Construction AI: the data centre pipeline gets gated by power and Whitehall, not planning

Here's the number that reframes the whole data centre story. On 29 July, Ofgem proposed that developers pay a refundable deposit to reserve a grid connection, pitched at between £237,500 and £712,500 per megawatt. For a 1GW hyperscale campus, that's hundreds of millions of pounds posted before a single foundation is poured, handed back only when the project actually gets built (Ofgem, reported by Energy Live News and BusinessGreen, 29 July). The consultation runs until 16 September.

The reason is a queue that has stopped meaning anything. Connection requests have gone from 41GW to 125GW in the space of a year. To put that in proportion, Britain's peak electricity demand in 2025 was about 46GW, so the queue is now close to three times the entire country's peak. A lot of that is developers parking a connection they may never use, which is exactly what blocks the schemes that are shovel-ready. The deposit is a filter. Put money down or step aside.

What that means on site is that the grid queue, not the planning system, is now the gate on the data centre pipeline. We spent the back half of July talking about planning reform speeding things up, the pre-application consultation being scrapped for major infrastructure from 24 July. But a consent you can't power is a drawing, not a building. The comparison only goes so far, but it's a bit like being handed the keys to a unit with no meter fitted. For the contractors and enabling-works firms circling the big sheds, John F Hunt's £20m remediation package at CyrusOne's LON6 site near Iver Heath on 17 July being the kind of job in play, this decides which projects reach mobilisation and which sit in the queue burning money. That's what it's about.

The procurement filter: if you're pricing data centre work, ask the client where their connection sits in the queue and whether they'll post the deposit. The answer tells you if the job is real.

There's a second gate, and it's a self-inflicted one. When the government abolished DSIT on 21 July, the department that had run the AI Growth Zones went with it. A week on, and as of 29 July nobody has decided which department now owns the programme. Its functions were split between the new Department for Business, Innovation, Science and Trade and the Department for Culture, Media and Sport, but the Growth Zones themselves are sitting in the gap. Officials told DataCenterDynamics the government "remains committed" and confirmation will come "in due course" (DCD, 29 July).

So the two flagship data centre policies are now pulling in opposite directions. Ofgem is tightening the grid to make sure only serious projects get through, which is sensible. Meanwhile the vehicle meant to attract those serious projects, the Growth Zones at Culham and the sites in North Wales, the North East and North Lanarkshire, is running without a driver. I'm not saying the whole thing stalls, the money and the sites don't vanish because a nameplate changed. But if you're a contractor building your programme around a Growth Zone timetable, an unowned programme is a scheduling risk you're carrying whether you priced it or not.

The people this lands on aren't in Whitehall. It's the commercial team at a regional contractor who've built a resourcing plan around a zone going live, and now can't get a straight answer on when. Carry the uncertainty in your float, not your optimism.

For your board pack: flag any pipeline work that depends on an AI Growth Zone as timetable-at-risk until a department is named. It's a one-line caveat that saves an awkward conversation later.

Put the two together and the lesson for the week is simple. The gates on the UK's biggest construction pipeline right now are power and machinery-of-government, not planning consent and not model capability. All the noise this month has been about cleverer agents and faster approvals. What actually decides whether a data centre job reaches your site is whether it has a grid connection its backer will pay to hold, and whether the policy vehicle behind it has someone answering the phone.

For a smaller firm nowhere near the hyperscale sheds, this still matters, because the same grid squeeze pushes up connection times and costs for the housing and commercial schemes competing for the same capacity. What you can do is unglamorous. Keep your project data clean enough that when a client asks where a scheme sits, or an enabling-works package firms up at short notice, you can move fast. The admin discipline that lets you say yes quickly is worth more than any forecast about where the market's heading.

A practical step: if data centre or Growth Zone work is on your radar, put the 16 September Ofgem consultation deadline in the diary and read the connection question into your next go/no-go. Better to know the connection's real than to mobilise against a queue position.