Suppliers
Welcome to the NESO supplier portal where you’ll be able to register your interest to work with us and find useful tools and information. In this portal you can manage aspects of your supplier account with us.
On behalf of NESO, we would like to extend a warm welcome to all existing and potential suppliers. It is our pleasure to introduce you to our organisation and the opportunities that lie ahead for collaboration and partnership.
NESO procurement is a business-centric function, enabling clean power strategy for GB. We firmly believe that strong supplier relationships are the foundation of our success. We recognise the crucial role that our suppliers play in creating value, driving innovation and delivering operational excellence.
Partner with us
As a potential supplier, we understand that you may have questions or require assistance during the onboarding process. We are committed to fair and transparent procurement practices, and we value open communication and collaboration with our suppliers.
By partnering with NESO, you will have the opportunity to work with a progressive procurement organisation that is committed to sustainable and responsible business practices. We strive to create long-term partnerships that are built on trust, integrity, and shared success. Together, we can drive positive change and deliver exceptional value to our business partners.
Key information
Code of conduct covers all the policies and will be reviewed to include transparency by default, publishing to the central digital platform.
Although from 1 October 2024 our name will change from ‘ESO’ to ‘NESO’, we will remain legally the same corporate entity and our company number registered at Companies House will remain unchanged (11014226). Any contracts and orders entered into with us remain in full force and effect.
However, in cases where contracts specifically include contact details for formal communications or notices under the contracts:
- From 1 October 2024 any contact address 'National Grid Electricity System Operator Limited, 1 – 3 Strand, London WC2N 5EH' (or similar) shall be updated to 'National Energy System Operator Limited, St Catherines Lodge, Bearwood Road, Sindlesham, Nr Wokingham, Berkshire, RG41 5BN'; and
- From 1 November 2024, the e-mail addresses for notices '@nationalgrideso.com' and / or '@nationalgrid.com' shall in each case be replaced with '@nationalenergyso.com'
- All individual contact names will remain the same unless notified otherwise. If any contracts contain email addresses associated with individuals, they will change to ‘@nationalenergyso.com’
Any further changes to notice provisions in any particular contract that may be necessary arising from our change to NESO will be communicated to relevant parties separately.
Highlighted below is the information on the changes that our customers and suppliers will need to be aware of and the action that they will need to take no later than the 1 October 2024.
As of 7 October, invoices you receive will be addressed from NESO.
| Description | Information or Action | |
| Companies House registered name | The registered company name will change on the 1 October 2024 | From 1 October 2024, you should ensure that your records reflect that the new company name is: National Energy System Operator Limited |
| Company Registered Address |
The registered company address will change on 1 October 2024
|
From 1 October the registered address will change to: National Energy System Operator Limited, St Catherines Lodge, Bearwood Road, Sindlesham, Nr Wokingham, Berkshire, RG41 5BN Please ensure that your records reflect this. |
| Companies House Registration number | 11014226 | No change and no action required |
| Correspondence & Invoice Address | National Energy System Operator Limited Faraday House Warwick Technology Park Gallows Hill Warwick CV34 6DA |
The correspondence & invoice address has not changed, with the exception of the company name. You should continue to use this address for sending Purchase Orders |
| VAT Number | The VAT number changed on 1 July 2024 to GB463544189 | Check that you have updated the VAT number in July 2024 or else your invoice will be rejected |
| Company Invoice name | Company invoice name is changing from Electricity System Operator Limited to National Energy System Operator Limited |
As of 1 October, invoices should be addressed to National Energy System Operator Limited
|
| Bank Account details for making payments to National Energy System Operator |
The bank account name will change where currently it shows "NGESO" Bank account numbers & sort code will remain the same |
Please note the change of Bank Account name: “National Energy System Operator Limited.” Check these bank details are not used to make payments to other parts of the National Grid group. NESO will need to return to sender any payments not intended for NESO – they cannot be forwarded to National Grid and if you incorrectly pay National Grid they will be unable to forward payment to NESO. If a payment is received by National Grid, NESO will continue to chase payment and interest may be charged. |
| Purchase Orders | Any purchase orders dated up to 30 September 2024 will be accepted with the company name “Electricity System Operator Limited ” |
All Purchase Orders created from 1 October should use the company name “National Energy System Operator Limited”. Any Purchase Order created prior to 1 October will not be reissued with the National Energy System Operator Limited company name or branding, However in the Coupa portal you will see the new branding. |
| Contact email addresses | Updated contact details from 1 October |
From 1 October, please use: Purchase to pay email address: [email protected] Order to cash email address: [email protected] |
NESO has embarked on an end-to-end Source to Pay transformation journey. Our Coupa e-commerce platform is a key enabler to helping our users purchase goods and services easily from our suppliers. We also recognise the benefits Coupa offers when managing purchase order and invoice transactions between NESO and our suppliers.
Using Coupa
Partnering with NESO will recommend you to join the Coupa Supplier Portal (CSP) in order to:
- receive purchase orders
- submit invoices
- create and maintain your online product catalogues
- view payments.
There is no cost for registering and using the CSP and no additional software is required.
Submitting invoices to NESO
NESO recommends that invoices are created and submitted through the Coupa Supplier Portal.
Learn more about creating invoices in Coupa
Invoice address
Faraday House
Warwick Technology Park
Warwick
CV34 6DA
Please note this change is for administrative purposes only and must not be used to send hard copy invoices. All invoices should be created and submitted through the Coupa Supplier Portal as per the guidance on this page. Please refer here for further details of our registered address.
What to do if your records need updating
If you are currently set up as an existing supplier to NESO and any of your company details have changed (e.g. company name, address, bank details), please email [email protected] with the required changes and we'll update your supplier record.
Documents are coming soon
More information about NESO
About NESO
NESO is at the heart of the transformation to a fully decarbonised electricity system by 2035, while continuing each day to reliably and safely move electricity across Great Britain second-by-second. Find out more information about the National Energy System Operator.
Who we are
NESO will be built upon our previous experience as the Electricity System Operator (ESO). As ESO, we had extensive expertise in balancing electricity supply and demand 24/7 without interruption, whilst making sure the networks we operated and the markets we served were prepared for the future.
What we do
At NESO we bring together 8 key functions required to deliver the plans, markets and operations of the energy system of today and the future. Find out more information about those 8 key areas.