Message from Electricity System Operator

Despite the Capacity Market entering a “standstill period” last week following the ECJ ruling,  we have decided to continue operating the Capacity Market Notice (CMN) process.  This is because with 2,500+ subscribers we now see the potential publication of CMNs as a critical route through which tight electricity margins may be communicated to the market.

We also recommend accessing other information sources during tight margin periods, including:-

  • System Warnings page on the BMRS website. This is where National Grid ESO communicates any critical operational messages with the industry. These include Electricity Margin Notice (EMN) (previously known as Notice of Inadequate System Margin (NISM)), High Risk of Demand Reduction (HRDR) and Demand Control Imminent (DCI).
     
  • De-rated Margin values available on the BMRS website. These values follow a similar calculation to the Capacity Market Notice trigger and are communicated by National Grid ESO on a Day Ahead, 8hr, 4hr, 2hr and 1hr profile to give advance notice of potentially tight Settlement Periods on the Transmission System.

If you have any questions please contact National Grid ESO directly at emr@nationalgrid.com.

Message from Electricity System Operator

TEST MESSAGE

With the start of the new Capacity Market delivery year on 01 October 2018, this is a test of the Capacity Market Notice (CMN) website e-mail and text alert process.

We have manually issued this 'Message from Electricity System Operator' to test the email and text alert notification process based on the selections you made when subscribing to the website.

If you did not receive the expected email or text alert notification, please review your account settings by using the 'My Subscription' functionality on this website (top right of page).  If you have any further queries please contact National Grid ESO directly at emr@nationalgrid.com.

Message from System Operator

TEST MESSAGE

With the start of the new Capacity Market delivery year on 01 October 2017, this is a test of the Capacity Market Notice (CMN) website e-mail and text alert process.

We have manually issued this 'Message from System Operator' to test the email and text alert notification process based on the selections you made when subscribing to the website.

If you did not receive the expected email or text alert notification, please review your account settings by using the 'My Subscription' functionality on this website (top right of page).  If you have any further queries please contact National Grid directly at emr@nationalgrid.com.

Message from System Operator

The Capacity Market Notice cancellation communicated on this website at 3:08pm was issued incorrectly. National Grid is investigating. There is currently no active Capacity Market Notice in place, nor is there an electricity margin challenge at this time.

Electricity Capacity Market Notice Cancelled

The Capacity Market Notice originally active from has been cancelled from 7:30pm on Tuesday 20th June 2017

Electricity Capacity Market Notice Cancelled

The Capacity Market Notice originally active from has been cancelled from 4:30pm on Monday 7th November 2016

Electricity Capacity Market Notice Currently Active

Commencement time of notice
Circumstances that triggered notice
Margin below threshold set out in Capacity Market Rules
Transmission Demand and Operating Margin (MW)
48,265
Aggregate Capacity of BM Units expected (MW)
48,178
Additional Capacity (MW)
No definitive information regarding aditional capacity is currently available to the System Operator.

Capacity Market participants are advised to review the System Warnings page on BMRS for potential additional operational warnings from the System Operator. This notice is published pursuant to Rule 11.3.5 of the Capacity Market Rules

Electricity Capacity Market Notice Cancelled

The Capacity Market Notice originally active from has been cancelled from 7:00pm on Monday 31st October 2016

Electricity Capacity Market Notice Currently Active

Commencement time of notice
Circumstances that triggered notice
Margin below threshold set out in Capacity Market Rules
Transmission Demand and Operating Margin (MW)
44,263
Aggregate Capacity of BM Units expected (MW)
44,487
Additional Capacity (MW)
No definitive information regarding aditional capacity is currently available to the System Operator.

Capacity Market participants are advised to review the System Warnings page on BMRS for potential additional operational warnings from the System Operator. This notice is published pursuant to Rule 11.3.5 of the Capacity Market Rules

Message from System Operator

This site is now fully active.  Capacity Market Notices will be issued, as appropriate, from this time onwards on this site. Please subscribe to our alert service to receive your Capacity Market Notices email and SMS (text) alerts.