| 28N17203 | U1278 | MINISTRY OF DEFENCE NAVY |
| 28N17203 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| C | K7766 | BRITISH STANDARDS INSTITUTION |
| SP121 | K7766 | BRITISH STANDARDS INSTITUTION |
| SP121-C | K7766 | BRITISH STANDARDS INSTITUTION |
| SP121C | K7766 | BRITISH STANDARDS INSTITUTION |
| SSN07/W/570/00/A34SHEET 5 ITEM 4 | K6451 | BAE SYSTEMS MARINE LIMITED |