| 4C3547 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| 53-62 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| G05205-508DS | K0349 | M L AVIATION LTD INCORPORATING M L WALLOP DEFENCE SYSTEMS LTD |
| BS1768 | K7766 | BRITISH STANDARDS INSTITUTION |
| G05205-508DS | U1918 | MISSION SYSTEMS WIMBORNE LIMITED |