Further information can be found on each DN website at: National Gas Transmission Northern Gas Networks Scotia Gas Networks Wales & West Utilities AUG Information (Post 2017) DN Charges DN Entry/Exit Charging Consultation GSR Reports Measurement Error Reports Metering Validation Reports (Offtake Meter Performance Report) DN Interruption Ad-hoc Interruption Tender Requirements and Results Annual Interruption Tender Requirements and Results 19 August 2008 Interruption Seminar Methodology Consultation Gas Customer Forum Shrinkage Forum Theft of Gas Reports Printer friendly version Related Files File Interruption Calculator (10 March 2008) File DN Interruptible Capacity Methodology Statement (Version 1.0 05 March 2008) File Ofgem letter confirming the Methodology has not been vetoed by the Authority File Ready Reckoner and User Guidelines (provided by Wales & West Utilities) Download All Files Related events Select Meeting Ad-hoc Interruption Tender Requirements and Results Annual Interruption Tender Requirements and Results 19 August 2008 Interruption Seminar Methodology Consultation