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v1.0Current version

Published25/08/2026Effective date31/03/2027Release date25/08/2026

DNO Data Reporting

Document Summary

What?This rule defines the minimum dataset for reporting DNO flexibility procurement and dispatch activity.How?DNOs must submit a standardised dataset covering CMZs, flexible units, tenders, bids, and dispatch events in accordance with this rule.Who?This rule applies to all DNOs within the Market Facilitator’s scope.When?This rule comes into force on the Implementation Date, with data submitted at least monthly.Why?To improve the timeliness, consistency, and transparency of Flexibility Market data.

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DNO Data Reporting - Flexibility Market Rules - Elexon

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0.0

Sections 1, 2, 3 and 4 form the legally binding Flexibility Market Rule.

Defined terms capitalised in this document shall have the meaning given in Section 4.

GuidanceSummary of DNO Data Reporting Rules

This section is provided as guidance to the Flexibility Market Rule. Therefore, it is not legally binding and falls outside of the formal change management process.

Context

The DNO Data Reporting Rule is intended to improve the transparency, consistency, and availability of data relating to DNO flexibility procurement and dispatch activity. It sets out the minimum reporting requirements that DNOs must follow when submitting data to the Market Facilitator, so that Flexibility Market activity can be monitored and understood more effectively.

This rule applies to DNOs operating within the scope of the Market Facilitator and covers reporting on flexibility procurement and dispatch activity across Sub-Markets in scope of the rule.

DNO Data Reporting Rules Requirements

The rule sets out some core requirements:

DNOs must provide the required procurement and dispatch data to the Market Facilitator in line with the dataset specification set out in the rule.

We believe the impact of these requirements to be:

Impact on System Operators	Impact on FSPs
DNOs must develop and maintain the processes and systems needed to collect, validate, and submit the required procurement and dispatch data. The Market Facilitator must be able to receive, process, and publish or use that data for monitoring purposes.	Providers may benefit from improved transparency, frequency and consistency in reported market information, supporting a better understanding of procurement activity, dispatch volumes, and market opportunities.

Implementation monitoring requirements

The key requirements are laid out below. A view across the rules is available in our deadline tracker.

Category	Requirement	Trigger for data submission	What we will do with it
Implementation tracking	Basic tracking of implementation status and target date	20 working days after the published date. Within 10 days of change	Track whether implementation is on track via our Implementation tracker.
Flexibility Market Catalogue data	N/A	N/A	N/A
Rule-specific data collection	Submission of the required procurement and dispatch dataset	Monthly, no later than 15 Working Days after the end of each month. First submission to cover 01/04/2027 – 31/05/2027	Monitor DNO procurement and dispatch activity and support publication, analysis, and market transparency.
Effectiveness monitoring data	N/A	N/A	N/A

1Applicability of this Flexibility Market Rule

1.0

This Flexibility Market Rule applies to all Distribution Network Operator (DNO) Sub-Markets within the Market Facilitator’s scope. Innovation trials are not bound by this Flexibility Market Rule.

All DNOs shall provide the data required under Section 3 in accordance with the data field definitions and dataset specification set out in Section 2.

Variations to this rule are only permitted with an approved Derogation from the Market Facilitator.

The core dates for this Flexibility Market Rule are laid out below.

Table 1: Flexibility Market Rule dates

Published Date	25/08/2026
Implementation Date	31/03/2027
End Date	-

2Flexibility Procurement and Dispatch Data Reporting Requirements

2.1Dataset Specification (Mandatory Data Fields)

2.1.1

Scope of Dataset
The data fields in this Section apply to all flexibility procurement and dispatch activity undertaken by a DNO within each Sub-Market in scope of this Flexibility Market Rule during the Reporting Period.

DNOs must report every tender round, procurement outcome, contracted service, dispatch event, and unmet flexibility need.

Each Tender, Bid, Flexible Unit, and Dispatch record must be uniquely identifiable and linked through the relevant identifiers (including, but not limited to, Tender ID, Bid ID, Dispatch ID and Flexible Unit ID) to enable full traceability between procurement activity, contracted services, associated assets, and dispatch events.

