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Steve Edwards & Simon Trivella – 19 th August 2008 Ofgem, Millbank

This document provides an update on the interruption capacity requirements for the DN Interruption program. It includes the results from the June 2008 annual invitation, LDZ aggregated and disaggregated capacity, and the upcoming October 2008 ad-hoc invitation. The document also covers location zones, indicative requirements, process, and timescales. All information is available on the Joint Office and WWU websites.

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Steve Edwards & Simon Trivella – 19 th August 2008 Ofgem, Millbank

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  1. DN Interruption 2008 – Annual Results and Indicative ad-hoc Invitation Interruptible Capacity Requirements Steve Edwards & Simon Trivella – 19th August 2008 Ofgem, Millbank

  2. DN Interruption Update • Results from June 2008 Annual Invitation • LDZ Aggregated Capacity • LDZ Disaggregated Capacity • October 2008 ad-hoc Interruption Invitation • Location Zones • Indicative Requirements • Process & Timescales • All information published on both Joint Office and WWU websites

  3. June 2008 Results Summary

  4. June 2008 Results Summary

  5. October 2008 ad-hoc Invitation • Retaining Zone definition used in June 2008 Annual Invitation • Interruptible Capacity Requirements in 7 out of 10 Zones • No requirement for 2011/12 in: • Dowlais (GT5082002) • Northern (GT5083001) • Aylesbeare (GT5083003) • Indicative Interruptible Capacity Requirements • 5 year requirement in all 7 Zones (2011/12 to 2015/16) • Requirements finalised in ad-hoc Invitation on 8th September 2008

  6. Indicative Requirements – Wales North IP

  7. Indicative Requirements – Wales North

  8. Indicative Requirements – Dyffryn Clydach

  9. Indicative Requirements – Nantgarw

  10. Indicative Requirements – Gilwern

  11. Indicative Requirements – Central

  12. Indicative Requirements – Southern

  13. October 2008 ad-hoc Invitation • Process • Existing UK Link functionality • Timescales / Key Dates • Provisional Eligibility files issued to Shippers / Transporters 4th August 2008 • Ad-hoc Invitation issued 8th September 2008 • Publication of Requirements & eligible supply point locations • Ad-hoc Invitation Dates (10 consecutive Days) • Monday 13th October 2008 to Friday 24th October 2008 • Results and Reports to be issued no later than 21st November 2008

  14. October 2008 ad-hoc Invitation

  15. DN Interruption 2008 – Annual Results and Indicative ad-hoc Invitation Interruptible Capacity Requirements Steve Edwards & Simon Trivella – 19th August 2008 Ofgem, Millbank

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