1. Transmission Workstream, 1 Mar 07
Modification Proposal 0134 – “Publication of Nodal NTS Demand Forecasts”
Transmission Workstream, 1 Mar 07

2. Background
Desire to seek to increase transparency of capacity charge setting process by publication of
capacity charging model
data used in model (e.g. nodal annual supply/demand forecasts)
UNC restricts release of nodal demand forecasts to:
LDZ Supply Points, aggregated basis by LDZ
NTS Supply Points, aggregated basis for Total System
Mod 0134 raised to seek to remove such restrictions

3. 0134 Modification Proposal
Remove restrictions to allow publication of nodal annual NTS demand forecasts used to:
set indicative or final capacity charges under the Charging Methodology
determine indicative capacity charges under proposed amendments to the Charging Methodology
Limit to three Gas Years ahead to preserve commercial confidentiality

4. DN Demand Data
Clarification has been sought as to how the DN Demand data required for the Charging Model will relate to the Planning Process
The DN Demand data used for charge setting reflects data utilised for the current Ten Year Statement (TYS), which is in turn based on the current agreed OCS data
Example – Transmission Transportation Charges to be applied from 1 Oct Based on December ’06 TYS, which utilises the Sept 06 OCS data

5. Release of Commercially Sensitive Information
Concerns have been raised that the release of the Nodal Demand Data may have commercial implications
Limit to following three Gas Years i.e. for charges to be applied from 1 Oct 2007, we would only release data for 2007/8, 2008/9 & 2009/10
If proposal GCM 01 (introduction of Transportation Model) vetoed, would need to consider changes to forecast data used within Transcost – currently based on 10 years

6. Workstream Views Does the workstream…
require any further clarifications of the draft proposal?
consider that there are areas that require further development?
support proposal proceeding to consultation?