National Grid to site biggest substation in UK near planned Teesside datacentre

National Grid has agreed to purchase 29.5 hectares, or 73 acres, at Dorman Point on Teesside. The land is owned by Teesworks, a local private-public partnership. National Grid plans to use it for what could become Britain’s biggest electricity substation.

The substation would be next to a proposed artificial intelligence datacentre. Planning applications describe a project covering nearly 500,000 square metres. Locating the electricity infrastructure nearby could help connect the datacentre to a large power supply more efficiently.

The deal follows reports that the UK government selected Teesworks for the datacentre. National Grid said the agreement would support AI, digital technologies and the region’s next industrial phase. The company also said it would work with partners to progress development as quickly as possible.

An electricity substation is a facility that receives power from the grid, changes its voltage and routes it onward. Voltage changes make long-distance transmission and local delivery practical. Substations also contain equipment that helps control and protect the network.

A datacentre uses electricity continuously for computer servers, cooling systems and other essential equipment. Its demand can be far larger than that of a normal building. A nearby substation can provide a direct connection to high-capacity grid infrastructure, reducing the distance between the network and the site.

For Teesside, the proposed substation is intended to support a huge neighbouring AI datacentre. National Grid has agreed to buy 29.5 hectares for the facility. The project matters because access to sufficient power quickly has become a central challenge for datacentre developers in Britain.

The planned Teesside datacentre would span nearly 500,000 square metres, according to submitted planning applications. The associated electricity infrastructure could provide up to 3.2GW of capacity. Together, those figures describe a project at an unusually large industrial scale.

A gigawatt is one billion watts, so 3.2GW means up to 3.2 billion watts of electrical capacity. In practical terms, that is enough to support a vast concentration of computing equipment and cooling systems, though the datacentre would not necessarily use the maximum amount at every moment. Capacity describes what the connection can supply.

Ben Houchen said having up to 3.2GW would help Teesside compete for major AI projects. The government has identified datacentres as fundamental infrastructure, but the figures also underline why new grid equipment and planning are needed.

Datacentres need enormous, dependable electricity supplies before their servers can operate. Developers therefore need a confirmed grid connection, suitable cables and substations, and enough generation and network capacity nearby. If those pieces are unavailable, construction or operation cannot proceed at the planned scale.

Ben Houchen said everyone trying to build a datacentre in Britain knows the biggest problem is getting enough power to a site quickly. He said projects had been stuck in a queue while the US, Gulf and parts of Europe attracted investment. The Teesside proposal aims to offer up to 3.2GW of capacity.

The obstacle is not simply finding land. Grid upgrades require agreements, planning, engineering and construction. National Grid’s land purchase is an early step toward the needed infrastructure. Faster access could make Britain more competitive, but opposition to datacentres may create another challenge.

The substation and datacentre could support Teesside’s next phase of industrial and economic development. National Grid said the project would support AI and digital technologies. A large facility could also help the region compete for investment that currently goes to places with faster access to electricity.

Ben Houchen argued that up to 3.2GW would let Teesside compete for major datacentre projects. He also said British AI capability needs physical sites where sensitive data can be stored on British soil. The substation is the mechanism that could make such a high-power site possible.

The outcome is not guaranteed. The substation is still being progressed, and Balfour Beatty was only reported to be in line to deliver it. Datacentre construction also faces strong public opposition, from Auchtertool to Brick Lane. Government policy aims to ensure host communities benefit.

National Grid is the electricity infrastructure company buying 29.5 hectares at Dorman Point. It intends to progress a major substation and said it would work with partners. Teesworks, a local private-public partnership, owns the wider site where the land is located.

Ben Houchen, mayor of the Tees Valley combined authority, is a public advocate for the project. He highlighted its possible 3.2GW capacity and its importance for attracting AI investment. Balfour Beatty was reported to be in line to deliver the substation for National Grid. Steel River Power, or SRP, was described as heavily involved.

The article does not confirm that Balfour Beatty has won the work. Balfour Beatty and SRP were approached for comment. National Grid’s purchase is therefore a significant step, but further development, contracting and construction still need to progress.

Electricity generally moves from power stations and renewable generators into high-voltage transmission networks. Substations change voltage and direct flows between parts of the system. Near a datacentre, another voltage change and a dedicated connection can deliver power at a level the facility’s equipment can use.

The mechanism is a sequence of connected assets: generation, transmission lines, substations, distribution equipment and the datacentre connection. Each link must have enough capacity and protection. If a site needs several gigawatts, ordinary local infrastructure may be insufficient, so a substantial new substation and network works may be required.

Expansion can take years because developers must secure land, agree connections, obtain planning approval, order specialist equipment and build safely. The Teesside land purchase is an early step, not a finished grid connection. The article shows why rapid datacentre growth can collide with slower infrastructure delivery.