| 28Y6071 | U1278 | MINISTRY OF DEFENCE NAVY |
| 28Y6071 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| D | K7766 | BRITISH STANDARDS INSTITUTION |
| SP67 | K7766 | BRITISH STANDARDS INSTITUTION |
| SP67-D | K7766 | BRITISH STANDARDS INSTITUTION |
| SP67D | K7766 | BRITISH STANDARDS INSTITUTION |