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XRN 4914
MOD 0651- Retrospective Data Update Provisions

Last Updated
14 Nov 2023
Release Type
Implementation Date
Proposer Cadent Impacted DSC service area

Customer Change Team Leader


Please note that following Ofgem's decision to direct implementation of UNC Modification 0825 'Removal of the remaining Retrospective Asset, Address and Supply Point (RAASP) elements of the Retrospective Adjustment arrangements put in place under Modification 0434' - this Change Proposal has formally been withdrawn.

Following Ofgem’s decision to approve UNC Modification 0651‘Changes to Retrospective Data Update Provisions’ a change is needed to progress the delivery of requirements set out in this Modification.

Modification 0651 specifies that the CDSP will facilitate an industry wide Asset Data Cleansing exercise, allowing Shippers an opportunity to correct pre-existing asset data discrepancies by submitting an extract of their respective portfolio to Xoserve. Xoserve will then work collaboratively with Shippers to compare datasets and share outputs before agreeing on the course of action to be taken to apply updates to the Supply Point Register. In addition, 0651 sets out the principles of an enduring Retrospective Update solution which will allow Shippers to correct asset data discrepancies as and when these are identified.


Impacted Customer Types

  • IGT
  • Shipper
  • DNO
  • NGT


Document title Comment Last updated CHMC outcome
Change Proposal Approved 04//04/2019 Approved at ChMC 10/04/2019
Initial Review Stage not used N/A N/A
DSG Discussions N/A 02/12/2019 N/A
High Level Solution Options Stage not used - Solution Change Pack detailed below N/A N/A
Solution Review Solution Change Pack Comm Ref: 2844 - RT – PO 13/10/22 N/A
Detailed Design Stage not yet reached N/A N/A
Evaluation Quotation Reports (EQR) Stage not yet reached N/A N/A
Business Evaluation Reports (BER) Stage not yet reached N/A N/A
Change Completion Reports (CCR) (Retro Proof of Concept) Approved 13/01/2021 Retro POC CCR approved


Initial Review
Solution Consultation
Awaiting Delivery
In Delivery

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