| Company | Timeline | Status | |
| Calcot Park Management Company Limited Secretary • Retired | 12 May 2006←4 Months→3 Oct 2006 | Active | |
| White (Reading Properties) Limited Secretary • Unreported | 15 Nov 1991←4 Years→11 Nov 1996 | Active | |
| Calcot Park Management Company Limited Director • Retired | 23 May 1991←32 Years→29 Sep 2023 | Active | |
| D.E. White Estates Limited Director • Landlord | 8 Apr 1991←34 Years→Current | Active | |
| D.E. White Estates Limited Secretary • Unreported | 8 Apr 1991←6 Years→27 Mar 1998 | Active | |
| White (Reading Properties) Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| D.E. White Estates Limited Director • Landlord | 1 Jan 1970←55 Years→15 Mar 2025 | Active | |
