| Company | Timeline | Status | |
| LLGG Properties Limited Director • Company Director | 20 Jul 2020←5 Years→Current | Active | |
| Buchanan Building & Design Services Ltd Director • Company Director | 6 Jun 2019←6 Years→Current | Active | |
| Buchanan MS Holdings Ltd Director • Company Director | 6 Jun 2019←6 Years→Current | Active | |
| Wave Scotland Limited Director • Company Director | 10 Aug 2016←9 Years→Current | Active | |
| Buchanan Mechanical Services Limited Director • Company Director | 27 Sep 2012←13 Years→Current | Active | |
Buchanan Plumbing & Mechanical Services Ltd Director • Director | 30 Mar 2008←4 Years→30 Nov 2012 | Dissolved | |
