Our response to coronavirus

Find out how we're working to keep the electricity and gas flowing reliably throughout the outbreak.

Our RIIO-T1 performance

Here you can find out about how we performed against our previous business plans, including reliability, the environment, customer satisfaction, customer connections and, most importantly, safety.

How we performed against our previous business plans

Our performance outputs under our previous 'T1' business plans were set by a stakeholder consultation process at the start of the RIIO-T1 price control period

£2.9 billion saving

 We met all our T1 targets, while saving £2.9 billion in the process. We did this by working more efficiently, more productively and using our asset management expertise when working on projects. We share these savings with consumers, which means that over £1.5 billion will not be passed on to household consumers’ bills.

Our allowances were adjusted downwards by £2.6 billion

As well as the cost reductions that we have made, allowances have changed from those set at the start of RIIO-T1 in 2013. This is a mixture of reductions (£3.4 billion) where work forecast, like connecting customers, hasn’t been required. Those allowances are returned, so consumers don’t pay more than they need to. This reduction is balanced with additional allowances of £0.8 billion for work that wasn’t certain at the start of the period. Funding for the new overhead line between Hinkley and Seabank is an example of this.

Contact us

We welcome your feedback, so we can make sure we’re improving in the areas that are important to you. You can email us at [email protected]

 

Our results

During RIIO-T1, we forecast our allowances to be £12.8 billion to achieve the outputs we’d agreed. These outputs are categorised as:

  • providing a safe energy network
  • ensuring long-term reliability and availability
  • managing our environmental impact
  • achieving high levels of stakeholder and customer satisfaction
  • connecting customers quickly and efficiently

Our yearly results against these categories are shown below.

Our performance summary

We publish a summary of our performance so that we can explain how we have performed to our customers, stakeholders and end consumers. We hope that you find it useful and we welcome your feedback on how we can improve our report in the future.

Performance summary documents

You can read or download our performance summary documents by clicking on the relevant link below. Our final T1 report will be published in September 2021.

2020/2021

Regulatory Financial Performance Reporting 2021 NGET (TO)

Regulatory Financial Performance Reporting 2021 NGET (TO) Narrative

Stakeholder Performance Report 2021

2019/2020

Regulatory Financial Performance Reporting 2020 NGET (TO)

Regulatory Financial Performance Reporting 2020 NGET (TO) Narrative

NGET stakeholder performance report 2019/20

2018/2019

Regulatory Financial Performance Reporting 2018-19 NGET (TO)

Regulatory Financial Performance Reporting 2018-19 NGET (TO) Narrative

NGET stakeholder performance report 2018/19

2017/2018

Electricity_Performance_Report_2017-18.pdf 

2016/2017

201617_Our_Performance_NGET.pdf

2015/2016

For the full report: NGET_Our_Performance_report.pdf

To watch a short video about our performance in Electricity Transmission click on electricity_animation

For a 1-page summary: NGET_InfoGraphic.pdf

For forecasts of expenditure, allowances, and incentive information: NGET_Data_Tables.pdf

NGET_Our_Performance_printversion.pdf

2014/2015

NG Electricity Transmission - Our Performance Publication 2014/2015 (Online version)

NG Electricity Transmission - Our Performance Publication 2014/2015 (Printable version)

NG Electricity Transmission - Data Tables 2014/2015

2013/2014

NG Electricity Transmission - Our Performance Publication (13/14)

NG Electricity Transmission - Detailed Performance Scorecard (13/14) 

Safety: providing a safe energy network

This continues to be our number one priority. We are proud to report that our injury frequency rate has remained low for 2020/21 at 0.07 (averaging 0.1 over the T1 period) which is world class performance.

Reliability: delivering long-term reliability, minimising the number and duration of interruptions

Reliability is one of our stakeholders’ top priorities.We are committed to delivering a reliable network and have consistently exceeded our reliability targets over the RIIO-T1 period, concluding with 0MWh of ‘Energy Not Supplied’ in 2020/21.  Our 8-year average is 32.64MWh against a target of 316MWh which equates to an 8-year network reliability of 99.99995%.   We have also continued to invest in the network for the benefit of future consumers and customers, exceeding [SG1] [SN2] our overall network risk target to maintain longer-term system reliability.

