Component History

This datafile contains list of weekly changes to the Components dataset by type and date.

NOTE: The following resource will begin receiving updates starting January 21st onwards.

CKAN Data API

Access resource data via a web API with powerful query support.
Further information in the main CKAN Data API and DataStore documentation.

The Data API can be accessed via the following actions of the CKAN action API.

Query
`https://api.neso.energy/api/3/action/datastore_search`
Query (via SQL)
`https://api.neso.energy/api/3/action/datastore_search_sql`

Query example (first 5 results)
`https://api.neso.energy/api/3/action/datastore_search?resource_id=015453e0-c73c-416a-901d-623f914c8e70&limit=5`
Query example (via SQL statement)
`https://api.neso.energy/api/3/action/datastore_search_sql?sql=SELECT * from "015453e0-c73c-416a-901d-623f914c8e70" LIMIT 5`

A simple ajax (JSONP) request to the data API using jQuery.

var data = {
  resource_id: '015453e0-c73c-416a-901d-623f914c8e70', // the resource id
  limit: 5 // get 5 results
};
$.ajax({
  url: 'https://api.neso.energy/api/3/action/datastore_search',
  data: data,
  dataType: 'jsonp',
  success: function(data) {
    alert('Total results found: ' + data.result.total)
  }
});

A simple ajax (JSONP) request to the data API using jQuery.

import urllib2
  url = 'https://api.neso.energy/api/3/action/datastore_search?resource_id=015453e0-c73c-416a-901d-623f914c8e70&limit=5'
  fileobj = urllib2.urlopen(url)
  print fileobj.read()

Download (CSV)

Data Explorer

Table Information

Auction Name

Title	Auction Name
Type	string
Description	Name of Capacity Market Auction
Comment
Example	Capacity Market Register 2027-28 (T-4)
Unit

Application ID

Title	Application ID
Type	string
Description	System generated ID for Application
Comment	ID is a combination of application type, delivery year and CMU ID
Example	A-T-4-2028-CMU123-00001
Unit

CMU ID

Title	CMU ID
Type	string
Description	ID of Capacity Market Unit - defined by Capacity Provider
Comment	6 characters alpha numeric
Example	18EG18
Unit

Component ID

Title	Component ID
Type	string
Description	ID of Capacity Market Unit and Component (where relevant) - defined by Capacity Provider
Comment
Example	EG00001
Unit

Type

Title	Type
Type	string
Description	Indicates the number of years leading up to the delivery year
Comment	Either T-1, T-3, T-4 or ST (Secondary Trade)
Example	T-1
Unit

Delivery Year

Title	Delivery Year
Type	integer
Description	First Delivery Year to which the Capacity Auction Relates to
Comment
Example	2024
Unit	Year

Attribute

Title	Attribute
Type	string
Description	The name of the column in CMU dataset where the value has changed
Comment
Example	Name of Applicant
Unit

Title	Previous
Type	string
Description	The attribute value in the previously published CMR
Comment
Example	Example Company A
Unit

Latest

Title	Latest
Type	string
Description	The updated attribute value, as at the change date
Comment
Example	Example Company B
Unit

Change Type

Title	Change Type
Type	string
Description	Type of change to value, new, removed or update
Comment	New/Removed/Update
Example	Update
Unit

Change Date

Title	Change Date
Type	date
Description	The date that the change was first reported on CMR (normally Wednesday)
Comment
Example	2025-05-21
Unit

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Component History

CKAN Data API

Data Explorer

Data Explorer

Table Information

Auction Name

Application ID

CMU ID

Component ID

Type

Delivery Year

Attribute

Previous

Latest

Change Type

Change Date