Margam Connection
We are proposing an extension to the existing substation at Margam, along with an underground cable route. This will support the electrification of Tata Steel’s new electric arc furnace and provide capacity for future connections. In doing so, it would play a key role in securing jobs in the area and supporting the creation of green steel.
We have a legal obligation to connect customers to our network when a connection is requested.
Community impact
We always plan to complete any work with the minimum of disturbance to the local community and businesses near to our sites.
The substation extension will be on land already owned by National Grid so any construction work would be within this area. This substation will be connected to one on Tata steel land via an underground cable.
We have completed numerous surveys and assessments onsite details of which will be available in our planning application to Neath Port Talbot Council.
Pre-application consultation
We undertook a statutory pre-application consultation from 11 September to 09 October 2025.
Thank you to those who provided feedback during the consultation. We will be preparing a Pre-Application Consultation Report summarising how we have delivered consultation and the feedback we have received.
We will then submit our planning application to Neath Port Talbot Council.
The application documents are still listed below to view.
Contact us
For further information or to ask a question, please contact us by email at [email protected], or call 0800 024 1437.
Cysylltiad Margam
Rydym yn cynnig estyniad i'r is-orsaf bresennol ym Margam, ynghyd â llwybr cebl tanddaearol. Bydd hyn yn cefnogi trydaneiddio ffwrnais arc trydan newydd Tata Steel ac yn darparu capasiti ar gyfer cysylltiadau yn y dyfodol. Wrth wneud hynny, byddai'n chwarae rhan allweddol wrth sicrhau swyddi yn yr ardal a chefnogi creu dur gwyrdd.
Mae gennym ymrwymiad gyfreithiol i gysylltu cwsmeriaid â'n rhwydwaith pan ofynnir am gysylltiad.
Effaith cymunedol
Rydym bob amser yn bwriadu cwblhau unrhyw waith gyda chyn lleied o aflonyddwch â phosibl i'r gymuned leol a busnesau sy'n agos at ein safleoedd.
Bydd estyniad yr is-orsaf ar dir sydd eisoes yn eiddo i'r Grid Cenedlaethol felly byddai unrhyw waith adeiladu o fewn yr ardal hon. Bydd yr is-orsaf hon wedi'i chysylltu ag un ar dir Tata Steel trwy gebl tanddaearol.
Rydym wedi cwblhau nifer o arolygon ac asesiadau ar y safle a bydd manylion amdanynt ar gael yn ein cais cynllunio i Gyngor Castell-nedd Port Talbot.
Ymgynghoriad cyn-ymgeisio
Cynhaliwyd ymgynghoriad cyn-ymgeisio statudol gennym o 11 Medi i 09 Hydref 2025.
Diolch i'r rhai a roddodd adborth yn ystod yr ymgynghoriad. Byddwn yn paratoi Adroddiad Ymgynghoriad Cyn-ymgeisio yn crynhoi sut rydym wedi cynnal yr ymgynghoriad a'r adborth a dderbyniwyd.
Yna byddwn yn cyflwyno ein cais cynllunio i Gyngor Castell-nedd Port Talbot.
Mae dogfennau'r cais dal ar gael i'w weld isod.
Cysylltwch â ni
Os oes gennych unrhyw gwestiynau, cysylltwch â ni trwy e-bost ar [email protected], neu ffoniwch 0800 024 1437.
Document Library
Notices
Agricultural
Air Quality
Arboricultural
Carbon
Construction and environmental management plans
- Construction Environmental Management Plan (CEMP)
- Construction Logistics Plan (CLP)
- Surface Water Management Plan (SWMP)
- Waste Management Plan (WMP)
Ecology
- EcIA Supporting Cover Letter
- Ecological Impact Assessment (EcIA)
- Habitat Management Plan (Margam Burrows)
- Landscape and Habitat Man Plan (LHMP)
- Shadow Habitat Regulations Assessment (sHRA)
- Botanical Survey Report
- Breeding Bird Survey Report
- Great Crested Newt Survey Report (GCN)
- Bat Survey Interim Report
- Interim Invertebrate Survey Report
- Reptile Survey Report
- Water Vole and Otter Report
- Wintering Birds survey Report
EMF
Fire Strategy
Flood Risk and Drainage
Ground Investigation
Heritage
Landscape and Visual
- Figure L7 - Landscape Mitigation Area Planting Plan
- Figure L8 - Landscape and Habitat Strategy Plan
- Figure L9 -Landscape Plan
- Margam SuDS and Ditch Indicative Sections and Specification
- Margam Substation Landscape Visual Appraisal Addendum
- Margam Substation Landscape Visual Appraisal
Lighting Assessment
Noise
Peat Management
Piling Method
Planning Application Drawings
- Margam - Existing General Arrangement Elevations
- Margam Amenities Building - Existing and Proposed Demolition
- Margam Amenities Building - Fire Strategy Plan
- Margam Amenities Building - Level 00 General Arrangement Proposed Floor Plan
- Margam Amenities Building - Proposed Elevations and Materials
- Margam Amenities Building - Proposed General Arrangement Sections
- Margam Drainage Attenuation Details
- Margam Drainage Layout
- Margam Fencing Details
- Margam GIS Hall - Proposed Floor Plan - GIA & GEA Plans
- Margam GIS Hall - Demolition Site Plan
- Margam GIS Hall - Existing Context Elevations
- Margam GIS Hall - Existing Site Plan
- Margam GIS Hall - Fire Strategy Level 00
- Margam GIS Hall - Level 00 General Arrangement
- Margam GIS Hall - Level 01 General Arrangement
- Margam GIS Hall - Location Plan
- Margam GIS Hall - Proposed Context Elevations
- Margam GIS Hall - Proposed General Arrangement Elevations
- Margam GIS Hall - Proposed General Arrangement Sections
- Margam GIS Hall - Proposed Materials
- Margam GIS Hall - Proposed Site Plan
- Margam GIS Hall - Roof Plan General Arrangement
- Margam GIS Hall - Water Tank
- Margam Swept Path Analysis Layout Sheet 01 of 02
- Margam Swept Path Analysis Layout Sheet 02 of 02
Planning and Design and Access Statement
- Application form for Margam Substation
- Design and Access Statement (DAS) Margam
- Green Infrastructure Statement
- Planning Statement
Siting Study
Sustainability
Transport Assessment
 
 