FGO: ASA Service Line Review Currently ~290 service lines in GT:Xoserve ASA 190 relate to Uniform Network Code Subject to annual review to amend for UNC Modification changes Currently set out for pre UK Link Programme/Project Nexus arrangements FGO requires realignment of obligations in UNC and corresponding ASA arrangements

FGO: ASA Service Line Review (UNC) UNC Section No of Lines UNC Sections Description Possible Future Responsibility E - Daily Quantities, Imbalances and Reconciliation 10 E10, 6, 7, 8 Mainly related to energy allocation to shippers Primarily shippers G - Supply Points 56 G1, 2, 3, 5, 6, 7 SPA - shipper to shipper activity, and includes use of CMS for all parties H - Demand Estimation and Demand Forecasting 20 H1 Demand estimation sub committee and algorithms J - Exit Requirements 1 J5 SPA for CSEPs - will be superceded by UNC0440 and iGT UNC039 iGTs/Shippers M - Supply Point Metering 19 M3, 4, 5 Metering and meter reads Q - Emergencies 4 Q2, 4 Mainly Shipper obligations to facilitate Transporter activity Transporters S - Invoicing and Payment 15 S1, 2, 4 Mostly transporter invoicing U - UK Link 21 U1-8 Provision of systems & contingency arrangements Shared V - General 11 V2, 3, 4, 5, 9 Mostly transporter credit arrangements & customer lifecycle X - Energy Balancing Credit 32 X1-4 Xoserve manage energy balancing between shippers 190 relate to Uniform Network Code

FGO: ASA Service Line Review (ASA) Post UKLP/Project Nexus alignment required Clear responsibilities for parties required to be set out in UNC UNC responsibilities to align to Xoserve funding and governance Sharing allocations required for truly shared services