30th November 2007 Beverley Grubb SGN Gas Consumers Forum 30th November 2007 Beverley Grubb SGN

Interruptible Capacity Methodology UNC Obligation – UNC TPD G 6.2 (d) Each DN is required to establish an Interruptible Capacity Methodology setting out: - basis on which zones will be defined - financial terms on which offers may be made - basis on which offers will be ranked for selection The Summary page highlights the most important aspects of Revised DN Interruption. The Interruption Capacity Methodology Statement provides detailed information on the process together with the methodology which Scotia Gas Networks will adopt when assessing bids for Interruption capacity. The Interruption Zones page provides details of the geographic zones within which Scotia Gas Networks are considering offering interruptible capacity together with individual requirements for each zone. Are You Eligible ? provides an opportunity for shippers and consumers to check whether their site will be eligible to apply for interruptible capacity. The Other Related Links page provides links to other web sites associated with Interruption Reform.

Interruptible Capacity Methodology - number of days in an Interruptible Period which may comprise an Interruptible Allowance basis on which Minimum Interruptible Amounts will be determined - any other matters

Interruptible Capacity Methodology Ofgem keen it is developed as a joint document. Issued by the Joint Office as a discussion paper on 19th July. Response due by 20th December. Copy available on Joint Office website.

Interruptible Capacity Methodology General guidance and description of interruption arrangements. Details relating to: - Interruption Invitation - Interruption Offer - Evaluation of Interruption Offers - Acceptance of Interruption Offers - Notification of Unsuccessful Offers - Publication of Information