When a transporter identifies a need to invoke interruption, the following steps are taken:-

Transporter informs the Shipper of the need to interrupt

A minimum of five hours notice will be given of the need to stop using gas.

Note: For interconnectors and Storage Sites this notification will be sent via the Agent.

Shippers/suppliers contact their Interruptible Consumers

Once the shippers have received notification from their transporter ( or via Agent), they will, in accordance with their contractual terms, issue notice, to their consumers of the need to interrupt. In exceptional circumstances the transporter may contact the consumer directly, for example where there has been a problem with communication, or in a localised emergency.

• Shippers confirm with the transporter the notice of interruption has been received within 30 minutes of receipt.
• Shippers confirm with the transporter, no later than five hours after the interruption notice has been given, that their consumers have interrupted or that they will interrupt, at or before the time required by the transporter.
• For Emergency interruption the normal 5 hours notice period is waived.

Restoration

As soon as the transporter determines that supplies to interruptible consumers can be restored, shippers will be informed of the exact time their consumers can resume taking gas. Shippers will notify the consumers. During periods of interruption, the transporter will provide shippers with regularly updated information about the continuing need for interruption this is available via:

• The day ahead Likelihood to Interrupt Service on the website.
• If consumers require any information about their interruption status, either during or outside a period when their supplies are interrupted, they should contact their shipper/supplier directly.

Note: Gas consumers should always obtain authorisation to re-commence taking gas after interruption from their supplier or shipper.