All changes to tower
| Date | Change | Source |
|---|---|---|
| 9 Jul 2021 | URL amended | Tim Jackson |
| 5 Sep 2017 | 1: diam added | David Sloman via 00012398 |
| 17 Aug 2016 | all: frameid added; 1-3: canons added; 3,4: turning added; | John Baldwin via database |
| 3(rather than 4): 'historically important'; frame info added | David Sloman via e-mail | |
| 13 Aug 2014 | URL added | Julia Deady via e-mail |
| 5 Oct 2004 | Tenor nominal added | David Kelly via e-mail |