DCP456: 'Market-wide Half Hourly Settlement (MHHS) Incremental Changes for Go-Live'

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Ofgem has decided to approve DCUSA Change Proposal DCP456: ‘Market-wide Half Hourly Settlement (MHHS) Incremental Changes for Go-Live'.

This change will come into effect on the same date as MHHS Implementation Milestone M8. 

Main document

[DCP456: 'Market-wide Half Hourly Settlement (MHHS) Incremental Changes for Go-Live' decision [PDF, 239.95KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-08/DCP456%20Market-wide%20Half%20Hourly%20Settlement%20%28MHHS%29%20Incremental%20Changes%20for%20Go-Live%20decision.pdf)

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