Sir Keir Starmer has been issued with a fresh warning that Britain doesn't have enough power for the new data centres needed to fulfil Labour's AI ambitions.As part of Donald Trump's state visit this week, the Prime Minister has welcomed a string of American tech bosses to Britain.He is also set to sign a technology prosperity deal with the US President, which is touted as offering major investment by US firms to help Britain develop AI capabilities.But the influx of US investment announced as part of Mr Trump's visit - estimated to total around £150billion - has raised fresh questions about the UK's infrastructure.It has also cast fresh scrutiny over Labour's Net Zero goals, with AI systems requiring huge amounts of electricity to power vast data centres.Jensen Huang, boss of chip giant Nvidia, this week said the massive energy needed for new AI infrastructure in the UK will likely require fossil fuels such as gas-fired power stations.And one expert set out how just one data centre would need the equivalent of 4.5 gigawatts (GW) of power - as much electricity as used by three million homes.Professor Gina Neff, AI professor at Queen Mary University London, also warned the UK doesn't have enough water for cooling new data centres. Keir Starmer is signing a technology prosperity deal with Donald Trump, which is touted as offering major investment by US firms to help Britain develop AI capabilities One AI expert set out how just one data centre would need the equivalent of 4.5 gigawatts (GW) of power - as much electricity as used by three million homes'These are really very power-hungry facilities,' Prof. Neff told BBC Radio 4's Today programme.'Let me give you a little bit of context. The plan that OpenAI announced, the Stargate, is part of a large set of investments that OpenAI is going forward with with Oracle and Softbank.'The first one of those data centres they announced is targeted for Texas. It's targeted for 4.5GW of power.'Currently the total amount of power in the UK for IT is 1.6GW. So you're starting to see the scale of what some of these facilities can be - they're massive.'What's a GW of power? That's enough power for 750,000 homes.'Prof. Neff highlighted how there were new housing developments still waiting for approval in Britain because of a lack of energy supply on the national grid.'The maths needs to be right before these facilities can get built,' she added. 'We don't have enough power and we don't have enough water.'As well as a commitment to reach Net Zero by 2050, Labour also wants to decarbonise the UK's electricity grid by 2030.The Government has also pledged a permanent ban on fracking to extract natural gas, in line with Labour's general election manifesto.And Energy Secretary Ed Miliband has also vowed not to appove new oil and gas licenses in the North Sea as he spearheads Labour's efforts to transition to green energy.This puts the Government in apparent conflict with Mr Huang's suggestion that new gas-fired power stations will be needed to help turn Britain into an 'AI superpower'.'There is going to be a lot of motivation and incentives to want to bring more power to bear,' the Nvidia boss said ahead of attending Wednesday night's dinner at Windsor Castle as part of Mr Trump's state visit.'Sustainable power like nuclear, wind, and solar – but I am also hoping that gas turbines are going to also contribute.'Treasury minister James Murray this morning insisted Britain would not ramp up gas production in order to help meet the energy needs of AI data centres.'It's not part of our plan… our plan is to move away from fossil fuels,' he told BBC Radio 4.'Our plan is to move towards renewable and independent sustainable sources of energy.'Challenged that there is not enough electricity, Mr Murray said: 'That issue with there not being enough energy is why we are running at this transition to clean energy as quickly as we possibly can.'Tory leader Kemi Badenoch said: 'Keir Starmer is hoping promises of future tech deals will distract from his government in crisis.'But beneath the flashy numbers there is a more fundamental problem: to be a tech and AI superpower, Britain requires cheap, abundant energy.'Instead, Labour continue to push up energy bills in pursuit of Net Zero.'Only the Conservatives are serious about exploiting our resources in the North Sea to bring down bills for families and the businesses that generate economic growth.'Sir Nick Clegg, the former deputy prime minister who went on to work for tech giant Meta, has also issued a warning about Britain's ability to build huge data centres.'Of course it's great there's investment in the UK,' he said. 'But these really are crumbs from the Silicon Valley table.'If you consider that total compute capacity in the UK is estimated to be around 1.8GW with, I believe, ambitions to reach 6GW by 2030 - that is about the same as one single data centre being built by my former employer, Meta, in Louisiana.'So I think some sort of perspective needs to be applied to all the hype that comes from the Government and the tech companies at times like this.'Especially when we are never going to compete with the Chinese and America on infrastructure.'Sir Nick added: 'Where we can compete is how you deploy AI in the workplace innovatively through new applications and so on.'