| 12 September 2008 DN interruption reform and shipper participation A letter from Ofgem | 104.49 KB |
| 08 September 2008 Interruption Requirement National Grid Distribution | 44.88 KB |
| 08 September 2008 Interruption Requirement Northern Gas Networks | 120.04 KB |
| 08 September 2008 Interruption Requirement Scotia Gas Networks | 253.62 KB |
| 08 September 2008 Interruption Requirement Wales & West Utilities | 1 MB |