| Company | Timeline | Status | |
| Calvert Holding Company Limited Director • Director | 20 Aug 2004←21 Years→Current | Active | |
| Cliff House Garage Limited Director • Company Director | 20 Jun 1991←31 Years→14 Feb 2023 | Dissolved | |
| John Calvert (Electrical) Limited Director • Company Director | 20 Jun 1991←34 Years→Current | Active | |
