Britain’s Biggest Clean Power Projects Among 2.4GW Of Transmission Connections National Grid Delivers In 2025
The title of this post, is the same as that of this press release from National Grid.
This is the sub-heading.
Record-breaking renewable power projects are among the 2.4GW of new generation connections we plugged into our transmission network during 2025, in another key step in the UK’s clean energy transition.
This first paragraph adds some detail to the headlines.
This year’s works build on the 3GW of connections we delivered in 2024 – which included a new interconnector between Wales and Ireland – and is part of 12.6GW of generation capacity we’ve connected in England and Wales over the past five years.
The rate of connections appear to have been fairly steady over the last five years, at about 2.5 GW/year.
Three projects are highlighted.
- In April the 373MW Cleve Hill Solar Park, Britain’s largest solar array, began exporting power across the network following work to connect it at our Cleve Hill substation in Kent.
- Over summer Statera Energy’s Thurrock Storage project, the country’s biggest battery energy storage system (BESS), connected at our Tilbury substation in Essex to add 300MW of flexible capacity across London and the south east.
- And in September we completed upgrades and commissioning activity at our Lackenby substation in North Yorkshire in readiness for RWE’s Sofia offshore wind farm – one of the world’s biggest – to complete construction.
They also completed works for more than 400MW of additional BESS connections during the year, including a 150MW scheme connecting at Ferrybridge substation in West Yorkshire, a 100MW facility plugging in at Thornton substation in North Yorkshire, and further projects at our substations in Enderby (Leicestershire), Rainhill (Merseyside) and Bredbury (Greater Manchester).
I think that adds up to ten projects in total.
It looks like National Grid had a good year.
The Anonymous Widower 
In addition to NG the two Scottish Transmission Operations along with all the DNOs will have been connecting renewables/BESS up as well of course at a lower power level. All great but for me its largely with imported kit and I feel historians will look back and decry the failure of our politicians nit to have adequately capitalised on the opportunity they created here with NZ.
Comment by Nicholas Ronald Lewis | January 6, 2026 |
The sooner we prove that Highview’s 300 MW/3.2 GWh with their stability island works the better and then we can roll out Highview’s plan for sixteen of the monsters.
Comment by AnonW | January 6, 2026 |