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Modification: P315

Publication of Gross Supplier Market Share Data

Proposer: SmartestEnergy Limited

Current Phase: Implemented

Category: Reporting

Implementation Date: 30 June 2016


P315 proposes to provide further transparency on Suppliers’ Meter Volume and MPAN counts.

To help all Parties understand the gross Supplier market shares, the volumes will exclude embedded generation and will be broken down by Market Participant ID (MPID), customer type, Active Export (AE)/Active Import (AI) and Half Hourly/Non Half Hourly.

Some market level consumption data will also be made available to a wider range of market participants.


The Modification and its Initial Written Assessment were presented to the BSC Panel at its meeting on 9 October 2014.

The P315 Assessment Report was initially presented to the Panel on 9 April 2015, but the Modification was sent back for further assessment. Over the P315 Assessment Procedure an impact assessment and three consultations on P315 were issued to industry participants.

The P315 Assessment Report was finally presented to the Panel on 13 August 2015, and the Workgroup recommended to the BSC Panel that the Alternative Modification should be approved. After consulting on its initial views, the BSC Panel recommended at its meeting on 10 September 2015 that the Alternative Modification should be approved.

On 20 October 2015 the Authority approved P315 Alternative Modification for implementation on 30 June 2016.


Supplier Market Share Data for Q4 2017  [12.7 Kb]
Document Date: 28 February 2018

Supplier Market Share Data for Q3 2017  [12.5 Kb]
Document Date: 22 November 2017

Supplier Market Share Data for Q3 2016  [14.8 Kb]
Document Date: 18 November 2016

P315 Authority Decision Letter  [176.6 Kb]
Document Date: 20 October 2015

P315 Final Modification Report  [2.0 Mb]
Document Date: 11 September 2015

P315 Report Phase Consultation  [1.6 Mb]
Document Date: 18 August 2015

P315 Assessment Report v2.0  [1.4 Mb]
Document Date: 18 August 2015

Assessment Procedure Consultation  [561.5 Kb]
Document Date: 6 February 2015

P315 Impact Assessment Responses  [242.5 Kb]
Document Date: 10 December 2014

P315 Impact Assessment  [582.1 Kb]
Document Date: 12 November 2014

P315 Modification Proposal Form  [167.7 Kb]
Document Date: 29 September 2014