| Company | Timeline | Status | |
| Michael A. Welch (Consulting Engineers) Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Michael A. Welch (Consulting Engineers) Limited Secretary • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Michael A. Welch (Consulting Engineers) Limited Secretary • Unreported | 1 Jan 1970←55 Years→23 Apr 2025 | Active | |
