Electricity supply
Decision to approve BSC modification proposal P478
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We have approved Balancing and Settlement Code (BSC) modification proposal P478 ‘Implementation of Market-wide Half Hourly Settlement (MHHS) Arrangements’.
This modification translates the MHHS design artefacts into code and delivers the code drafting that has been developed by and approved under the MHHS governance arrangements.
BSC modification P478 introduces the necessary obligations, processes and provisions into the BSC to enable a successful transition to the enduring MHHS governance and operational arrangements.
Main document
[P478 decision letter [PDF, 150.65KB]
](https://www.ofgem.gov.uk/sites/default/files/2024-11/P478_decision_letter_1.pdf)