All changes to tower
| Date | Change | Source |
|---|---|---|
| 28 Sep 2015 | 1-5: nominal added | Chris Pickford via 00011347 |
| 19 Aug 2014 | 5: date amended | Philip Denton via 00010846 |
| 8 Apr 2011 | 1,2,4: canon info added | David Sloman via 00009210 |
| 1-5: frame id added; frame info added | John Baldwin via database | |
| 25 Jan 2004 | URL changed | Gary J Sheppard: SDGR webmaster via e-mail |
| 8 Jan 2004 | URL added | Gary J Sheppard: SDGR webmaster via e-mail |