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The Proposed Pay Scheme The chief executive of Arm is in line for a pay package that would make him a billionaire if he hits targets to turn the British microchip giant into the UK's first trillion-dollar company. Arm, which is listed in New York but retains its global headquarters in Cambridge, has proposed a pay scheme for Rene Haas in which he will receive generous annual share awards plus a maximum bonus of $800m if he can hit certain 'exceptional growth metrics'. The Targets In the proposed bonus, or 'value creation plan' for Haas, 63, he will be awarded 425,000 shares if he can hit targets. The first target is a trillion-dollar valuation by 2029, reaching $1.25trn the following year and £2trn by the end of March 2031. The Financial Impact The payout would be one of the biggest ever awarded by a British company. Assuming the policy is approved and the targets are hit, Haas is in line to make well over $1bn in total by 2031. Maximum bonus: $800m Annual award of shares: up to 200% of salary Targets: $1 trillion valuation by 2029, $1.25trn by 2030, and £2trn by 2031 The Industry Impact The eye-watering market capitalisation-based pay schemes increasingly being offered by US companies dwarf the level of rewards at UK businesses. This deal highlights the competitive nature of executive remuneration in the global technology industry. The Future Outlook Haas, who is pushing Arm from its core strategy of providing architecture for microchips in smartphones into developing chips for AI datacentres, has predicted that this change of tack could increase Arm's revenues fivefold.

The Misstated Emissions Developers working for Google have significantly misstated how much carbon two proposed AI datacentres will contribute to the UK’s total emissions in planning documents reviewed by the Guardian. The tech company wants to build two huge datacentres – one 52-hectare (130 acre) project in Thurrock and another at an airfield in North Weald, both in Essex. To do so, developers are required to submit planning documents calculating how much carbon these projects will emit as a proportion of the UK’s total carbon footprint. The Calculation Error In both cases, they appear to have compared one year of the proposed datacentre’s emissions with the UK’s entire five-year carbon budget, understating the significance of their emissions by a factor of five, according to experts at the tech justice nonprofit Foxglove. Google's Thurrock datacentre claimed its emissions would amount to 0.033% of the UK’s budgeted carbon footprint between 2028 and 2032, but it will actually be 0.165% of the total. The North Weald datacentre said it would emit 0.043% of the UK’s total carbon budget from 2033 to 2037, but it will actually emit 0.215% of the total. The Impact Analysis These apparent misstatements are another example of a pile-up of faulty calculations surrounding AI development and its environmental footprint in the UK. The three developments will account for more than 1% of the UK’s carbon budget in 2033, equivalent to the emissions of a mid-sized city such as Bristol. The Prediction “Google has serious questions to answer about its dubious datacentre pollution figures,” said Tim Squirrell, the head of strategy for Foxglove. “Unless they can explain themselves, it looks like they are seriously misleading the council and the public over the climate pollution their facility will cause.”

The Government's Energy Calculations ClashThe UK government is facing internal divisions over the energy demands of AI datacentres, with two key departments offering vastly different projections. While the Department of Science, Innovation and Technology (DSIT) forecasts that AI datacentres will consume 6GW of electricity by 2030, the Department of Energy Security and Net Zero (DESNZ) projects usage of less than a tenth of that amount. This discrepancy raises questions about how the UK can simultaneously pursue its ambition to become an AI superpower while meeting decarbonization targets.Conflicting Projections from Key DepartmentsThe DSIT's "UK compute roadmap," published in 2025, sets out a "bold, long-term plan to transform our national compute ecosystem" by building AI datacentres. The document explicitly states: "We forecast that the UK will need at least 6GW of AI-capable datacentre capacity by 2030." This ambitious plan involves creating multiple AI growth zones across the country, each requiring at least 500MW of electricity.In contrast, DESNZ, which is responsible for the UK's carbon budget and climate targets, has incorporated AI datacentres into broader forecasts for the energy use of Britain's "commercial services" sector. These projections suggest the entire sector's energy use will grow by just 528MW between 2025 and 2030 – equivalent to adding the consumption of 1.7m homes by the end of the decade.The DESNZ has stated it does not hold separate projections for datacentre growth, despite the government's commitment to building significant AI infrastructure.The Scale of the DiscrepancyThe difference between the departments' projections is staggering. DSIT's estimate of 6GW for AI datacentres alone is more than ten times higher than DESNZ's projection for the entire commercial services sector's growth. This means that if DSIT's projections are accurate, the energy demands of AI datacentres would far outpace the government's current plans for grid expansion and decarbonization.Each proposed AI growth zone would require at least 500MW of electricity – an amount only slightly less than DESNZ's forecast for the increase in energy usage of the entire commercial services sector. This suggests that even a handful of these zones would strain the government's energy planning.Revised Emissions Figures and ControversyThe controversy surrounding these projections deepened when DSIT revised its figures for the carbon emissions of AI datacentres. Originally, DSIT's projections for the carbon emissions of additional AI computing capacity were between 0.025m and 0.142m tonnes of carbon equivalent (MtCO₂) – below 0.05% of Britain's projected emissions.After questions were raised about the plausibility of these figures, the document containing them was removed from the government website. Then, after inquiries from The Guardian, DSIT updated its numbers significantly. In a statement posted online, the department acknowledged: "The UK's cumulative 10-year greenhouse gas emissions from AI compute could range from 34 to 123 MtCO₂ – this is around 0.9-3.4% of the UK's projected total emissions over the 10-year period."This represents more than a hundredfold increase in the estimated emissions, raising serious questions about the initial calculations and the transparency of the government's planning process.Critics Question Government Competence and Corporate InfluenceThe conflicting projections have drawn sharp criticism from experts and observers. Tim Squirrell, the head of strategy for the NGO Foxglove, commented: "The government's cluelessness over the environmental impact of datacentres would be laughable, if it weren't so alarming."Cecilia Rikap, a researcher at University College London, offered two possible interpretations of the "misalignment": either DESNZ and DSIT are incompetent, or there's some kind of "magical thinking about AI and big tech." She added: "Either way, the episode uncovers how these corporations control not only the AI value chain, but also the UK government."Foxglove filed an environmental impact assessment request with DESNZ in January, asking how the department had incorporated AI datacentres into its projections for Britain's emissions. The response, which referred to broader forecasts for the commercial services sector, did not address the specific concerns raised.Future of UK AI Strategy and Climate GoalsThe UK government appears to be attempting to balance competing priorities: becoming a leader in artificial intelligence while meeting international climate commitments. Carbon budget 7, which will outline the UK's climate plans for the coming years, is set to be released this summer and may provide more clarity on how these objectives will be reconciled.A spokesperson for DESNZ noted that "datacentre emissions are factored into our modeling, including for carbon budget 7," and mentioned that "The AI Energy Council is exploring opportunities to attract investment and support the development of clean power for datacentres."However, the significant discrepancy between government departments suggests that the UK's strategy for becoming an AI superpower may be developed without adequate consideration of its environmental implications. As the government moves forward with its AI ambitions, the tension between technological advancement and climate responsibility will likely remain a central challenge.

