Gemini Restricted Service Notification - Monday 16th June 2025

13/06/25

Please be aware that on Monday 16th June, between the hours of 10:00 and 11:00 British Summer Time, we will be working with our adjacent TSO partners to complete the essential maintenance to renew the Gemini domain certificate. 

We advise you not to place EU nominations during this time as there is a risk that they will not be processed. Please can you take this into account during your operational planning

Upcoming System Outage - Tuesday 24th June 2025

12/06/25

Please be aware that there will be the following upcoming system outage taking place on Tuesday 24th June 2025 (between 16:00– 19:15) which will affect some elements of Operational data displayed through National Gas Data portal. 

Affected GCS data flows to National Gas data portal and GMRS are as follows: 

 MIPI 

• PCLP data (Published via ANS at 17:05 if required).
• Forecast Flows (Supply).
• Physical Flows (Supply).        

 GMRS 

Physical Flows (Supply) - Outage takes last known good value for the duration.