Britain’s first genuine argument about the AI buildout is not happening between the government and the industry. It is happening between the government and the Green party, and this week it reached the airwaves. Writing in the Guardian on Friday, Zack Polanski said it was time to “slam the brakes on these energy-guzzling, water-guzzling datacentres”, in an interview the same day in which he accused Labour of prioritising “AI tech billionaires” over water-stressed communities, most of the country currently being in drought.
Labour’s answer was a flat no. The government rejects a moratorium on the grounds that halting AI infrastructure would be a disaster for the economy, and it has a defensive line on the facts of consumption: the 2024 decision to designate data centres as critical national infrastructure, ministers point out, does not give them priority access to water or electricity, does not put them ahead of households during shortages, and in England data centres account for less than 1% of non-household water consumption.
Both sides have a point, which is why the row is worth taking seriously rather than filing under pre-election noise. Polanski’s strongest ground is not the water percentage, which is currently small; it is the trajectory. The Guardian’s environment desk has separately reported water companies warning that Labour’s 2024 growth forecasts for the sector failed to account for datacentre water consumption at all, and Friends of the Earth is calling for a moratorium until proper assessments exist. A 1% figure describes today. It says nothing about a buildout that the government wants to speed through planning precisely because it thinks the UK is behind.
The government’s strongest ground is the alternative. Data centre capacity, grid connections and compute are being built somewhere, and the question Westminster faces is whether the tax base, the jobs and the strategic capability land in Britain or in the Gulf, Virginia or northern France. Every serious AI company needs the power, and the ones that build here at least fall under British water regulation and planning law.
For businesses the practical stake is siting. Growth zones and flexible grid contracts favour the regions with spare generation; opposition campaigns favour nowhere. The pattern already visible in Brick Lane and Scottish villages is that every constituency welcomes the investment until the cooling towers appear over the hedge, and developers who assume the critical-infrastructure label short-circuits local consent are discovering it does not. The government has made speed a national priority. The planning system, water stress and now a political challenger have all made clear that speed has a price, and it is being quoted daily.
Expect this argument, not the technology, to define the AI story in Britain over the next year. The compute will get built somewhere. Whether it gets built here now depends on who wins the local fights.