On 16 September 2026, the Scottish Parliament voted on a Green Party motion calling for a moratorium on hyperscale data centre applications. The moratorium itself was rejected by the SNP, Labour, and the Conservatives. But what passed instead has had the same practical effect for most applications — and in some respects a sharper one.
The same day, Planning Minister Hannah Mary Goodlad issued a planning direction requiring a full Environmental Impact Assessment for every data centre application over 50MW in Scotland, applying both to new applications and to those already in the system. A second requirement — that planning decisions on data centres above 50MW will not be taken until national planning guidance has been produced — came as part of the amended Holyrood motion. The Scottish Government has committed to producing that guidance by the end of 2026.
For developers with applications in the system, or with applications in preparation, the immediate question is practical: what does this mean for their programme, and what do they need to do now.
What has changed and when it took effect
The 50MW EIA direction
The Town and Country Planning (Environmental Impact Assessment) direction requiring an EIA for all data centre applications exceeding 50MW came into force on 17 September 2026 — the day after the Holyrood vote. The minister was explicit that it applies retroactively: ‘The guidance that I have issued today pertains to applications that are already in the system and any new ones that come in’. Applications already validated but without an EIA are not grandfathered. They need one.
This builds on an earlier direction issued on 17 August 2026, which required local planning authorities to notify Scottish Ministers within seven days of validating any data centre application exceeding 50MW. Together, the two directions give the Scottish Government visibility of and control over the full pipeline above the threshold, rather than relying on local authorities to assess each application independently.
The planning pause
Separate from the EIA direction, the amended Holyrood motion states that planning decisions on new hyperscale data centres above 50MW will not be taken until national planning and spatial guidance has been produced. The government has committed to producing that guidance by the end of 2026. The minister told councils not to expect to make imminent decisions before the new guidance is in place, making the guidance timeline the practical gating factor for the entire pipeline above 50MW.
The combination of the EIA requirement and the guidance pause means that, in practice, no application above 50MW in Scotland is likely to receive a determination for the remainder of 2026. That is a de facto pause — not a moratorium in name, but identical in effect for the duration of the guidance production process.
The scale of what is in the pipeline
Computer Weekly’s analysis of Barbour ABI data puts Scotland’s committed pipeline at 14 schemes totalling 2.4GW, up from four projects and 0.9GW in March 2026 — the fastest growth of any UK region in six months. The Scottish Greens and Action to Protect Rural Scotland count a larger number — 24 proposals with a combined capacity of up to 6GW — because they tally earlier stages of the application process.
The pipeline includes some of the largest single-site proposals in the UK. The Cato proposal from ILI Group at Auchtertool in Fife is a 600MW scheme — the single most contested application in Scotland. Scottish Ministers overturned Fife Council’s own ‘no EIA needed’ screening decision in August 2026, weeks before the Holyrood vote, meaning the Cato application was already subject to a mandatory EIA before the 16 September direction extended that requirement across all applications above 50MW. The 16 September direction changes nothing about Auchtertool’s status — it was already there.
Scotland’s data centre pipeline has grown faster than any comparable UK region primarily because of the available industrial land, the grid infrastructure legacy of heavy industry, and the government’s designation of the Lanarkshire AI Growth Zone. The DataVita campus at Chapelhall — 10 years of operational history, NWF-backed financing, CoreWeave as a 15-year anchor tenant — is the established reference point for what a well-structured Scottish data centre development looks like. The Cato proposal at 600MW has none of that track record and has attracted the most concentrated opposition.
What the EIA requirement means in practice
An Environmental Impact Assessment for a large data centre application is a significant undertaking. It requires specialist assessment of electricity demand and grid impact, water consumption, noise, air quality, transport, ecology and biodiversity, flood risk, landscape and visual impact, and — increasingly — community and social impact. For a 100MW or 200MW proposal, a comprehensive EIA typically requires 12 to 18 months of technical assessment work before the application is in a position to be validated.
