All changes to tower
| Date | Change | Source |
|---|---|---|
| 16 Sep 2016 | PN info added | TimJ (info: Bob Gosse) via e-mail |
| 15 Jul 2012 | (W+P) URL added | Rosemary Oakeshott via e-mail |
| 9 Jul 2009 | 1-5: nominal added; 2-6: canon info added; frame info added | Andrew Higson via 00007737 |