| Company | Timeline | Status | |
| The Twentieth Century Society Director • Retired | 12 Jan 2005←5 Years→29 Jun 2010 | Active | |
| The British Archaeological Association Director • Retired | 8 Oct 2003←2 Years 12 Months→4 Oct 2006 | Active | |
The Pevsner Books Trust Director • Author | 18 Sep 2002←12 Years→6 Jan 2015 | Dissolved | |
The Pevsner Books Trust Secretary • Editor | 18 Sep 1996←6 Years→18 Sep 2002 | Dissolved | |
| Heritage Of London Trust Limited(The) Director • Editor | 12 Oct 1991←19 Years→12 Oct 2010 | Active | |
