| Company | Timeline | Status | |
| Royston Marine Limited Director • Engineer | 31 Aug 1991←2 Years 7 Months→26 Apr 1994 | Active | |
| Royston Marine Sales Limited Director • Engineer | 31 Aug 1991←2 Years 7 Months→26 Apr 1994 | Active | |
| Royston Marine Engineering Limited Director • Engineer | 31 Aug 1991←2 Years 7 Months→26 Apr 1994 | Active | |
| Royston Limited Director • Engineer | 1 Aug 1991←2 Years 8 Months→26 Apr 1994 | Active | |
| Royston Marine Engineering Limited Director • Unreported | 1 Jan 1970←24 Years→26 Apr 1994 | Active | |