2.1.2

Locational Information

This captures the characteristics of constraint management zones that define the location of procurement and dispatch activity.

DNOs must submit the following data for each constraint management zone associated with procurement activity:

CMZ ID
Constraint Management Zone Name
Grid Supply Point ID
Grid Supply Point Name
Constraint Licence Area
Maximum Connection Voltage (kV)

DNOs may choose to submit the following optional data:

CMZ Type
CMZ Description

2.1.3

Flexible Unit Information

This captures the characteristics of flexible assets participating in procurement, including location, technology, and capacity.

DNOs must submit the following data for each flexible unit associated with procurement activity:

Flexible Unit ID
Service Provider
Main Technology
Secondary Technology/Generating Technology (where applicable)
Flexible Unit Capacity (MW)
Flexible Unit Capacity (MVAr)

DNOs may choose to submit the following optional data:

Charging Source (if Storage)
Payback Type (if Demand/Import)

2.1.4

Tender Information

This captures the key characteristics of each tender round, including the procurement requirements, location, and delivery parameters.

DNOs must submit the following data for each tender round:

Tender ID
Tender Description
Constraint Management Zone ID
Product
Product Variant (Where Applicable)
Constraint Trigger
Delivery Year
Tendered Delivery Start Date
Tendered Delivery End Date
Potential Service Days
Potential Service Months (Where Applicable)
Service Windows FROM (Where Applicable)
Service Windows TO (Where Applicable)
Tendered Capacity (MW)
Tendered Capacity (MVAr)
Service Direction (export+/import- or export-/import+)

DNOs may choose to submit the following optional data:

Tender Group ID
Service Window Description

2.1.5

Bid Information

This captures the bids submitted into each tender, including bid volumes, commercial terms, and outcomes.

DNOs must submit the following data for each bid submitted into a tender:

Bid ID
Tender ID
Bid Outcome
Bid Capacity (MW)
Maximum Run Time (hh:mm)
Response Time (hh:mm)
Original Availability Fee Bid (£/MW/hr)
Original Utilisation Price Bid (£/MWh)
Agreed Availability Fee (£/MW/hr)
Agreed Utilisation Price (£/MWh)
Service Fee (£/MWh)
Accepted Bid Capacity (MW)
Accepted Service Windows FROM (Where Applicable)
Accepted Service Windows TO (Where Applicable)

DNOs may choose to submit the following optional data:

Service Fee (£/MWh)

2.1.6

Dispatch Information

This captures dispatch instructions issued under procured contracts, including operational delivery volumes, timing, and commercial parameters.

DNOs must submit the following data for each dispatch instruction issued:

Dispatch ID
Bid ID
Start Date of Instruction (DD/MM/YYYY)
Start Time of Instruction (HH:MM)
End Date of Instruction (DD/MM/YYYY)
End Time of Instruction (HH:MM)
Dispatched Capacity (MW)
Requested Volume (MWh)
Delivered Volume (MWh)
Dispatched Capacity (MVArh)
Requested Volume (MVArh)
Delivered Volume (MVArh)

DNOs may choose to submit the following optional data:

Grid Intensity Type (Short Run /Long Run)
Linked Bid ID (Manual Override)
Linked Flexible Unit ID (Manual Override)

3Market Information

3.1Implementation tracking

The relevant System Operators must provide the Market Facilitator with the data set out in Table 2 for each Sub-Market in scope of this Flexibility Market Rule. The data provided should accurately reflect their implementation of the rule within each of each Sub-Market.

The expected values required for compliance are also set out in Table 2.

Initial data shall be sent no later than 20 working days after the Published Date of this Flexibility Market Rule.

Updates shall be sent as soon as reasonably practical, and no later than 10 working days after any changes to the values.

Elexon reserves the right to publish this data within its Implementation Tracker.

