Customer interruptions and minutes lost: Electricity distribution (RIIO-ED1)

Chart

Source: RIIO Electricity Distribution annual report 2017-18.

Information correct as of: March 2019

This chart is an indicator of the reliability and availability of the electricity distribution network. It shows the number of interruptions experienced by customers and the average length of interruptions.

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 - distribution

Data Table

Customer interruptions and minutes lost: Electricity distribution (RIIO-ED1)
Target for customers interruptedActual number of customers interrupted Target average minutes lost per customer per year Actual average minutes lost per customer per year
Electricity North West47.4533.2344.2334.63
Northern Powergrid64.3249.9761.0340.51
Western Power Distribution62.1753.2742.1731.57
UK Power Networks53.1236.4745.8032.03
SP Energy Networks44.6235.9043.5832.09
Scottish and Southern Electricity Networks65.2756.2455.1451.40

More information

Customer interruptions and minutes lost: At-a-glance summary

  • Network operators continue to perform well and exceed their overall targets for 2017-18, however a number of network operators missed individual elements of the targets. SWEST missed its overall CI target resulting in a penalty.
  • Customer interruptions were lowest for Electricity Northwest Ltd and highest for Scottish and Southern Electricity Networks.
  • Customer minutes lost were lowest for Western Power Distribution and highest for Scottish and Southern Electricity Networks.

Relevance and further information

  • Distribution network operators invest in their network to increase reliability and resilience against severe weather and to protect the network from the effects of climate change.
  • We incentivise distribution network operators to improve the reliability on their network, penalising underperformance and rewarding those who beat their targets.

Methodology

We set annual targets for customer interruptions and customer minutes lost.  Each year distribution network operators must report on their performance under the RIIO-ED1 price control. This allows us to assess if targets have been met and to reward or penalise network operators appropriately. 

Date correct
March 2019
Policy area