| Company | Timeline | Status | |
| Norfolk Prohelp Cic Director • Unreported | 22 Feb 2017←8 Years→13 Jan 2026 | Dissolved | |
| John Plummer Holdings Ltd Director • Structural Engineer | 10 May 2016←9 Years→Current | Active | |
| John Plummer Structural Engineering Ltd Director • Unreported | 7 Dec 2012←13 Years→Current | Active | |
