RIIO-ET1 Annual Report 2020-21

This report summarises the delivery and financial performance of onshore electricity transmission owner (TO) businesses under the current RIIO price control period (RIIO-ET1) in the following areas:

1. Achievement of annual output targets and performance in 2020-21;
2. Activity under the innovation funding streams in 2020-21;
3. The current level of delivery against baseline outputs in response to changing needs which automatically adjust the cost allowances (known as ‘volume driver’ mechanisms);
4. The TO’s current costs incurred against the total allowance across RIIO-ET1 and the current Rate of Regulatory Return on Equity (RoRE) range.