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Market, operations, and data

These pages contain information for users of the National Transmission System (NTS). Here you will find out how we balance the NTS, the latest operational data and real time flow data, maintenance plans, information about gas quality, and entry and exit capacity details and reports.


How we handle entry and exit capacity, including how to bid for entry capacity and apply for exit capacity, as well as current and historical capacity data.

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Constraint management

How we manage gas constraint actions and materials to help you understand localised system management.

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Transmission operational data

Data for industry analysts including operational data to reduce market uncertainty, ensure equal access to information, and increase information transparency.

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Essential undertaking as part of our role to keep the National Transmission System (NTS) safe, fit for purpose and operating efficiently and economically.

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Operational news

Latest news and announcements relating to gas operational data, including data changes, outages, and discrepancies.

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Gas operational forum

Regular meetings with gas customers to discuss the operation and performance of the Network Code energy balancing and capacity systems.

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How we regulate gas quality in the National Transmission System (NTS) as a safety measure, including details on gas contents and components.

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Calorific value (CV)

How the calorific value (CV) of gas is calculated and how we determine the amount of energy transported by shippers and suppliers, which is used to bill gas consumers.

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Gas operational news alerts

You can subscribe to receive free email updates on operational news.

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