The architect of the London Eye wants to build a vast tidal power station in a 14-mile arc off the coast of Somerset that could help Britain meet surging electricity demand to power artificial intelligence – and create a new race track to let cyclists skim over the Bristol Channel.

Julia Barfield, who designed the Eye and the i360 observation tower in Brighton, is part of a team that has drawn up the £11bn proposal. It would curve from Minehead to Watchet and use 125 underwater turbines to harness the power of the second-highest tidal range in the world.

The proposal comes amid growing concern that rapidly rising use of AI in Britain will drive up carbon emissions unless more renewable energy sources are found. The AI boom is expected to add to sharp increases in demand for electricity across the UK, which the government estimated this month could more than double by 2050.

“If the decision is to go ahead with adopting more and more AI – which I am surprised is not being questioned more at a time of climate emergency – then it is going to be better with a renewable energy source,” said Barfield. “Datacentres could double energy demand and this is a predictable and reliable source.”

The barrage would not cross the full breadth of the channel but would instead curve to and from the Somerset coast with a 2.5GW maximum output – not far short of the peak energy that will be created by the Hinkley Point C nuclear power station just 12 miles east. It would be enough to power 2m homes.

A visualisation of the full arc of the proposed lagoon. Illustration: Marks Barfield Architects

The vision includes a path along the top of the semi-circular barrage for walkers and cyclists willing to brave the south-westerlies, a water-sports marina, a lido and an observation tower. Local MP Rachel Gilmour, who is backing the plan, said the pathway “will become absolutely iconic”.

The designers have tentatively suggested it also might be possible to install datacentres within the structure, allowing them to benefit from cheap seawater cooling. There are hopes for oyster and mussel beds, arrays of floating solar panels and a coastal amphitheatre to boost the economy of Minehead, once a popular holiday resort and now one of the 20% most deprived areas in Britain.

The latest UK energy policy states that tidal and wave energy could play a role “if their costs can be reduced”.

“We have got people who want to fund it but they will only do so if the government is supportive,” said Aidan Clegg, chief executive of the consortium. “They need to take this seriously. This is not hypothetical – we have a strong plan in place.”

A visualisation of the cycle track over the tidal power station. Illustration: Marks Barfield Architects

A spokesperson for the Department for Energy Security and Net Zero said: “We are open to considering well-developed proposals for harnessing the tidal range energy in the bays and estuaries around our coastlines, which…


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Last Update: December 27, 2025