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Capacity

Latest capacity updates

Important information for participants about the latest capacity auctions.  

Important information for participants about the latest capacity auctions.

02/02/2026

Please note that the 2026 Annual Monthly System Entry Capacity (AMSEC) auction will open on Monday 9th February 2026. It will consist of 4 tranches, which will take place on the following dates:

  • Monday 9th February 2026
  • Thursday 12th February 2026
  • Tuesday 17th February 2026
  • Friday 20th February 2026

Please refer to the 2026 AMSEC invitation letter for further information.

24/09/2025

Please note that the Enduring Annual Exit (flat) capacity (EAFLEC) and Annual NTS (flat) Exit Capacity (AFLEC) auctions have been processed.

Information for these auctions is available on our Data Portal at https://data.nationalgas.com/ 

EAFLEC: For request results (increase & decrease), please see the Enduring Annual Increase/Decrease Application Summary reports.

AFLEC: For auction results, please see the Annual Sold/Unsold Quantity report.

11/07/2025

Please note that the IP Annual Yearly Auction (Capacity period 2025-2040) has now been closed and allocated.

02/07/2025

Please note that the Long Term Exit application window opened on 1st July 2025. This window will consist of:

  • Enduring annual exit (flat) capacity increase (EAFLEC) – for enduring capacity commencing from Y+4 to Y+6
  • Enduring annual exit (flat) capacity decrease (EAFLEC) – allowing users to reduce capacity from Y+1
  • Annual NTS (flat) exit capacity (AFLEC) – for capacity covering Y+1 to Y+3
     

For more information, please refer to our Invitation Letter published on the Joint Office website here: https://www.gasgovernance.co.uk/annualauctions/2025

27/05/2025

The next Gemini Code Contingency and OCM Contingency exercise (Exercise Capricorn) will take place on Wednesday 18th June 2025. The exercise pack has been published on the Joint Office website and the link to where this can be found is here. This includes all the details of the exercise and copies of the proformas that you will be obligated to complete and send to us should Gemini and OCM be unavailable in a real contingency, you will need to download the exercise pack to access the proformas. This exercise is a great opportunity to get familiar with the process and what will be expected of you. 

Please ensure you register to take part by the 6th June by contacting [email protected]

10/03/2025

Please note that the 2025 Quarterly System Entry Capacity (QSEC) Auction Allocation Results have now been published.

The allocation results of the auction can be viewed here.

04/03/2025

Please note that we have now issued an Early Closure Letter for QSEC 2025.

04/03/2025

Please note that the Interim Bid Window 2 has now closed for the 2025 Quarterly System Entry Capacity (QSEC) auction.

The results of the auction can be viewed here.

03/03/2025

Please note that the Interim Bid Window 1 has now closed for the 2025 Quarterly System Entry Capacity (QSEC) auction.

The results of the auction can be viewed here.

24/02/2025

Please note that the 2025 Quarterly System Entry Capacity (QSEC) auction will open on Monday 3rd March 2025 at 08:00.

For more information, please view our QSEC Presentation pack. The auction invitation can be located on the Joint Office website.

21/02/2025

Please note that the 2025 Annual Monthly System Entry Capacity (AMSEC) auction has now officially closed.

The results for all four tranches can be viewed by clicking here