All changes to tower
| Date | Change | Source |
|---|---|---|
| 14 Jan 2023 | 1: diameter added | Whitechapel records via David Sloman |
| 22 Oct 2017 | 1-3: frameid added; frame info added | David Sloman via e-mail |
| 4 Sep 2015 | u/r added (unsafe frame) | Simon Webb (info from Ch Wdn on WofA advice) via e-mail |
| 28 Oct 2006 | Tenor nominal added (A+23c); GF added | Tim Jackson#102 via e-mail |