Submarine Electricity Cable replacement works

Fifty-nine Scottish islands are connected to the mainland electricity network via submarine electricity cables. 

As these cables naturally come to the end of their operational life, Scottish and Southern Electricity Networks make arrangements to replace them to ensure a continued reliable electricity supply to Scotland’s islands.

The introduction of Scotland's National Marine Plan (2015) means we may need to change the way we install new or replacement cables within the marine environment. 

We are committed to consulting with all parties who have an interest in how these cables are installed, from the customers who rely on the electricity to the marine users who may be impacted.





For the past three years, we have been working collaboratively with our stakeholders to develop a Cost Benefit Analysis methodology which allows us to model the value to society of different engineering practices. We use the output  to help us find the most sustainable cable installation and protection method for each cable we replace.

In response to feedback, we have strengthened the model to reflect:

• Increased health costs associated with increased fuel poverty

• Seabed natural capital value

Shore End Snow

A snowy shore end in Orkney - the submarine electricity cable at Rousay.


The Rousay Westray marine licence application can be viewed online or at:

  • Orkney Library & Archive, 44 Junction Road, Kirkwall, Orkney KW15 1AG
  • Westray Development Trust, Unit 1, Quarry Road, Westray, Orkney KW17 2DF
  • Rousay, Egilsay & Wyre Development Trust, The Manse, Rousay, Orkney KW17 2PR