| Company | Timeline | Status | |
| Royston Marine Limited Secretary • Unreported | 31 Aug 1991←2 Years 7 Months→26 Apr 1994 | Active | |
| Royston Marine Sales Limited Secretary • Unreported | 31 Aug 1991←2 Years 7 Months→26 Apr 1994 | Active | |
| Royston Marine Engineering Limited Secretary • Unreported | 31 Aug 1991←2 Years 7 Months→26 Apr 1994 | Active | |
| Royston Limited Secretary • Unreported | 1 Aug 1991←2 Years 8 Months→26 Apr 1994 | Active | |
