| 28S20177 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| 53FA1266 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| A219 | K7766 | BRITISH STANDARDS INSTITUTION |
| A219-C24 | K7766 | BRITISH STANDARDS INSTITUTION |
| A219C24 | K7766 | BRITISH STANDARDS INSTITUTION |
| 694722 | U1278 | MINISTRY OF DEFENCE NAVY |
| UWEC3710-2201TEM15 | K1806 | MINISTRY OF DEFENCE, DE&S UNDERWATER AND ELECTRONIC WARFARE PT (UEW IPT) |
| C24 | K7766 | BRITISH STANDARDS INSTITUTION |