ESO is delighted to share that the Day 1 for National Energy System Operator (NESO) will be Tuesday 1 October 2024.
This formal confirmation enables NESO to be established as a new independent organisation responsible for planning Britain’s entire energy system, operating the electricity network and offering expert advice to the sector’s decision-makers. We will bring electricity and gas network planning under one roof, plot the country’s course for clean power and pave the way for lower energy bills.
If you need any support or have any questions on these changes, please contact us on [email protected] or 0800 464 3621 or visit our contact us page.
What this means for you
Our brand-new NESO website - www.NESO.energy will go live at 05:00 on 1 October 2024 and will replace the current website - www.nationalgrideso.com.
Our current website will no longer be used, and will not be accessible post 1 October 2024. We encourage you and your colleagues to explore the new site when it goes live and bookmark it.
Please note, the current website will go under a maintenance page between 17:00 on 30 September to 05:00 on 1 October 2024 to enable the switch.
During the month of October, we will be conducting a phased transition across to our new NESO IT estate. Please see below the change in URLs and APIs and the date of change completion. We encourage you to update any saved URLs or API addresses that you currently use and bookmark the new URLs. As per the change schedule listed below, the applications will go offline from 5:00 PM on the previous day and be back online at 8:00 AM on the date of change completion. For example, Connection Portal (CPP) will be offline from 5:00 AM on 30th Sep and become available from 8:00 AM on 1st Oct.
Please note, from the Date of change, the current URLs and APIs will automatically re-direct to the new URLs and APIs. You may want to check your internal process for whitelisting our new NESO domain – nationalenergyso.com and neso.energy to ensure seamless access to new URLs.
If you need any IT support regarding these changes, please call us on 0800 917 7111.
New application web links:
New API addresses:
During October, our ESO email addresses will be changing to NESO - [email protected].
From 1 October, our new Customer Service email address will change to [email protected] to raise queries with us.
We recommend you visit our new contact us page (from 1 October) to find out more. Our ESO colleagues will be in touch with you to share their new contact details and provide more information.
Please note, from 1 October, any emails sent to old email addresses (@nationalgrid.com or @nationalgrideso.com) will be automatically forwarded to the new email addresses.
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] |
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.
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