| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Bissett Adams Johnston Ltd | 04793411 | 01/01/2004 | Dissolved |
| Harrovian Developments Ltd | 02268721 | 01/12/1990 | Dissolved |
| Harrovian Group Plc | 02281386 | 30/11/1990 | Dissolved |
| Harrovian Managed Houses Limited | 02585188 | 25/02/1991 | Dissolved |
| Hollybush Farm (Buckinghamshire) Ltd | 04830340 | 26/09/2003 | Dissolved |
| Hollybush Lane Ltd | 04827310 | 26/09/2003 | Dissolved |
| Johnston Group International Ltd | 04571472 | 23/10/2002 | Dissolved |
| Johnston Group Leisure Ltd | 04590686 | 23/11/2002 | Dissolved |
| Johnston Group Project Management & Construction Ltd | 04571485 | 23/10/2002 | Dissolved |
| Johnston Group Uk Ltd | 04571477 | 23/10/2002 | Dissolved |
| Johnston Group Waste Management & Recycling Ltd | 04897186 | 01/01/2004 | Dissolved |
| Kent Finance Ltd | 03157541 | 01/01/2004 | Dissolved |
| Lotrun Ltd | 02319735 | 21/11/1990 | Dissolved |
| Stanborough Building Co Ltd | 02333670 | 23/10/2002 | Dissolved |
| The Johnston Group of Companies Ltd | 04593798 | 11/12/2002 | Dissolved |
| Whitecliffs Development Park ( Phase Iv ) Ltd | 04946294 | 27/01/2005 | Dissolved |
| Whitecliffs Development Park (Phase 1) Ltd | 04944623 | 01/01/2004 | Dissolved |
| Whitecliffs Development Park (Phase 2) Ltd | 04687376 | 07/03/2003 | Dissolved |
| Whitecliffs Development Park (Phase Two) Building Division L | 04750538 | 11/11/2003 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Caversham Properties Ltd | 02602357 | 08/05/1991 | 03/02/1992 | Dissolved |
| Mirrabeau (Watford) Ltd | 01905889 | 21/06/1991 | 03/02/1992 | Dissolved |
| Whitecliffs Development Park (Phase 5) Ltd | 05068764 | 01/04/2005 | 28/01/2006 | Dissolved |
| Whitecliffs Holdings Ltd | 05132765 | 02/03/2006 | 28/04/2006 | Dissolved |