Upcoming system outages – Tuesday 11th August 2026 (CHG0056761) & Tuesday 18th August 2026 (CHG0056768)

Please be aware that there will be the following upcoming system outages taking place on Tuesday 11th August 2026 (between 16:00– 19:15) and again on Tuesday 18th August 2026 (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.