The Buckinghamshire Foxglove case — in which the government conceded that granting permission without requiring a full EIA was a serious logical error — has established the standard that EIA mitigation commitments must be binding and enforceable, not aspirational. DataVita’s DV4 application at Chapelhall, submitted in September 2026, is an example of what a post-Foxglove standard submission looks like: closed-loop cooling, hospital heat recovery commitments, HVO generators under SEPA permit, and a full suite of technical assessments. Applications that make aspirational environmental statements without the technical evidence to support them are now legally vulnerable.
For applications already in the system without an EIA, the direction creates an immediate practical problem: the application cannot progress to determination without one, and producing one takes time. Developers with applications at validation stage without an EIA are effectively returning to the starting line for that phase of the process. Developers are advised to commission their EIA scoping requests immediately and to engage with DPEA and the relevant planning authority without delay.
The 50MW threshold and what it means for project design
The 50MW threshold is now the operative definition of hyperscale in Scottish planning. Two separate rules key off it — the notification direction of August and the EIA direction of September — and every argument made in the Holyrood chamber is reusable material for an objector anywhere in Scotland. A sub-50MW first phase changes the rules significantly, and some developers are likely to structure their applications accordingly.
A development that submits a first phase at 48MW avoids the mandatory EIA threshold and the planning pause. It does not avoid the scrutiny that comes with a large development in a contested location, and it does not avoid the need for a credible environmental case. But it changes the procedural route and the timeline. Whether that structuring approach will survive the national planning guidance — which may set a different threshold or apply EIA requirements more broadly — is an open question until the guidance is published.
The Scottish Greens have called for a 10MW threshold — five times more restrictive than the current 50MW definition. If the national guidance moves in that direction, the sub-50MW structuring approach becomes less useful. Developers whose programmes extend beyond a first phase need to design for the guidance they expect, not the rules that exist today.
The Lanarkshire AIGZ position
The Lanarkshire AI Growth Zone is not exempted from the new requirements. AIGZ designation improves planning policy weight and provides access to dedicated government engagement, but it does not create an exemption from the EIA direction or from the planning pause. DataVita’s DV4 application — already supported by a full EIA suite — is better positioned than any speculative application in the zone that has relied on the designation to carry the environmental case.
The national planning guidance, when produced, is likely to provide specific policy for AIGZ locations. A guidance framework that provides a clear route for well-structured applications in designated zones while maintaining environmental rigour would help the Lanarkshire pipeline to progress while filtering out the speculative applications that have produced the political pressure for a pause in the first place.
What developers with Scottish applications need to do now
Commission EIA scoping immediately if not already done. The EIA direction is in force. Applications above 50MW that do not have an EIA will not receive a determination. The scoping process establishes the scope of the assessment with the planning authority and is the first formal step in the EIA process.
Engage with the planning authority on programme. The guidance pause means decisions are unlikely before year end. But the work required to support the application — EIA production, technical assessments, community engagement — can continue. Applications that are fully EIA-supported when the guidance is published will be better placed to move quickly once the pause is lifted.
Assess the 50MW threshold implications for project phasing. A phased approach that keeps the first application below 50MW avoids the mandatory EIA for the initial phase and the planning pause. The risks of that approach depend on the specific site, the nature of the objections, and what the national guidance ultimately says about threshold levels.
Assess the national guidance timing. The government has committed to guidance by end of 2026. Given the political context and the volume of applications in the system, slippage into Q1 2027 is possible. Development programmes that depend on a 2026 guidance publication need a contingency plan.
Related reading
· Scotland data centre development: why the market is expanding beyond London
· UK AI Growth Zones: what has actually changed eight months on
· Data centre site selection in the UK: the new sequence in a power-first market
· Why most UK data centre pipelines fail before they complete
Sources referenced in this article
· MSPs reject datacentre moratorium but pause planning decisions — Computer Weekly
· MSPs back pause on hyperscale data centre decisions until new guidance is produced — Deadline News
· What did and didn’t happen about AI datacentres at Holyrood — Bella Caledonia
· Holyrood votes to pause expansion of data centres — Daily Business
· Scotland’s parliament backs de facto moratorium on hyperscale data centres — DCD
· DataVita submits £850m DV4 plans in Scotland’s first AI Growth Zone — Data Centre Review
· Where are we in the fight against hyperscale data centres? — Bella Caledonia