Environmental impact: playing our role in achieving broader environmental objectives

Emissions

Our overall business carbon footprint has fallen since the beginning of the RIIO-T1 period. We have achieved a group reduction of 68% against our 1990 baseline. In the longer-term we have targets to reduce our greenhouse gas emissions by 90% by 2040 and to net-zero by 2050.This is mainly as a result of reducing emissions that result from energy losses from our transmission lines and from reducing the leakage of SF6 (more details below). The carbon intensity of our network has fallen due to increased renewable generation.

 

SF6

Sulphur hexafluoride (SF6) is an extremely effective electrical insulator and has significant advantages over alternative materials. It is non-flammable, a critical requirement in the high voltage applications for which we use it. However, SF6 is also a very potent greenhouse gas.  As a responsible business, we continue to investigate and develop new ways to manage and reduce the impact of our network, business activities and operations on the environment. We are exploring new initiatives and SF6 alternatives (e.g. we use a blend of SF6 and N2 for Gas Insulated Lines on two sites) and leakage capture techniques..

 

2013/14

2014/15

2015/16

2016/17

2017/18

2018/19

2019/20

2020/21

SF6 emissions (kg)

10,110

9,544

9,744

11,000

9,617

12,270

12,464

11,700

Agreed target (kg)

12,034

12,139

12,302

12,353

12,461

12,474

12,437

12,412

 

Customer and stakeholder satisfaction

Throughout RIIO-T1 we were measured on customer and stakeholder satisfaction through independent surveys. Our incentive/penalty limits were +/- 1% of our annual allowed revenue. Our satisfaction scores exceeded Ofgem’s targets each year.

In our final year of RIIO-T1, we were proud to have successfully continued our performance improvement, ending the period with a customer satisfaction score of 8.39, which increased from 8.21 the previous year and was 0.98 points up from our score of 7.41 at the start of the RIIO-T1 period. This improvement reflects our continued focus to understand our customers and improve the experience we provide. Our stakeholder satisfaction score also increased, from 8.64 in 2019/20 to 8.85 in 2020/21, ending the RIIO-T1 period over 1.3 points up from our initial score of 7.53 in 2013/14. Both customer and stakeholder satisfaction ended the period at their highest ever levels.

 

2013/14

2014/15

2015/16

2016/17

2017/18

2018/19

2019/20

2020/21

Customer survey target

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

Customer survey score

7.41

7.4

7.54

7.4

7.74

7.92

8.21

8.39

Stakeholder survey target

NA

NA

NA

7.4

7.4

7.4

7.4

7.4

Stakeholder survey score

7.53

7.74

7.53

7.66

7.88

7.92

8.64

8.85

 

Stakeholder engagement incentive scheme
Connecting customers quickly and efficiently

We’ve worked hard with our customers to improve our connections process. We’ve reduced the time it takes to offer a connection agreement from the 90 days required by our licence to 60 days on average during the past 12 months. In some straightforward cases, we’ve cut the time to just one week. 

We’re expecting to connect around 12 gigawatts of mainly low carbon new generation during the period covered by our current business plans.

 

 

Transmission Losses

National Grid Electricity Transmission (NGET) publishes its annual Transmission Losses report for the previous years. This report sets out:

(a) the level of transmission losses from our Transmission System, measured as the difference between the units of electricity metered on entry to our Transmission System and the units of electricity metered on leaving it;

(b) a progress report on the implementation of our strategy including our estimate of the contribution to minimise Transmission Losses on our Transmission System that has occurred as a result;

(c) any changes or revisions we have made to the strategy; and

(d) a description of any calculations we have used to estimate Transmission Losses on our Transmissions System.

Download the Strategy on Transmission Losses

 

Annual Transmission Loss Reports

2019/20 Transmission Losses Report
2018/19 Transmission Losses Report
2017/18 Transmission Losses Report
2015/16 Transmission Losses Report
2014/15 Transmission Losses Report

 

Women in an office with laptops

Stakeholder groups

We work with independent stakeholder user and challenge groups who scrutinise our approach, making sure our business plan will achieve the right outcomes for all our stakeholders including end-consumers

Couple looking online on a tablet

Breaking down your bill

Find out how much of your bill goes towards the cost of running the Electricity Transmission network, and how that cost breaks down.