Market Domain Data (MDD) is the central repository of Supplier Volume Allocation (SVA) market information. For the BSC arrangements to operate efficiently it' s essential that all Parties use the correct data. For further information please refer to the MDD Information Sheet

As a new Supplier you will need to populate MDD with details of your company, this can be done prior to or following receiving approval of your SVA Qualification from the Performance Assurance Board (PAB).

All changes made to MDD are scheduled, a copy of the latest MDD schedule which provides details of the change request deadlines can be found on the MDD Section of the website.

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What do I need to do?

Submit an MDD Change Request BSCP509/01 form along with Entity forms 1, 45 & 61 from BSCP509 Appendix prior to the change request deadline of the target MDD Go Live Date. All forms and queries should be sent to MDDC@elexon.co.uk and copies to Market Entry (market.entry@elexon.co.uk). These should be submitted as MS Word documents where possible.

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N.B the effective from date of your Supplier role and BM Units in MDD must align with the BM Unit and Party registration dates provided in BSCP15 & 65.