All changes to tower
| Date | Change | Source |
|---|---|---|
| 12 Jul 2016 | Presence of simulator noted | Graham Nabb via e-mail |
| 11 Apr 2013 | Sct: canon info, turning, note added; frame info added | Chris Pickford via 00010347 |
| 4 Aug 2009 | 1-6: turning, frame id added; 1: nominal added; frame info added | Mike Chester via 00007969 |
| 17 Jan 2008 | URL amended | Mike Chester email via e-mail |
| 29 Mar 2003 | URL modified (again) | Mike Chester via e-mail |