| BS1806-023 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1806-023NBR.80GR | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-023 | K7766 | BRITISH STANDARDS INSTITUTION |
| MBEU192410 | U1604 | MARTIN-BAKER AIRCRAFT COMPANY LIMITED |
| MBEU270263 | U1604 | MARTIN-BAKER AIRCRAFT COMPANY LIMITED |