On these pages you will find out more about how the National Transmission System (NTS) handles entry and exit capacity, including how to bid for entry capacity and apply for exit capacity. You will also be able to retrieve current and historical capacity data on these pages.

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Entry capacity

This page provides an overview of entry capacity including the types of capacity available, the different types of auctions, and the responsibilities of users and National Grid.

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Exit capacity

This page provides an overview of exit capacity including the types of capacity available, the different types of applications, and the responsibilities of users and ourselves.

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Capacity methodology statements

Gas Transporter Licence capacity methodology statements, associated consultations, documents, and planned industry workshops.

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Latest capacity update

Please be aware that the Entry & Exit Long-Term Summary Report has been updated to include an additional tab for new sites with zero baseline capacity. Please click here for further information relating to the new Entry/Exit Points tab. 

The EAFLEC (Increase and Decrease) and AFLEC windows are all now closed. The AFLEC application will be allocated no later than the 14th August 2019. The EAFLEC allocation will be allocated no later than the 30th September 2019 (subject to any substitution requests) 

Capacity gives shippers the right to flow gas on and off the National Transmission System (NTS), and so capacity is often also referred to as ‘rights’ or ‘entitlements’. A shipper needs to buy one unit of capacity in order to flow one unit of energy on or off the system. This is known as the ‘ticket to ride’ principle. Units for both capacity and energy are in kWh/day.


Gemini contingency arrangements

Here you will find guidance on the Gemini Code contingency arrangements should a failure of the Gemini system occur. The processes detailed on here should only be followed when we have declared a Code contingency.

When contingency arrangements are being used, news updates will be provided via the standard communications channels:

For Gemini training materials and operational processes, please go to the Xoserve website. You can find more about Gemini contingency on the Joint Office Website.

Processes to be followed and proforma to be used in the event of a Gemini Code contingency are located here:

Download the Gemini Code Contingency Guidelines document



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To find out more about charges and how those charges are determined, please refer to the Charging pages.

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