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We operate 90,000km of overhead lines predominantly in rural locations. While overhead lines are widely accepted as being part of the countryside, there are a number of protected landscapes, including National Parks and Areas of Outstanding Natural Beauty (“AONB”) across our geographical footprint where removing our overhead lines and replacing them with underground cables would visually improve matters.

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Protected Landscapes

We coordinate the undergrounding of overhead lines with established steering groups consisting of representatives from AONBs and National Parks who help us identify and prioritise where work will take place.

We provide information and appropriate assistance to stakeholders to help them in scheme selection including budget costing and feasibility assessments.

During the RIIO-ED1 period we committed to underground 55km of overhead lines within National Parks and AONB. We are on track to meet this commitment by the end of the period having completed 38km (69%) to date.

Further details regarding our undergrounding schemes in National Parks and AONBs can be found in Appendix A.



 Target for RIIO-ED1Completed (to date)To be removed in 2021/22To be removed in 2022/23

South Wales

South West


East Midlands


West Midlands

WPD Total5538.47.118.3