| Company | Timeline | Status | |
| Brian Cowperthwaite Limited Director • Tutor | 1 Oct 2002←23 Years→Current | Active | |
| Brian Cowperthwaite Limited Secretary • Administrator | 26 Sep 2002←23 Years→Current | Active | |
| T A Cowperthwaite Limited Secretary • Administrator | 8 Apr 2002←23 Years→Current | Active | |
| T A Cowperthwaite Limited Secretary • Administrator | 8 Apr 2002←22 Years→5 Jul 2024 | Active | |
