Switching Programme

Providing faster, more reliable switching for consumers

Ofgem launched the Switching Programme to encourage consumers to engage with the same energy market, and to improve their experience of doing so. Its aim to deliver reliable, next day switching for consumers by replacing the existing switching services with a new Centralised Switching Service (CSS).

Welcome to Xoserve’s CSS page. This is the central reference point for our customers on Xoserve’s involvement in, and perspective on, the delivery of Ofgem’s Central Switching Service.

We are committed to keeping our customers fully informed on the delivery of this programme. On a weekly basis, we’ll share our Weekly Progress Report, our Day After Reports (DARs) and our updated view on key risks:

  • Our weekly Switching Programme Status report; this is the weekly report we’re required to submit to the System Integrator, and we’re sharing here for our customers to have the same update
  • Day After Report summaries of key program meetings; these are basic notes that we capture during meetings to share with internal to help with consistent knowledge levels across Xoserve, and to provide a contact point if more information is required. We felt that our customers would benefit from seeing these notes should you wish to understand more about Xoserve’s interactions with the programme.
  • Summaries of the key risks: this is a summarised version of our risk log of topics we believe are affecting the programme and the work that we’re doing to address these risks.

Going forward, we’ll look to widen the information we share based on what our customers are asking to understand. If there are additional updates that you would like, or if you have a comment about any aspect of the programme, please contact Emma Lyndon


CSSC Programme S
ummary: 15th November 2019

On Wednesday of this week Xoserve engaged in a review of programme status and plans with the SI (Netcompany), this review included risk areas that we have been calling out on our weekly SI status reports.  A detailed discussion was held on current issues with Service Management requirements, there is still very little details to allow planning and internal engagement to take place.  Requirements and what is expected from ESP’s are still being discussed and finalised.  We raised the concern that this lack of detail being provided could impact Xoserve’s planning and preparedness for delivery, the SI has agreed to escalate these concerns.

Xoserve’s build and test activities from a consequential perspective were discussed with regards to the key CSSC programme milestone of the consequential change packs.  We confirmed that approval was given at Change Management Committee (ChMC) this Wednesday 13th November 19.  An update was provided to the SI on our build and test progress and planning for the consequential test phases including Gemini and batch.  Key raid items in relating to these activities were review jointly to ensure alignment.

There is a data provision programme milestone in January 2020 in readiness for testing.  Xoserve have advised this milestone is at risk as Xoserve have not received the data requirements, a “cut date” and confirmation what cut date for all parties to be used. We emphasised there is now a “day on day” slippage to achieve this date, the SI have picked this issue up for escalation.

We held our first Consequential Market Trials Workgroup last week, the meeting was very well attended with a really good level of interaction. The minutes will shortly be published on our website alongside questions and answers that were asked during the meeting.  As these meetings progress we will keep these Q&A’s updated and published.

CSSC Weekly Programme Status Reports

Switching Programme Weekly Status Report: 15th November 2019

Switching Programme Weekly Status Report: 15th November 2019

Last updated on 15 Nov 2019

Day After Report (DAR) Ofgem Data Working Group 23rd October 2019

Last updated on 28 Oct 2019

DAR for the SI Technical Data Working Group 3rd September 2019

Last updated on 06 Sep 2019

DAR for the Data Working Group 21st August 2019

Last updated on 23 Aug 2019

DAR for Service Management Integration Workshop 13th August 2019

Last updated on 21 Aug 2019

DAR for Ofgem Design Forum 12th August 2019

Last updated on 21 Aug 2019

Network Teleconference - 1st August 2019

Last updated on 09 Aug 2019

Data Working Group - Wednesday 17th July

Last updated on 19 Jul 2019

Switching Programme Delivery Group - Tuesday 16th July

Last updated on 19 Jul 2019

Design Forum - Monday 15th July

Last updated on 19 Jul 2019

Design Forum – Monday 1st July 2019

Last updated on 21 Nov 2019

Implementation Group – Tuesday 2nd July 2019

Last updated on 21 Nov 2019

Ofgem Testing Workgroup – Tuesday 2nd July

Last updated on 21 Nov 2019



CSSC Key Risks Summary

CSSC Key Risks Summary: 18th October 2019

Last updated on 18 Oct 2019



Last Extraordinary DSG Meetings for CSS Consequential Change Meeting - 4th September 2019

View Extraordinary DSG Meetings for CSS Consequential Change Meeting Monday 4th September 2019 documents.



Draft Business Requirements Documents

UK Link File Format Change Summary

Last updated on 09 Sep 2019

Switching Programme Consequential Change - Gemini Business Readiness Document (BRD) v0.2 (clean)

Last updated on 13 Nov 2019

Switching Programme Consequential Change - Gas Transporter (GT) Independent Gas Transporter (IGT) Business Readiness Document (BRD) v0.2

Last updated on 13 Nov 2019

Switching Programme Consequential Change - Shipper Business Readiness Document (BRD) v0.7 (Clean)

Last updated on 13 Nov 2019

Draft Central Switching Service Consequential (CSSC) Programme Plan on a Page

Last updated on 11 Mar 2019

CSSC End to End To-be Processes

Last updated on 23 Sep 2019

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