Avonmouth

Current construction activity

Overview – Summer 2023

National Grid is moving into the final stage for completing the north section of the Hinkley Connection route between Sandford and Seabank substations.  

The new 400,000 volt lattice pylons in and around Avonmouth are now complete.  

Rather than using the T-pylons seen elsewhere on the Hinkley Connection route, we’re using the traditional lattice design. At approximately 50 metres high, they provide the height required across the River Avon and can navigate the tighter turning angles through Avonmouth’s industrial port area to complete and connect the final section of the route into Seabank substation. 

To make way for the new 400,000 volt connection route, we are removing 67 kilometres of existing 132,000 volt lattice pylons and overhead wires stretching the landscape. 248 of the 249 lattice pylons have now been removed.  

In August 2023, we waved goodbye to the two 91-metre pylons that once stood on either side of the bank of the River Avon. In the same month, we removed the line of pylons from Avonmouth village residential area, including the pylon that loomed over Avonmouth C of E Primary School and Daisy’s Nursery.  

Near Seabank substation, our contractor, J Murphy and Sons, are continuing their work to modify  the existing electricity network, replacing nearby pylons at Crooks Marsh with new underground cables.  

Thank you from everyone working on the project for your patience and understanding as we work to towards full completion of this project which will play such a key role in helping the UK meet its net zero ambitions by transmitting cleaner, homegrown, energy around the UK – enough to power 6 million homes and businesses. 

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Take a look at our detailed map

Avonmouth timeline