| Company | Timeline | Status | |
| Seville Management Limited Director • Unreported | 12 Nov 2004←21 Years→14 Jan 2026 | Active | |
| Sub Surface Laboratories Limited Secretary • Unreported | 27 Feb 1996←24 Years→16 Dec 2020 | Active | |
| Sub Surface North West Limited Secretary • Unreported | 27 Feb 1996←24 Years→16 Dec 2020 | Active | |
| Sub Surface Consultants Limited Secretary • Unreported | 22 Dec 1995←25 Years→16 Dec 2020 | Active | |
| Clifford Marsden Services Limited Director • Certificated Teacher | 21 Dec 1990←35 Years→Current | Active | |
| Sub Surface North East Limited Secretary • Unreported | 21 Dec 1990←30 Years→16 Dec 2020 | Active | |
| Sub Surface Midlands Limited Director • Certificated Teacher | 21 Dec 1990←30 Years→16 Dec 2020 | Active | |
| Sub Surface Limited Director • Certificated Teacher | 21 Dec 1990←30 Years→16 Dec 2020 | Active | |
| Clifford Marsden Services Limited Director • Unreported | 1 Jan 1970←55 Years→17 Dec 2025 | Active | |
