Press Release

Balfour Beatty installs six offshore liners at Hinkley Point C

21 December 2023



Balfour Beatty, the international infrastructure group, today announces the successful instalment of six offshore liners at Hinkley Point C. This major milestone represents a crucial step forward as Hinkley Point C’s offshore work nears completion.

Installed up to two miles off the coast in the Bristol Channel, the second largest tidal range in the world, the six liners will play a significant role in the power station’s vital cooling water system.

Lowered through 40 metre steel casings placed in the seabed earlier in the year, the liners, each weighing up to 270 tonnes, will circulate 120,000 litres of water per second from the Bristol Channel through five miles of underground tunnels to provide cooling to the power station’s systems.

Reaching depths of 25 metres below sea level, each liner was designed with a world-first, innovative pre-installed isolation cap, allowing safe, ongoing access to the tunnels for the remaining construction works prior to being fully removed and stored for use, should future tunnel works be required.

Balfour Beatty’s Hinkley Point C Marine Works Project Director, Roger Frost, said: “This achievement is a significant step forward in our mission to contribute to the success of Hinkley Point C, a project that stands as a beacon for sustainable energy and engineering excellence.

“I am immensely proud of the progress we have made, and the depth and scale of this instalment demonstrates Balfour Beatty's capability to deliver innovative solutions for critical infrastructure.”

The instalment marks the near completion in the offshore works at Hinkley Point C, with over 1,000 experts from across Balfour Beatty and its supply chain involved in its success. The final elements of the offshore works are expected to complete in the first half of 2024.


Media enquiries to:

Tom Boorman

Balfour Beatty

+44 (0)203 810 2345 | follow us @balfourbeatty

All non-media related enquiries should be directed to +44 (0)20 7216 6800 or

 Notes to editors:

  • Balfour Beatty is a leading international infrastructure group with 25,000 employees driving the delivery of powerful new solutions, shaping thinking, creating skylines and inspiring a new generation of talent to be the change-makers of tomorrow.
  • We finance, develop, build, maintain and operate the increasingly complex and critical infrastructure that supports national economies and deliver projects at the heart of local communities.
  • Over the last 114 years we have created iconic buildings and infrastructure all over the world. Currently, we are working to deliver Hinkley Point C, the first UK nuclear power station in a generation; constructing the world-class arts and cultural facility, the Lyric Theatre, in Hong Kong; and designing, building, financing, operating and maintaining the Automated People Mover superstructure at the fifth busiest airport in the world, Los Angeles International Airport.
  • Balfour Beatty has over 60 years of experience in the nuclear and is currently working to deliver three packages of work required for Hinkley Point C, the first nuclear power station in a generation. Our expertise spans from large scale civil engineering to the delivery of electrical, control and instrumentation systems on new build, decommissioning and fuel cycle projects.  
  • Balfour Beatty support clients in delivering vital energy infrastructure across the UK. We have delivered solutions that form a key part of plans to harvest some of the UK’s most remote renewable energy sources and support the transition towards a Net Zero future. 

Thomas Boorman

Media & PR Manager