Puxton to Kenn

Current construction activity

Overview – Winter 2023

National Grid started work to build the north section of the Hinkey connection between Sandford and Seabank substations in July 2022.

We’re building 68 new T-pylons between Sandford and Portbury, and 27 traditional lattice pylons in Avonmouth to make the final connection into Seabank substation.

Using the innovative T-pylon design, reduces the height of the new infrastructure by a third. Standing at around 35 metres high – the T-pylon is a third shorter than traditional 400,000 volt steel lattice pylons which stand at around 48 metres. It also has a smaller footprint and uses less land.

To reduce the visual impact of the new 400,000 volt pylons, National Grid is removing 249 existing 132,000 volt lattice pylons, and overhead wires stretching 67 kilometres from the Somerset landscape. 

Thank you from everyone working on the project for your patience and understanding as we progress with this vital work to connect six million homes and businesses to new sources of homegrown, low carbon energy, and help the UK meet its net zero ambitions.

Register to receive project updates direct to your inbox.

Take a look at our detailed map

Puxton to Kenn timeline