All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Dec 2022 | Convert 1A and 1B to 1 and 1.1 as, whilst independent frames, they are the same collection and logically connected | |
| 25 Sep 2020 | 1-6: turning added; 1-3: canon info added; fr1A: layout added; | Mike Chester via 00014005 |
| fr1B: material,layout added,date confirmed | Mike Chester via 00014005 | |
| 16 May 2014 | Note added re discrepancy CB Derbys(GAD, pt3) re wt of 4th | JCB / GAD via e-mail |
| frame 1,2: renumbered 1A,1B (both at same level but independent) | Phil Gay via e-mail | |
| 13 May 2010 | 1-6: frameid added; frame info added | John Baldwin via database |
| 10 Jun 2009 | PN info modified (from Fri) to Thu | Anthony Cotton: DDA Annual Report via e-mail |
| 17 May 2004 | Tenor nominal added | Nick Bowden#39 (David Kelly data) via e-mail |