What is the difference between a Market Participant Identifier (MPID) and a Party ID?
A BSC Party ID is the main company identifier and is linked directly to the Company who signed the BSC accession agreement. BSC Parties that operate within the Supplier Volume Allocation (SVA) arrangements (Suppliers & LDSOs) will also have an (MPID). This is a four alpha character ID and is registered within Market Domain Data (MDD) which maintains key information essential to the operation of the SVA arrangements. For further information refer to the MDD information sheet (310Kb) .