| 11A5006 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| A55 | K7766 | BRITISH STANDARDS INSTITUTION |
| A55E4 | K3606 | WALLOP DEFENCE SYSTEMS LTD |
| B | K7766 | BRITISH STANDARDS INSTITUTION |
| A55-B | K7766 | BRITISH STANDARDS INSTITUTION |
| A55B | K7766 | BRITISH STANDARDS INSTITUTION |