GT1 requests

What is a GT1 and do I need to submit one?

A Gas Transporter 1 (GT1) is a test carried out to check the nature of your business gas supply.

If you intend to increase your gas load and you require SGN to check the available capacity and/or pressure of your existing service, you need to complete and submit a GT1 request (below).

Capacity information provided to customers will be for indicative purposes only. It does not confirm the availability of gas and does not reserve any capacity in our network.


GT1 form

The GT1 form is available on the Energy Network Association's (ENA) website, or you can download a copy.

Please email completed forms to


Latest Gas Transporter documents

The latest gas transporter documents can be found on the Energy Networks Association website


Get in contact

If you’d like further information about submitting a GT1 request, please send an email to or call our customer service team on 0800 912 1700 (Monday to Friday between 8am and 8pm, Saturday between 8am and 4pm).