| Company | Timeline | Status | |
| Argon Ventures Limited Director • Chartered Engineer | 17 Aug 1999←1 Year 10 Months→25 Jun 2001 | Dissolved | |
| Morgan Beton And Monierbau Limited Director • Civil Engineer | 1 Jan 1994←1 Year 1 Month→22 Feb 1995 | Dissolved | |
| Charles Grip Surfacing Limited Director • Civil Engineer | 26 Oct 1993←1 Year 3 Months→22 Feb 1995 | Active | |
| Charles Gregory (Civil Engineering) Limited Director • Civil Engineer | 26 Oct 1993←1 Year 3 Months→22 Feb 1995 | Dissolved | |
| GT (Scotland) Construction Limited Director • Civil Engineer | 12 May 1989←5 Years→22 Feb 1995 | Dissolved | |
| F K Lowry Limited Director • Chartered Engineer | 23 Nov 1981←16 Years→2 Nov 1998 | Active | |
| Charles Brand M&E Limited Director • Chartered Engineer | 22 Jun 1979←19 Years→2 Nov 1998 | Active | |
