| Company | Timeline | Status | |
| Buchanan Technologies Limited Director • Company Director | 12 Apr 2022←2 Years 6 Months→24 Oct 2024 | Active | |
| Colin Buchanan And Partners Limited Director • Company Director | 23 Jan 2006←19 Years→Current | Active | |
| Colin Buchanan And Partners Limited Director • Company Director | 1 Jul 2001←9 Years→2 Jun 2011 | Dissolved | |
| Buchanan Computing Limited Secretary • Unreported | 28 May 1999←7 Months→1 Jan 2000 | Active | |
| Buchanan Computing Limited Director • Director | 6 Nov 1996←27 Years→24 Oct 2024 | Active | |
