NGET licence modification Large Onshore Transmission Investment: decision
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At RIIO-ET2 Final Determinations, National Grid Electricity Transmission (NGET) were provided funding in its baseline allowance to deliver substation works at the Melksham substation to connect a customer at the Hinkley Point C nuclear power station, with a delivery date in its electricity transmission licence of 31 December 2024.
Due to delays completing Hinkley Point C by the developer, NGET has postponed completion of the Melksham substation works until 2028 to align with the revised forecast completion date.
This is a decision to modify the delivery date in Special Condition 3.13 Large Onshore Transmission Investments Re-opener of NGET’s electricity transmission licence.
Main document
[Decision to modify Special Condition 3.13 in NGET's electricity transmission licence: Melksham substation works [PDF, 228.16KB]
](https://www.ofgem.gov.uk/sites/default/files/2025-07/Melksham-Final-Decision.pdf)
Subsidiary documents
[Direction to modify licence for NGET's electricity transmission licence [PDF, 179.37KB]
](https://www.ofgem.gov.uk/sites/default/files/2025-07/Licence-Modification.pdf)