Expenditure vs allowance: Electricity transmission (RIIO-T1)

Chart

Javascript is required to render chart Expenditure vs allowance: Electricity transmission (RIIO-T1).

Source: RIIO electricity transmission annual report 2017-18.

Information correct as of: March 2019

This chart is an indicator of financial performance. It compares electricity transmission owners’ realised total expenditure for their regulated business activities against their allowance for each year of the RIIO-T1 network price control.

We update this chart on an annual basis. Click the ‘more information’ tab above for a summary of the latest trends, details of how to interpret the figures and for information on methodology.

Policy Areas:

  • Electricity - transmission

Data Table

Expenditure vs allowance: Electricity transmission (RIIO-T1)
Network companiesYear 1 expenditureYear 1 allowanceYear 2 expenditureYear 2 allowanceYear 3 expenditureYear 3 allowanceYear 4 expenditureYear 4 allowanceYear 5 expenditureYear 5 allowance
National Grid Electricity Transmission (TO only)1.52.11.21.71.21.51.21.31.11.3
Scottish Power Transmission0.30.40.30.50.40.40.40.20.20.3
Scottish Hydro Electricity Transmission0.20.10.40.30.60.40.50.40.40.4

More information

Expenditure vs allowance: At-a-glance summary

  • National Grid Electricity Transmission (TO only) and Scottish Power Transmission both report total expenditure below the annual revenue allowance in 2017-18. National Grid Electricity Transmission reported an underspend of £0.2 billion (14%) and Scottish Power Transmission reported an underspend of £0.1 billion
  • Scottish Hydro Electricity Transmission report total expenditure in line with revenue allowance in 2017-18. 

Relevance and further information

  • This chart is an indicator of company financial performance against cost allowances for the first four years of RIIO-T1.
  • We set the total amount each company can spend ahead of the price control (company ‘allowances’) and monitor their actual spend (‘total expenditure’) against these amounts annually.
  • Network companies are allowed to retain a part of any savings achieved, with the rest being passed on to consumers.

Methodology

Each year, network companies must report on their performance under the RIIO-T1 price control. Our review of their submissions and supporting information informs our annual publications on network company performance.

Date correct
March 2019
Policy area