
Nscale is building a data center at Loughton in Essex valued at around 2 billion pounds, with Nvidia backing and Microsoft as anchor tenant. The site has planning permission and a 90 megawatt supply in the pipeline, but the company was told the connection would not be available in time for its 2027 opening. It is now exploring on-site generation instead. The project had already moved once from a Q4 2026 target. (Source)
They can bridge a gap. Solid oxide fuel cells generate electricity from natural gas without conventional combustion, and can be deployed faster than a new grid connection or a turbine order. Nscale has reportedly held talks with Bloom Energy, which declined to comment. The trade-offs are fuel cost, emissions scrutiny and a consenting route most UK planning authorities have limited experience with. Treat it as a bridge, not a permanent supply. (Source)
Research from Sightline Climate, now Currence, estimates around 26 percent of data center capacity experienced delays during 2025, and that between 30 and 50 percent of capacity expected online in 2026 could be pushed back by power constraints, equipment shortages or local opposition. In the UK specifically, more than 100 projects are reported to be considering gas generation while they wait in the connection queue. (Source)
Yes, in two ways. Other developments queue behind the same substations for the same capacity, without the balance sheet to fund a workaround. And skilled electrical and commissioning labour is being pulled toward AI infrastructure work at premium rates. UK cost consultants polled by BCIS in March 2026 expected labour costs to rise while availability stayed flat or worsened, with boom sectors named as a contributing pressure. (Source)
Four practical moves. Get a written energisation date rather than an allocated capacity figure before land goes unconditional. Price and consent the on-site generation fallback at bid stage rather than in crisis. Order long-lead electrical equipment ahead of design completion, because lead times now exceed the permitting phase. And structure the contract around phased energisation so a moving utility date does not create an immediate liability. (Source)
No. The pattern is showing up across developed markets. New York became the first US state to freeze new data center approvals, and behind-the-meter generation has become standard practice on large American campuses. What is distinctive about the UK is the combination: a constrained grid, a government that has made data centers central to its growth plan, a legally binding clean power target, and a specialist contractor base that is thin relative to the pipeline. (Source)
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