Uplift to CSS Maximum Demand Volumes during MHHS Migration Period
Summary
This Change Proposal seeks to make the necessary updates to the REC, primarily to the Central Switching Service (CSS) Service Definition, to ensure that the Switching Operator is appropriately prepared for the increase in message volumes that will be created during the Market Wide Half-Hourly Settlement (MHHS) programme migration period.
Latest update and next planned activity
Date of latest update
Latest Update
This change was implemented as part of the the Extraordinary release on 28 March 2024. * This Change Proposal supports the transition to Market-wide Half Hourly Settlement.
Impacts Overview
Priority and rationale
High
Priority last updated on 29 May 2026
Solution development
Problem Statement
As part of the MHHS programme, it is necessary to migrate approximately 31 million MPANs from the existing settlement arrangements to those under the MHHS Target Operating Model. This will create a significantly increased volume of messages, whether for Switches or changes to Supplier Agents, for the CSS during the MHHS Migration Period. The CSS Service Definition does not currently require the Switching Operator to be capable of processing these additional volumes.
Proposed solution summary
- As an Electricity Consumer, I want the migration of my MPAN to the new HH Settlement arrangements to be as smooth as possible, so that the service I receive from my Electricity Supplier or it’s appointed agents is not interrupted As an Electricity Consumer, I want my ability to switch to be impacted as little as possible by MHHS migration activities
- As the Switching Operator, I want to be prepared for the increased volumes expected during the MHHS Migration Period. As the ERDS Provider, I want the CSS to be able to manage the volume of messages being sent so that I can provide the service I am required to during the MHHS Migration Period
- As an Electricity Supplier, I want the MPANs I select to the new HH Settlement arrangements to complete their migration without undue delay, so that the service I provide to Consumers is impacted as little as possible and so that I can meet my migration obligations As a MEM, as part of migration I want my new appointment and my legacy de-appointment to occur within the planned timescales so that the services I provide are impacted as little as possible As a Data Service, as part of migration, I want my new appointment to occur within the planned timescales so that the services I provide can commence in a timely manner As a Data Collector, I want my legacy de-appointment to occur within the planned timescales so that I have a clear understanding and smooth ending to the service I provide
No documents available.
Change Plan
Solution Analysis and Development completed
Completed
Start:
08 Feb 2023Due:
06 Apr 2023Completion:
04 Apr 2023Service Provider Preliminary Impact Assessment period started
Completed
Start:
06 Apr 2023Due:
06 Apr 2023Completion:
04 Apr 2023Service Provider impact assessment period completed
Completed
Start:
06 Apr 2023Due:
23 Oct 2023Completion:
23 Oct 2023Preliminary Change Report issued
Completed
Start:
23 Oct 2023Due:
17 Nov 2023Completion:
17 Nov 2023Responsible Committee review
Completed
Start:
17 Nov 2023Due:
29 Nov 2023Completion:
29 Nov 2023Consultation issued
Completed
Start:
29 Nov 2023Due:
01 Dec 2023Completion:
01 Dec 2023Consultation closed
Completed
Start:
01 Dec 2023Due:
15 Dec 2023Completion:
15 Dec 2023Final Change Report issued
Completed
Start:
15 Dec 2023Due:
12 Jan 2024Completion:
12 Jan 2024Responsible Committee decision
Completed
Start:
12 Jan 2024Due:
24 Jan 2024Completion:
24 Jan 2024Appeal Window closure
Completed
Start:
24 Jan 2024Due:
08 Feb 2024Completion:
08 Feb 2024Original submission
Change details
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8 Feb 2023
Change details
Uplift to CSS Maximum Demand Volumes during MHHS Migration Period
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Impacts
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Priority & timing
No
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Activity
Proposed solution summary changed to As an Electricity Consumer, I want the migration of my MPAN to the new HH Settlement arrangements to be as smooth as possible, so that the service I receive from my Electricity Supplier or it’s appointed agents i…
Proposed solution summary changed to As an Electricity Consumer, I want the migration of my MPAN to the new HH Settlement arrangements to be as smooth as possible, so that the service I receive from my Electricity Supplier or it’s appointed agents is not interrupted As an Electricity Consumer, I want my ability to switch to be impacted as little as possible by MHHS migration activitiesAs the Switching Operator, I want to be prepared for the increased volumes expected during the MHHS Migration Period. As the ERDS Provider, I want the CSS to be able to manage the volume of messages being sent so that I can provide the service I am required to during the MHHS Migration PeriodAs an Electricity Supplier, I want the MPANs I select to the new HH Settlement arrangements to complete their migration without undue delay, so that the service I provide to Consumers is impacted as little as possible and so that I can meet my migration obligations As a MEM, as part of migration I want my new appointment and my legacy de-appointment to occur within the planned timescales so that the services I provide are impacted as little as possible As a Data Service, as part of migration, I want my new appointment to occur within the planned timescales so that the services I provide can commence in a timely manner As a Data Collector, I want my legacy de-appointment to occur within the planned timescales so that I have a clear understanding and smooth ending to the service I provide.
Show moreImplementation Date has been updated to 28 Mar 2024.
harriet.truss has been allocated as Lead Analyst.
Orphaned SME: Lead Technical Analyst has been allocated as SME.