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XRN 5383
LDZ Stock Change and Embedded LDZ Unique Sites - new service

Last Updated
19 Jul 2021
Release Type
Implementation Date
Proposer National Grid Impacted DSC service area


To be confirmed

Customer Change Team Leader


National Grid has advised the DNs that from Q1 2022, it will withdraw its ‘Daily LDZ CV (FWACV)’ Service. Xoserve will be taking over the service in its entirety from National Grid.


Within the existing NG/DNs’ FWACV processes, there are several combined data flows that contain data that is (or will not be) required to calculate the FWACV.


However, those additional (non-FWACV) data items are still required for various critical downstream processes including energy balancing, reconciliation, settlement and UIG calculations.


Please provide an HLSO with costs and delivery timescales for the following:


Xoserve will receive AI files from DNs with data items required to calculate LDZ FWACV. Xoserve will also develop the capability to transfer the FWACV data direct into Gemini.


National Grid requires Xoserve to build additional capability of accepting two extra data items (listed in the CP) that are sent from the DNs (to Xoserve) on the AI files, and parse these data items into Gemini.

Impacted Customer Types

  • NGT
  • Shipper
  • DNO


Document title Last updated Type
XRN 5383 28/Jun/2021 PDF


Initial Review
Change Proposal Raised 28/06/21
Status Awaiting ChMC approval
Expected: 07/07/21
Status ChMC approved into Capture
Solution Consultation
Expected: 00/00/00
Status Awaiting
Awaiting Delivery
Expected: 00/00/00
Status Awaiting
In Delivery
Expected: 00/00/00
Status Awaiting
Expected: 00/00/00
Status Awaiting

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