We issue these notices and warnings to provide information about risks to the end-of-day NTS physical system balance. National Grid NTS has three categories of gas balancing information:
GBN issue; and
The notices and warnings replaced the prevailing gas balancing alert (GBA) arrangements in December 2012 and Gas Deficit Warning (GDW) in October 2019 following approval of UNC modifications 0415 and 0685 respectively.
We issue all gas balancing information site on our website, through the Prevailing View page under the 'System Status' header.
If a GBN is issued or withdrawn, ANS messages will be distributed to authorised users registered with the service. The message will also be available within the ANS message area of the Prevailing View page.
We also offer a text and email notification service to provide updates on the GBN. Please provide your details via the link on the registration page for the free subscription service or login to manage your subscriptions.