Orifice plate meter error resolution – cash flows User Type Meter Error period (Mar 07 – Jul 09) Reconciliation Period 2010/11 2010/11 H2 charges* Shrinkage Provider Shrinkage gas over-procured Refund as a consequence of LDZ Reconciliation Impact – lower Allowed Revenue leads to lower charges SSP Portfolio Users within affected LDZ Increase in Transportation Income and collection may lead to Lower commodity charges LDZ Reconciliation of Transportation and Energy Charges based on SSP portfolio NTS - LDZ orifice plate meters Under billed All Shipper Users Lower overall commodity charge Refund as a consequence of NTS DC/ Interconnector Reconciliation Shrinkage Provider Impact – lower Allowed Revenue leads to lower charges Shrinkage gas over- procured Increase in Transportation Income and collection may lead to Lower commodity charges Relevant User/s (Direct Connect) NTS - Direct Connect / Interconnector Orifice plate meters Reconciliation of Energy and Transportation Charges Under billed All Shipper Users Lower overall commodity charge * subject to successful resolution of errors by July 2010 in time for charge setting notice periods