Amendments to NTS Shrinkage Reporting

Process Nick Reeves

Alignment of NTS & LDZ Shrinkage forecasts

NTS & LDZ Shrinkage forecast periods LDZ – Financial year (1 April to 31 March)

NTS – Gas year (1 October to 30 September)

Proposal seeks to align NTS and LDZ reporting periods by moving annual forecast of NTS Shrinkage to financial year Providing transparency to Users

Easier to report on NTS Shrinkage (SO incentive etc)

Amend UNC Section N 2.2.2 (a) from ‘no later than 1 Sept’ to ‘no later than 1 March’

Clarification Changes (1)

Following an internal review, it has been identified that UNC Section N requires a number of minor clarifications

Ongoing operational process improvements have led to more accurate shrinkage forecast calculations and data being provided to Users

Review Group 140 principles & MIPI Phase 2

Data item/report explorer has amended the way reports are produced – move away from “flat” monthly reports

Clarification Changes (2)

Proposed changes:

NTS currently producing a daily Unaccounted for Gas (UAG) figure as part of the daily estimate of NTS Shrinkage Factor

Need to clarify that Unaccounted for Gas is included within daily estimation of NTS Shrinkage Factor (2.1.1 (a)) and remove 2.1.1 (b)

MIPI changes mean forecast & reporting of month ahead shrinkage factor is out of date/no value

Remove 2.2.2 (b)

Discrepancy in reporting date of average monthly ‘assessed’ shrinkage has been identified

Amend 2.3.2 from ’15th Day’ to ’16th Day’ of following month

Next Steps

Transmission Workstream – 3rd Dec 09

Publish Modification Proposal – 10th December 09

UNC Mod Panel – 17th Dec 09

Consultation & Final Mod Report

UNC Mod Panel – 21st Jan 10

Ofgem approval

Implementation – 1st March 10