Who should apply to connect

Information for our suppliers


Here you will find information for our existing suppliers, along with latest news and updates on our Coupa supplier portal.

Code of conduct

You can download the Supplier Code of Conduct by clicking on the link below.

Download Supplier Code of Conduct


Upcoming Coupa Supplier Portal outages

The supplier portal for National Gas (Coupa) is still linked to that of National Grid plc. In creating the new National Energy System Operator, under the Energy Act 2023, National Grid plc needs to separate a range of systems from the existing Electricity System Operator (ESO) during the summer of 2024. 

As part of this separation work, National Gas will need to temporarily switch off several key systems, including the Coupa Supplier Portal, between 26 April and 20 May. Read on to find out what you need to know. 

How this affects you

During this period, we will not be able to issue purchase orders, process invoices/credit notes or make payments; and you will not be able to submit invoices/credit notes via the Coupa Supplier Portal. Please make sure to submit your invoices for goods and services already provided into the Coupa Supplier Portal as early as possible and resolve any potential disputes.

If you also provide services to ESO, a separate Supplier and Contract Number will be created in these systems for the new National Energy System Operator.

Please check for more updates, and email  [email protected] if you have any queries.