1. 2009 Annual Interruption Invitation Gas Customer Forum - 27th of March Steven Vallender and Jonathan Dennett

2. 2 Agenda  2008 interruption tender process and outcome  2009 indicative requirements (including Ad-Hoc for 2011/12)  Tender design  Key dates  Industry engagement questions  Further information

3. 3 2008 Interruption Tender Process and Outcome June tender  48 bids received for 29 supply points across 18 locations  Bids accepted for 5 supply points in 4 locations EA – Fakenham NW – Barrow HP NW – Barrowford HP NW – Winsford HP October ad-hoc tender  22 bids received for 9 supply points across 8 locations  Bids accepted for 2 Supply points in 2 locations EM – Scunthorpe NW – Barrow HP 2008 results summary…  A total of 70 bids tendered  7 bids accepted  Majority of rejected bids too expensive relative to alternative costs

4. 4 2009 Adhoc Requirement for 2011/12 Note: We are likely to support UNC Mod 247. If this Mod is approved prior to the 1 st of May 09 these requirements will not be defined as Ad-Hoc and will instead be progressed as per our normal 2009 Interruption Requirements.

5. 5 Indicative Interruption Requirement – EA and EM Note: If we don’t get successful bids for Barnsley, Burton and Lincoln in respect of 2011/12 we will probably reinforce our system prior to 2012/13. This means that the requirements listed for these locations are conditional on the acceptance of appropriate bids in respect of the earlier year.

6. 6 Indicative Interruption Requirement – NW and > 7bar

7. 7 Tender Design  Maximum number of offers per traunch / supply point = 10  If tranches, must be able to accept one offer per tranche  All contracts start in Year 1 (1 Oct 2012)  If offers for multiple years then must be same for each year  Interruptible allowances in multiples of 5 days SPIDTrancheSOQSHQPrice Days of Interruption e.g. Contract Period OptionEx.5101512345

8. 8 Key Dates

9. 9 Industry engagement questions Customer engagement  Through shipper or direct with customer? Customer seminars  Are they effective?  Are there things we could do better?

10. 10 Further information Further information is available on National Grid Website http://www.nationalgrid.com/uk/Gas/OperationalInfo/interruptionstosupply/DnInterruptionReform/ Joint Office Website http://www.gasgovernance.com/industryinfo/int/ National Grid Contacts Steven.Vallender@uk.ngrid.com Jonathan.Dennett@uk.ngrid.com Andy.Clasper@uk.ngrid.com