| Company | Timeline | Status | |
| Nick Walker Landscape Architecture Ltd Director • Director  | 29 Mar 2024←1 Year 7 Months→Current  | Active  | |
| Barnes Walker Landscapes Ltd Director • Landscape Architect  | 5 Apr 2005←20 Years→Current  | Active  | |
| Barnes Walker Limited Director • Landscape Architect  | 6 Jul 2001←22 Years→15 Apr 2024  | Active  | |
BWP Landscapes Ltd Director • Landscape Architect  | 1 Oct 1997←16 Years→19 Aug 2014  | Dissolved  | |
