Gemini Code Contingency Testing – Exercise Star

Background Code Contingency Guidelines Document contains procedures with clear responsibilities on Shippers, National Grid and Xoserve in the event of a failure of the Gemini System. http://www.gasgovernance.co.uk/OtherDocs Guidelines state procedures to be tested at least every 2 years. Xoserve is co-ordinating the Test Programme for the first planned test exercise to take place in September 2010. Notice of this test has been given via UK Link Committee http://www.gasgovernance.co.uk/uklc/130510 100% Participation of all shippers is expected.

Details Name: Exercise Star Date: 8th September 2010 Test Areas: Energy Balancing GE01 – Nominations & Trade nominations (EOD Noms) GE01 – Enhanced operations (DM Nominations) Market Operator nominations Entry Capacity GC04 – Short Term Entry Capacity – WDDSEC GC04 – Short Term Entry Capacity – DISEC GC06 – Entry Capacity Trading – within day trades only Participants: All Shippers; Shippers Agents (if appropriate) APX (Market Operator) National Grid Transmission Xoserve Tools: ANS, Telephone, Fax, Email Communications, Joint Office Website

Contact Details A document pack containing all details of Exercise Star will be made available on the Joint Office website prior to the Exercise. http://www.gasgovernance.co.uk/OtherDocs All communications will be pre-fixed ‘Exercise Star’. A feedback questionnaire will be available after the Exercise for all Shippers to complete. Questions/queries: Gasoperations.shipperliaison@uk.ngrid.com or National Grid 01926 654180 (Nav Dosanjh) or 01926 654043 (Nicola Forrest) Xoserve uklink@xoserve.com