The Government's Massive Emissions RevisionThe UK government has dramatically revised upward its estimates of carbon emissions from AI datacentres, now projecting up to 123 million tonnes of CO₂ over the next decade—more than 100 times previous figures. This revelation raises serious questions about the government's climate commitments and its push for AI-driven economic growth.The Scale of AI's Environmental FootprintAccording to new data quietly published this week, energy use by AI datacentres in the UK could cause the emission of up to 123m tonnes of carbon dioxide (CO₂) – about as much as generated by 2.7 million people – over the next 10 years. That latest figure replaces a previous estimate – since deleted – that claimed emissions would reach a maximum of 0.142m tonnes of CO₂ in a single year.The latest estimates were revealed in a revision to the UK "compute roadmap", which sets out the government's plan "to build a world-class compute ecosystem" for delivering artificial intelligence in the UK – a goal on which the government has staked its hopes for economic growth.The Carbon Impact NumbersAccording to the Department for Science, Innovation and Technology's (DSIT) latest estimates, the carbon impact of the planned AI buildout could range from 34m to 123m tonnes of CO₂ – about 0.9% to 3.4% of the UK's projected total emissions between 2025 and 2035. The lower range of the estimate would depend on greater efficiency in AI models and hardware, and faster decarbonisation of the UK's energy grid.AI datacentres require huge amounts of electricity to operate – much more than the datacentres used to store online data – and most of that continues to be generated by fossil fuels.Climate Concerns and Government ResponseThere is increasing alarm at the carbon impact of AI and with calls to reduce global emissions to mitigate the climate emergency becoming increasingly urgent. Patrick Galey, the head of investigations for the Global Witness climate campaign, said: "We have a handful of years until our carbon budget is exhausted. To waste what little bandwidth we have left – when 750 million people worldwide lack access to electricity – assisting some of the richest men ever to hone their plagiarism bots would be a historic idiocy that future generations are unlikely to forgive today's leaders for."Foxglove's head of strategy, Tim Squirrell, added: "The government has a legally binding commitment to reach net zero by 2050. This already sat awkwardly alongside its hell-for-leather embrace of a hyperscale AI datacentre buildout, which unchecked could double the electricity consumption of the entire country. The situation has now been revealed to be much, much worse, given the fact the government doesn't seem to have done even the most basic arithmetic needed to measure the potential new carbon emissions of these datacentres."Officials from the DSIT appear to have made the revision after an investigation by Foxglove, an independent watchdog, and the Carbon Brief news site said they appeared to be a significant underestimate. The government declined to comment on the record.Future of AI and Climate PolicyThe dramatic revision of emissions estimates comes as the UK government continues to push for AI adoption, with recent announcements including a £500m fund investment. This creates a significant tension between the government's economic ambitions for AI and its climate commitments, particularly as the UK aims to reach net zero emissions by 2050.As the true environmental cost of AI becomes clearer, policymakers will face increasing pressure to balance technological advancement with sustainability concerns. The path forward may require more efficient AI models, accelerated renewable energy adoption, or potentially scaling back some aspects of the planned AI buildout to meet climate targets.

Revolut, the UK banking app, has reported a 57% increase in profits for 2025, but warned that its support for energy-intensive sectors such as crypto and AI could lead to a reputational risk. The fintech company, which can now launch as a fully fledged UK bank after a five-year wait for regulatory approval, offers crypto trading and has applied for a banking licence in the US.The company's annual report highlighted that cryptocurrency mining and AI datacentres demand large amounts of power, with competition for electricity supplies getting steeper since the US-Israel war on Iran sent energy prices soaring over the past month. Revolut's chief executive, Nik Storonsky, hailed another “landmark year” for the company, which has 68.3 million individual customers and 767,000 business customers.Revolut's growth has been rapid, with revenues climbing 46% to £4.5bn and a £1.7bn pre-tax profit for 2025. The company plans to offer a wider array of banking services in the future, such as lending and other products, and has launched mortgage refinancing in Lithuania. Despite the potential risks, Revolut believes its digital-first approach and emphasis on financial inclusion could lead to it being “relatively insulated and even benefit from an orderly energy transition, relative to traditional financial institutions”.