We have taken the decision to continue using RPI as the measure for indexation in TR4.
For interconnectors, whilst we will continue to consider RPI as the default index, we intend to create greater flexibility for developers to propose alternative arrangements, to be assessed alongside all other elements of consumer value when considering cap and floor submissions.
A number of respondents also took the opportunity to share their thinking on indexation in relation to RIIO. Our decision in respect of offshore tender rounds and interconnector submission windows has no implications for our indexation approach for RIIO. Our current RIIO regimes will continue to use RPI during the current control periods. Further information can be found in the decision letter.