1. Revised Tender Timescale for DN Interruption Arrangements
Transmission Workstream
6th September 2007

2. Background Mod 0090 – Revised DN Interruption Arrangements
Ofgem decision 15 March 2007
Implementation Date 1 April 2008
New regime significantly different from existing regime
DNs determine interruption requirements three years ahead (e.g. Feb 2008 for 2011 onwards)
DNs publish interruption requirements (May 2008)
Users value interruption - bid into DN tender process
DNs select bids (offers) based on interruption requirements
Successful Users receive payment for being interruptible
Transition Arrangements in place to 2011 (based on existing arrangements)

3. Present Timescales Mar Apr May Jun Jul Aug Sep Oct Site Eligibility
Notification
Apply for
NTS capacity
Tender
Opens
Tender
Closes
NTS capacity
results
Publish
Requirements
Notify
Results
Issue: Present timescales allow only short amount of time to conduct analysis on interruption bids and analyse and apply for NTS Exit Capacity

4. Draft Mod Proposal Timescales
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Tender
Opens
Tender
Closes
Apply for
NTS capacity
Site
Eligibility
Notification
NTS capacity
results
Notify
Results
Publish
Requirements

5. Customer Concerns Distribution w/s 23/08/07
Revised timescales overlap with April customer contract renewal process
Squeezed shipper timeframes for shipper system testing, comms with consumers etc
NTS able to move NTS Exit booking window ?
No !

6. Possible way forward Mar Apr May Jun Jul Aug Sep Oct Tender Opens
Closes
Apply for
NTS capacity
Site
Eligibility
Notification
NTS capacity
results
Publish
Requirements
Notify
Results
Retain tender timescales – move notification of results to end July

7. Proposed Mod Timescales
Discuss at Workstreams
Distribution Aug 07
Transmission 6 Sept 07
Mod Panel Sept 07
DMR
Issued Sept 07
Close-out 18 Oct 07
FMR Nov 07
Ofgem Decision 1 Dec 07