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© 2026 Payment Check Ltd

Registered Address: 3rd Floor Suite 207 Regent Street London W1B 3HH

Made by Alastair Campbell

PAYMENTCHECK
HomeCompany SearchGet Your ScoreAwards
Sectors›Energy›NATIONAL ENERGY SYSTEM OPERATOR LIMITED

NATIONAL ENERGY SYSTEM OPERATOR LIMITED

PaymentCheck Score 2025
88Good
#1416 in UK
#668 in London

Ranked in 2 industries

  • 123rd of 339 in Energy
  • 376th of 717 in Financial Services

This company is listed under more than one industry, so we show its position in each rather than picking one.

Company Information

Company Number
11014226
Registered Address
1-3 Strand, London, WC2N 5EH
Status
Active
Employee Count
1,850
Turnover
£2,904,000,000
EBITDA
-£304,000,000

Additional Details

Website
https://nationalgrid.com
Phone
Company Type
Private limited Company
Incorporated On
16 October 2017
Nature of Business
96090 - Other service activities not elsewhere classified
Industries
Energy, Financial Services
Region
London
Get notified when National Energy System Operator Limited's payment practices change.
Eligible for Certification

Score of 87.54/100 qualifies for PaymentCheck Certification

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Payment dataScore historyFinancialsLocation

Time to Pay

Average Time to Pay
22 days
Shortest Period:3 days
Longest Period:42 days
Max Contractual:42 days

Payment Timeline

Within 30 Days
84%
31-60 Days
15%
After 60 Days
1%
Not Paid Within Terms8%

Payment Features

Participates in Codes✗ No
E-Invoicing✗ No
Supply Chain Finance✗ No

Performance Reports History

Reporting Period Filed: 2026-04-29
Reporting PeriodFiling DateAverage Time to Pay (days)Paid within 30 daysPaid 31-60 daysPaid after 60 daysNot Paid within Terms
01 Oct 2025 - 31 Mar 202629 Apr 20262284%15%1%8%
01 Apr 2025 - 01 Sept 202530 Oct 20252079%19%2%11%
01 Oct 2024 - 31 Mar 202529 Apr 20251878%21%1%9%
01 Apr 2024 - 30 Sept 202421 Nov 20241684%15%1%9%
01 Oct 2023 - 31 Mar 202402 May 20242070%30%0%4%
01 Apr 2023 - 30 Sept 202331 Oct 20232070%29%1%12%
01 Oct 2022 - 31 Mar 202328 Apr 20232172%27%1%25%
01 Apr 2022 - 30 Sept 202227 Oct 20222166%33%1%25%
01 Oct 2021 - 31 Mar 202230 Apr 20222074%25%2%32%
01 Apr 2021 - 30 Sept 202129 Oct 20211679%19%1%31%
01 Oct 2020 - 31 Mar 202129 Apr 20211283%15%2%15%

Invoice Payment Practices

This information is as reported by the business, and responses are in their own words.

Payment Terms

Standard payment terms

30 days

Were there any changes to the standard payment terms in the reporting period?

No information available

Any other information about payment terms

n/a

Maximum contractual payment period agreed

42

Dispute Resolution Process

All disputes raised will be handled by a combination of the dedicated Purchase to Pay team, the Procurement team and the business unit working with the supplier

Other Payment Information

Has this business signed up to a code of conduct or standards on payment practices?

For example, signatories to The Prompt Payment Code must commit to paying 95% of their invoices within 60 days.

❌

Does this business offer e-invoicing in relation to qualifying contracts?

This is where suppliers can electronically submit and track invoices. It's not just allowing suppliers to email them an invoice.

❌

Does this business offer supply chain finance?

This is where a supplier who has submitted an invoice can be paid by a third-party finance provider earlier than the agreed payment date. The business would then pay the finance provider the invoiced sum.

❌

Under its payment practices and policies, can this business deduct sums from payments under qualifying contracts as a charge for remaining on a supplier list?

❌

During the reporting period, did the business deduct sums from payments as a charge for remaining on a supplier list?

No information available

About this company

National Energy System Operator Limited was previously registered as National Grid Electricity System Operator Limited, trading under that name from October 2017 until it was renamed in October 2024. Companies House records list its nature of business under other service activities not classified elsewhere, with associated industries covering energy utilities, energy management, renewable energy and oil and gas. Since October 2024 the company has been majority controlled by the Secretary Of State For Energy Security And Net Zero, having previously been controlled by National Grid Holdings One Plc. The evidence does not describe specific products or services beyond this change of ownership and naming, consistent with a body operating within the UK energy system.

Generated from the company's website and Companies House records. Sources: find-and-update.company-information.service.gov.uk · find-and-update.company-information.service.gov.uk

Financial Metrics

Cash
£63,000,000
Net Worth
£269,000,000
Total Current Assets
£1,297,000,000
Total Current Liabilities
£993,000,000

Company Location

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PaymentCheck

Our mission is to change the culture of late payments in the UK and help save over 55,000 companies every year which close due to cashflow issues.

Services

  • Payment Check
  • Business Solutions
  • API Access
  • Invoice Calculator
  • Late Payment Help
  • Get Your Score
  • Get Certified
  • For Accountants

Company

  • About Us
  • Contact
  • Blog
  • Search Archive
  • Compare
  • EULA
  • Privacy Policy
  • Terms and Conditions

Awards

  • Methodology
  • 2025 Awards
  • 2024 Awards
  • 2023 Awards
  • 2022 Awards
  • 2021 Awards
  • 2020 Awards

Contact

  • office@paymentcheck.co.uk
  • +44 (0) 7915 608 057
  • Send Your Story

© 2026 Payment Check Ltd

Registered Address: 3rd Floor Suite 207 Regent Street London W1B 3HH

Made by Alastair Campbell