List of Change Releases for 2026 - Elexon BSC

List of Change Releases for 2026 - Elexon BSC You are here: Home Releases List of Change Releases for 2026 List of Change Releases for 2026 This page sets out the different Release information for each of the releases that are scheduled for 2026. The page includes information for Standard Releases, which take place three times per year; Non-Standard Releases, which are scheduled for Regulatory driven changes; and Special Releases which have a recommended Implementation Date of [five] Working Days following Ofgem approval. 16 January 2026 Special Release Implementation date The approved date for this release is 2 Working Days after Authority Approval. Therefore, P506 will be implemented on 16 January 2026 . Approved amendments You can find the approved amendments for each document for P506 on the relevant change page. Scope of the Release The following changes are in scope: Approved Changes P506 Unfreezing specific MDD entities to allow legacy Suppliers access to newly-Qualified LDSOs’ networks during MHHS Transition February 2026 Release Implementation date The approved date for this release is 26 February 2026 . Approved amendments You can find the approved amendments for each document for each Change on the relevant Change page. Scope of the Release The following Changes are in scope: Approved Changes P498 Ensuring Correct Data Flows for Licence Exempt Supplies P504 Inclusion of Virtual Trading Parties as Performance Assurance Parties CP1619 Creation of Category 3 BSC Configurable Items for Accurate/Limited Status and Settlement Performance Weightings of Consumption Component Classes CP1621 Remove Erroneous D0300 reference from BSCP709 CP1623 Update Terminology and Processes within BSCP537 to Support Enduring Qualification CP1624 Adding Placing Reliance within BSCP537 CP1625 Adding Pre Qualification Survey within BSCP537 Impact of documentation You can see a complete list of BSC documents impacted by the 26 February 2026 Standard Release in the Document Impact Matrix. Document Impact Matrix 26 March 2026 Non-Standard Release Implementation date The approved date for this Release is 26 March 2026 . Approved amendments You can find the approved amendments for each document for each change on the relevant change page. Scope of the Release The following changes are in scope: Approved Changes CP1606 Enabling mismatches in data between CSS and MPRS to be corrected CP1612 Extend Customer Direct Contract requirements from 1130 days to 1827 days in BSCP706 CP1618 Improvements to the processes relating to P0310 and P0311 files CP1626 Aligning character limits for Asset Meter make and model CP1627 Amendment of Initial Market Segment for whole current Metering Systems Impact of documentation You can see a complete list of BSC documents impacted by the 26 March 2026 Non-Standard Release in the Document Impact Matrix. 1 April 2026 Non-Standard Release Implementation date The approved date for this release is 1 April 2026 . Scope of the Release The following changes are in scope: CP1620 New Supplier report showing Final Consumption Levy and BSUoS charge exemption volumes Impact of documentation The Document Impact Matrix lists all impacted configurable Items and other documents. Document Impact Matrix 5 May 2026 Special Release Implementation date The approved date for this release is + 1 month after Authority Approval. Therefore, P507 Alternative Modification will be implemented on 5 May 2026 . Approved amendments You can find the approved amendments for each document for P507 on the relevant change page. Scope of the Release The following changes are in scope: Approved Changes P507 Alternative Modification Reverting legacy Half Hourly Scaling Factors to Pre-M10 values Impact of documentation The Document Impact Matrix lists all impacted configurable Items and other documents. Document Impact Matrix June 2026 Release Implementation date The approved date for this release is 25 June 2026 . Scope of the Release The following changes are in scope: P499 BSC Changes for GC0166: New Dynamic Parameters for Limited Duration Assets CP1630 Alignment of NHH Deemed Read Timescales in BSCP708 to BSCP504 CP1631 Update BSCP707 Appendix 2 to align with ISD process Configurable Items impacted by this Release Certain documents (in accordance with the Baseline Statement) are approved when the change is approved. Others following approval of the change, are drafted and approved as part of the Implementation Phase. All documents on the Baseline Statement are issued for industry consultation or comment and approved by the BSC Panel or a Panel Sub-Committee. Impact of documentation The Document Impact Matrix lists all impacted configurable Items and other documents. This will be uploaded soon. Document Impact Matrix November 2026 Release Implementation date The approved date for this release is 5 November 2026 . 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