| Company | Timeline | Status | |
| National Parks UK Limited Director • Garden Historian | 3 Jul 2017←1 Year 11 Months→5 Jun 2019 | Dissolved | |
| Ymddiriedolaeth Gerddi Hanesyddol Cymru - Welsh Historic Gardens Trust Director • None | 9 Jun 2007←5 Years→16 Jun 2012 | Active | |
| Aberglasney Restoration Trust Director • Unreported | 5 Dec 1999←25 Years→Current | Active | |