Table 2: Implementation tracking requirements

FMR-DDR	Parameter	Required value (per Sub-Market)
Implementation Status	Dependent on date: Before Implementation Date: Not yet started, Implementing, Paused, Implemented Between Implementation Date and End Date: Implemented After End Date: Superseded
Target Implementation Date	No later than Implementation Date

FMR-DDR

Parameter

Required value (per Sub-Market)

Implementation Status

Dependent on date:

Before Implementation Date: Not yet started, Implementing, Paused, Implemented
Between Implementation Date and End Date: Implemented
After End Date: Superseded

Target Implementation Date

No later than Implementation Date

3.2Flexibility Market Catalogue data

Not used for this Flexibility Market Rule.

3.3Effectiveness monitoring

There are no Market Facilitator metrics for this rule

3.4Rule Specific Data Collection

DNOs must provide the Market Facilitator with all data fields listed in Section 2 on a monthly basis as a minimum. This Rule does not prevent System Operators from submitting data more frequently where such data is already available or published.

For the purposes of the first monthly submission, the Reporting Period shall be 01/04/2027 to 31/05/2027 inclusive. Each DNO must submit the required data for that period no later than 15 Working Days after 31/05/2027.

Thereafter, each monthly submission must relate to the previous calendar month and must be submitted no later than 15 Working Days after the end of that month. For example, a submission made in July must cover data for the period 01/06 to 30/06 inclusive.

Reporting information must be complete, accurate, and internally consistent, and must conform to the data field definitions in Section 2.

The data submitted must accurately reflect the DNO’s actual procurement and dispatch volumes for the relevant month.

Where a material error or omission is identified in any monthly submission, the DNO must submit corrected information within 5 Working Days of notification.

The Market Facilitator may request clarifications or supporting information relating to monthly submissions, and DNOs must provide such information promptly.

Elexon, in its role as Market Facilitator, reserves the right to publish the submitted data - whether in full or aggregated form - via the Market Data Portal.

4Glossary

4.0

The following definitions are specific to this Flexibility Market Rule. These are supplemented by the definitions in the Market Facilitator Glossary. If there is an inconsistency between definitions, the definition in this document shall prevail.

Glossary

Term	Aliases	Definition
Reporting Period	-	in respect of data submitted under section 3.4 of FMR-DDR, the period of time to which the submitted data should relate. The first Reporting Period shall be 01/04/2027 to 31/05/2027 inclusive. Each subsequent Reporting Period shall be a calendar month, beginning on the first day of that month and ending on the last day of that month. More frequent submissions by a System Operator shall not create additional Reporting Periods.

FMR: DNO Data Reporting Rules - Amendment record

Guidance

This section is provided as guidance to the Flexibility Market Rule. Therefore, it is not legally binding and falls outside of the formal change management process.

Version	Published Date	Document Status	Description of Changes	Change Proposal Reference	Market Facilitator Decision Report Ref
1.0	25/08/2026	Final	Document Published	CP005	CP005

4.0.2

Annex 1: Associated meta-data

Guidance

This annex is provided as guidance to the Flexibility Market Rule. Therefore, it is not legally binding and falls outside of the formal change management process.

Identifier	FMR‑DDR
Title	DNO Data Reporting
Type	Flexibility Market Rule
Collection	Market Coordination
Audience	DNOs
Expertise	Market Design, Data Reporting, Flexibility Markets
Owner	Market Facilitator
Expected benefit	Reduced reporting burden for DNOs and improved transparency, consistency and availability of procurement and dispatch data for FSPs, enabling more informed participation, clearer comparison of market opportunities, and better development of Flexibility Markets.
Related end-to-end process reference	V.6 – Report on Service Delivery
References
IsReferencedBy	FMR-PD
Published version number	1.0
Applicability	All DNO sub-markets
Published Date	25/08/2026
Implementation Date	31/03/2027
End Date	N/A
Terms of variations	Approved Derogation
IsReplacedBy	N/A
Replaces	N/A
Status	Final
Change since last version	N/A
Description	What? This rule defines the minimum dataset for reporting DNO flexibility procurement and dispatch activity. How? DNOs must submit a standardised dataset covering CMZs, flexible units, tenders, bids, and dispatch events in accordance with this rule. Who? This rule applies to all DNOs within the Market Facilitator’s scope. When? This rule comes into force on the Implementation Date, with data submitted at least monthly. Why? To improve the timeliness, consistency, and transparency of Flexibility Market data.