How we're performing

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.

2019/2020

2018/2019

2017/2018

2016/2017

2015/2016

2014/2015

2013/2014

This continues to be our number one priority. We are proud to report that our injury frequency rate (IFR) has continued to improve and for 19/20 was 0.05 (compared to 0.07 in 2018/19) which is world class performance. This is due to the continuing work to deliver strong gains in contractor safety performance. The initiatives in manual handling, driving, and site rules that are underway are contributing to the continued improvement in safety performance.

Reliability – the total energy not supplied in 2019/20 was 54.5MWh. When compared with the incentive neutral point of 316 MWh, this year’s performance was relatively strong, although the total incentivised lost energy was greater than that of 2018/2019 (12.06 MWh).  This result is 83% lower than the neutral point and represents an overall level of network reliability of 99.99997%, which our stakeholders tell us continues to be so important to them. 

We’ve maintained high levels of reliability from our network throughout the duration of RIIO-T1 and are on track to  meet Ofgem's reliability targets.

Emissions

Our overall business carbon footprint has fallen since the beginning of the RIIO-T1 period. This is mainly as a result of reducing emissions that result from energy losses from our transmission lines. 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. And, because of its effectiveness, it takes up less volume than an equivalent insulating volume of an oil alternative.

However, SF6 is also a 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 and capture techniques. These are part of our continued efforts to take care of the environment for current and future generations.

Environmental documents

You can read or download our annual statements by clicking on the relevant link below.

We’re measured on customer and stakeholder satisfaction through independent annual surveys. Our incentive/penalty limits are +/- 1% of our annual allowed revenue. Our satisfaction scores have exceeded Ofgem’s targets each year during our current business plans.

In our first year fully separated from the ESO, we are delighted that we have successfully improved our overall service quality further from previous years and this is reflected in our customer satisfaction ratings, which have significantly increased from 7.92 last year to 8.21 this year. This improvement reflects the focus and hard work across our whole transmission business to both understand and improve the way we provide the experience our customers need. Our stakeholder satisfaction score has also significantly increased from 7.92 in 2018/19 to 8.64, due to our increased focus on stakeholder engagement across our business.

Ofgem’s stakeholder engagement incentive is designed to encourage us to engage effectively with a wide range of our stakeholders and use the outputs from this process to inform how we plan and run our businesses. The incentive limit is +0.5 per cent of our annual allowed revenue and is determined by an independent assessment panel, which Ofgem also attends.
 

Stakeholder engagement incentive documents

You can read or download our stakeholder engagement incentive submission by clicking on the relevant link below.

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.

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