Decision on Authority-led BSC modification proposal P489

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Our decision to approve Balancing and Settlement Code (BSC) modification proposal P489 ‘Update approved P478 text to align with the latest MHHS Design’.  

Main document

[Ofgem decision to approve P489: ‘Update approved P478 text to align with the latest MHHS Design’ [PDF, 241.73KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-08/P489-Update-of-approved-P478-text-to-align-with-the-MHHS-Design.pdf)

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