If you're tracking data center capacity in Europe, you're likely watching the same question everyone is: will these projects actually come online on time?
Based on Vulcan's monitoring of over 15.5 GW of European data center projects and growing - including more than 90% of all planned UK capacity through 2027— we can now give you a clear answer. And for many projects, the answer is no.
The UK problem is structural, not just slow.
The UK market is fragmented. Average project size is only 22 MW, a fraction of typical US builds. But the more important finding: over 40% of UK projects expected online by end of 2027 have not yet broken ground. In the US, projects at this same stage consistently missed their stated startup dates. If UK timelines mirror US patterns — and the data suggests they will — a significant portion of planned capacity simply won't arrive when the market expects it.
The most visible example: a 40 MW expansion at Glasgow Airdrie Data Centre (DV1), owned by Data Vita Ltd, with a stated online date of May 2027. No land clearing has occurred. It's not impossible — but the probability of on-time delivery is shrinking fast.
One project is a bright spot.
The 80 MW expansion at Newport Data Centre (CWL1), owned by Vantage Data Centers, is on track and may even beat its August 2026 target. Land was cleared in 2023, first structures went up in 2024. This is what on-schedule looks like — and it's the exception, not the rule
What this means for you.
Whether you're making capacity decisions, evaluating counterparty risk, or tracking competitive build-outs, knowing which projects will slip — and by how much — is a significant edge. Vulcan gives you that visibility, with satellite-verified construction data and timeline modeling across thousands of projects globally.
To learn more about a Vulcan subscription, contact David Bellman at dbellman@synmax.com .
