All changes to tower
| Date | Change | Source |
|---|---|---|
| 13 Feb 2017 | 1,3: canon info added; 1,2: nominal added; 3: nominal amended | Tim Jackson via 00011979 |
| 15 Jul 2012 | (W+P) URL added | Rosemary Oakeshott via e-mail |
| 8 Jun 2005 | GF, tenor note (& nominal = Bb-19c), st line added | Nick Bowden#53 via e-mail |