All changes to tower
| Date | Change | Source |
|---|---|---|
| 2 Aug 2016 | 1: date amended (to approx) | David Sloman via e-mail |
| 12 Dec 2010 | 2: canon info amended | David Sloman via e-mail |
| 1-3: frame id added; frame info added | John Baldwin via database | |
| 8 Jun 2005 | GF, u/r, st line added | Nick Bowden#53 via e-mail |