CMP355 & CMP356 'Updating the Indexation methodology used in TNUoS and Transmission Connection Asset charges for RIIO2 (CMP355) & Definition changes for CMP355 (CMP356)'

Currently, Section 14 of CUSC uses the Retail Price Index (RPI) as the measure for index-linking various parts of the charging methodologies. With the RIIO2 Final Decision from Ofgem, the RPI measure of indexation has being replaced and so the CUSC needs to be revised accordingly to use the correct measure for setting TNUoS and Transmission Connection Asset (TCA) charges.