Key Highlights

  • Scotland's operational data centres total only about 30MW across roughly 13 sites, but applications in the pipeline could demand up to 6GW of capacity.
  • The £5bn, 600MW Cato project in Fife has attracted more than 1,200 planning objections and an 8,000-signature petition; at full build-out it could use electricity equivalent to around 1.6 million households.
  • The Scottish Greens have proposed a moratorium on centres above 50MW, and the SNP's National Council backed a temporary pause in principle in June 2026, though First Minister John Swinney has not committed.
  • Industry warns a freeze could push billions in investment across the border to English AI Growth Zones, sharpening the trade-off between economic development and resource strain.

In Auchtertool, a Fife village of roughly 250 residents, a planning application has drawn more objections than the settlement has people several times over. By late July 2026, more than 1,200 formal objections had been lodged through Fife Council's portal against the proposed Cato data centre, with hundreds more expected before consultation closed. A separate petition against the scheme has gathered over 8,000 signatures. The mismatch between the size of the community and the scale of the opposition captures a tension now running through Scotland's economy.

Cato, put forward by developer ILI Group, is a £5 billion, 600-megawatt (MW) facility intended to serve the artificial-intelligence computing boom. It is one node in a wider network of proposals. ILI's so-called Stoics portfolio spans three Scottish sites totalling around 1.5 gigawatts (GW) and roughly £15 billion of proposed investment, including the 540MW Rufus project in East Ayrshire and the 400MW Aurelius scheme in North Lanarkshire. Campaigners at Action to Protect Rural Scotland have mapped 26 proposals across the country, while cautioning that no single official register exists.

Why the pipeline matters for Scotland's economy

The economic case advanced by developers is substantial on paper. ILI's own figures for Cato point to £708 million in gross value added across Scotland during construction, £105 million of it within Fife, and around 120 permanent skilled jobs once operational. Ministers have long courted this kind of inward investment: the Scottish Government's 2021 Green Data Centres Action Plan describes itself as supportive of the sector, and National Planning Framework 4 designates green data centres as "National Development 12", meaning the principle of such development cannot be challenged at the application stage.

That framing helps explain why the pipeline has grown so quickly. According to a June 2026 briefing from the Scottish Parliament's information centre (SPICE), Scotland has around 13 operational data centres today, amounting to only about 30MW of capacity. Yet the applications now in the system could, in aggregate, demand up to 6GW. The gap between the modest existing footprint and the vast proposed one is the heart of the debate.

The power and water arithmetic

Electricity is the first pressure point. SPICE notes that in its early phases Cato alone would draw around 400 gigawatt-hours (GWh) a year, equivalent to roughly 4.5% of Scotland's domestic electricity consumption. At full build-out the facility could consume close to 4 terawatt-hours annually, comparable to the electricity used by about 1.6 million typical households, or a large share of all Scottish household demand. Scotland generated 51.8TWh of electricity in 2024, some 91.5% of it from renewable sources, so campaigners question whether new clean generation would keep pace or whether data centres would simply absorb capacity intended to decarbonise homes and transport.

Water is the second. The BBC reported that Scotland's existing data centres already use enough tap water to fill about 27 million half-litre bottles a year, roughly 13.5 million litres, with consumption having quadrupled since 2021. For Cato specifically, the developer estimates around 34,000 cubic metres of water annually, equivalent to about 239 homes. Supporters argue that is trivial against national supply; opponents counter that localised abstraction and the cumulative effect of many facilities are what matter, particularly as parts of Scotland experienced water scarcity warnings in recent dry spells.

Risks, limitations and the opposing case

The backlash has now reached Holyrood. The Scottish Greens, led by co-leader Ross Greer, have proposed a moratorium on new data centres exceeding 50MW until a national strategy and clearer council guidance are in place. In June 2026 the SNP's National Council backed a temporary moratorium in principle, though First Minister John Swinney has received the proposal without committing to it. A parallel petition calling for a pause has attracted more than 2,500 signatures.

The strongest argument for caution is definitional. Planning policy privileges "green" data centres without robustly defining the term. The First Minister, speaking on 18 June 2026, described a green facility as one approved "with due account taken of the environmental implications", weighing renewable use, efficiency, water reduction and heat reuse. Critics say that is too elastic to constrain 600MW campuses, and that no standard environmental impact assessment is automatically triggered for such developments, leaving scrutiny to case-by-case judgement.

There are credible counter-arguments. Industry figures warn that a blanket freeze would be economically costly. Robert Eadie of consultancy Rimkus argued that a moratorium "would send a concerning signal to the market that Scotland is stepping back from supporting the infrastructure that underpins the modern economy", with capital likely to relocate elsewhere in the UK or Europe. That is not an idle threat: the UK Government is actively courting hyperscale investment through its AI Growth Zones, and North Lanarkshire has publicly welcomed plans to host advanced AI sites. A Scottish freeze could redirect billions across the border.

Cooling technology complicates the picture further. Newer designs increasingly favour closed-loop or air cooling, which can sharply cut water draw compared with older evaporative systems, and developers point to this when disputing worst-case water figures. Whether such commitments are enforceable through planning conditions, however, remains contested, and Scottish Water has stressed the need to plan carefully for cumulative demand rather than assess projects in isolation.

A balancing act with no easy answer

The confrontation in Fife is, at root, a question of sequencing. Scotland has abundant renewable electricity, cool weather suited to computing and a government keen on the digital economy, all genuine advantages. It also has a planning regime that pre-committed to the principle of these developments before the scale of AI demand, or the public reaction to it, became clear.

For households, the stakes are grid capacity, water resilience and local amenity. For investors, the risk is regulatory uncertainty after years of encouragement. For policymakers, the challenge is to define what "sustainable" actually requires, and to do so quickly enough to retain credibility without waving through 6GW of demand on trust. Whether Mr Swinney opts for a formal moratorium, tighter national guidance or business as usual, the decisions taken in the coming months will shape both Scotland's AI ambitions and the terms on which its communities are asked to host them.